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1. Qweak: First Direct Measurement of the Proton’s Weak Charge

Author: Androic D., Armstrong D.S., Asaturyan A., Averett T., Balewski J., Bartlett K., Beaufait J., Beminiwattha R.S., Benesch J., Benmokhtar F., Birchall J., Carlini R.D., Cates G.D., Cornejo J.C., Covrig S., Dalton M.M., Davis C.A., Deconinck W., Diefenbach J., Dowd J.F., Dunne J.A., Dutta D., Duvall W.S., Elaasar M., Falk W.R., Finn J.M., Forest T., Gal C., Gaskell D., Gericke M.T.W., Grames J., Gray V.M., Grimm K., Guo F., Hoskins J.R., Johnston K., Jones D., Jones M., Jones R., Kargiantoulakis M., King P.M., Korkmaz E., Kowalski S., Leacock J., Leckey J., Lee A.R., Lee J.H., Lee L., MacEwan S., Mack D., Magee J.A., Mahurin R., Mammei J., Martin J.W., McHugh M.J., Meekins D., Mei J., Michaels R., Micherdzinska A., Mkrtchyan A., Mkrtchyan H., Morgan N., Myers K.E., Narayan A., Ndukum L.Z., Nelyubin V., Nuhait H., Nuruzzaman, van Oers W.T.H, Opper A.K., Page S.A., Pan J., Paschke K.D., Phillips S.K., Pitt M.L., Poelker M., Rajotte J.F., Ramsay W.D., Roche J., Sawatzky B., Seva T., Shabestari M.H., Silwal R., Simicevic N., Smith G.R., Solvignon P., Spayde D.T., Subedi A., Subedi R., Suleiman R., Tadevosyan V., Tobias W.A., Tvaskis V., Waidyawansa B., Wang P., Wells S.P., Wood S.A., Yang S., Young R.D., Zang P., and Zhamkochyan S.
Subjects: Physics, QC1-999
Abstract: The Qweak experiment, which took data at Jefferson Lab in the period 2010 - 2012, will precisely determine the weak charge of the proton by measuring the parity-violating asymmetry in elastic e-p scattering at 1.1 GeV using a longitudinally polarized electron beam and a liquid hydrogen target at a low momentum transfer of Q2 = 0.025 (GeV/c)2. The weak charge of the proton is predicted by the Standard Model and any significant deviation would indicate physics beyond the Standard Model. The technical challenges and experimental apparatus for measuring the weak charge of the proton will be discussed, as well as the method of extracting the weak charge of the proton. The results from a small subset of the data, that has been published, will also be presented. Furthermore an update will be given of the current status of the data analysis.
Published: 2017
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2. First Determination of the 27Al Neutron Distribution Radius from a Parity-Violating Electron Scattering Measurement

Author: QWeak Collaboration, Androic, D., Armstrong, D. S., Bartlett, K., Beminiwattha, R. S., Benesch, J., Benmokhtar, F., Birchall, J., Carlini, R. D., Cornejo, J. C., Dusa, S. Covrig, Dalton, M. M., Davis, C. A., Deconinck, W., Dowd, J. F., Dunne, J. A., Dutta, D., Duvall, W. S., Elaasar, M., Falk, W. R., Finn, J. M., Forest, T., Gal, C., Gaskell, D., Gericke, M. T. W., Gray, V. M., Grimm, K., Guo, F., Hoskins, J. R., Jones, D. C., Jones, M. K., Kargiantoulakis, M., King, P. M., Korkmaz, E., Kowalski, S., Leacock, J., Leckey, J., Lee, A. R., Lee, J. H., Lee, L., MacEwan, S., Mack, D., Magee, J. A., Mahurin, R., Mammei, J., Martin, J. W., McHugh, M. J., Meekins, D., Mei, J., Mesick, K. E., Michaels, R., Micherdzinska, A., Mkrtchyan, A., Mkrtchyan, H., Narayan, A., Ndukum, L. Z., Nelyubin, V., Nuruzzaman, van Oers, W. T. H, Owen, V. F., Page, S. A., Pan, J., Paschke, K. D., Phillips, S. K., Pitt, M. L., Radloff, R. W., Rajotte, J. F., Ramsay, W. D., Roche, J., Sawatzky, B., Seva, T., Shabestari, M. H., Silwal, R., Simicevic, N., Smith, G. R., Solvignon, P., Spayde, D. T., Subedi, A., Subedi, R., Suleiman, R., Tadevosyan, V., Tobias, W. A., Tvaskis, V., Waidyawansa, B., Wang, P., Wells, S. P., Wood, S. A., Yang, S., Zang, P., Zhamkochyan, S., Christy, M. E., Horowitz, C. J., Fattoyev, F. J., and Lin, Z.
Subjects: Nuclear Experiment
Abstract: We report the first measurement of the parity-violating elastic electron scattering asymmetry on 27Al. The 27Al elastic asymmetry is A_PV = 2.16 +- 0.11 (stat) +- 0.16 (syst) ppm, and was measured at =0.02357 +- 0.0001 GeV^2, = 7.61 +- 0.02 degrees, and = 1.157 GeV with the Qweak apparatus at Jefferson Lab. Predictions using a simple Born approximation as well as more sophisticated distorted-wave calculations are in good agreement with this result. From this asymmetry the 27Al neutron radius R_n = 2.89 +- 0.12 fm was determined using a many-models correlation technique. The corresponding neutron skin thickness R_n-R_p = -0.04 +- 0.12 fm is small, as expected for a light nucleus with a neutron excess of only 1. This result thus serves as a successful benchmark for electroweak determinations of neutron radii on heavier nuclei. A tree-level approach was used to extract the 27Al weak radius R_w = 3.00 +- 0.15 fm, and the weak skin thickness R_wk - R_ch = -0.04 +- 0.15 fm. The weak form factor at this Q^2 is F_wk = 0.39 +- 0.04., Comment: Revised version after referee's comments and suggestions. Some improvements and clarification to the text, no changes to the figures, tables, results or conclusions. 7 pages, 3 figures, 3 tables
Published: 2021
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3. Early Results from the Qweak Experiment

Author: Androic D., Armstrong D.S., Asaturyan A., Averett T., Balewski J., Beaufait J., Beminiwattha R.S., Benesch J., Benmokhtar F., Birchall J., Carlini R.D., Cates G.D., Cornejo J.C., Covrig S., Dalton M.M., Davis C.A., Deconinck W., Diefenbach J., Dowd J.F., Dunne J.A., Dutta D., Duvall W.S., Elaasar M., Falk W.R., Finn J.M., Forest T., Gaskell D., Gericke M.T.W., Grames J., Gray V.M., Grimm K., Guo F., Hoskins J.R., Johnston K., Jones D., Jones M., Jones R., Kargiantoulakis M., King P.M., Korkmaz E., Kowalski S., Leacock J., Leckey J., Lee A.R., Lee J.H., Lee L., MacEwan S., Mack D., Magee J.A., Mahurin R., Mammei J., Martin J., McHugh M.J., Meekins D., Mei J., Michaels R., Micherdzinska A., Mkrtchyan A., Mkrtchyan H., Morgan N., Myers K.E., Narayan A., Ndukum L.Z., Nelyubin V., Nuruzzaman, van Oers W.T.H, Opper A.K., Page S.A., Pan J., Paschke K., Phillips S.K., Pitt M.L., Poelker M., Rajotte J.F., Ramsay W.D., Roche J., Sawatzky B., Seva T., Shabestari M.H., Silwal R., Simicevic N., Smith G.R., Solvignon P., Spayde D.T., Subedi A., Subedi R., Suleiman R., Tadevosyan V., Tobias W.A., Tvaskis V., Waidyawansa B., Wang P., Wells S.P., Wood S.A., Yang S., Young R.D., and Zhamkochyan S.
Subjects: Physics, QC1-999
Abstract: A subset of results from the recently completed Jefferson Lab Qweak experiment are reported. This experiment, sensitive to physics beyond the Standard Model, exploits the small parity-violating asymmetry in elastic e→p$\vec e{\rm{p}}$ scattering to provide the first determination of the proton’s weak charge Qwp$Q_w^p$. The experiment employed a 180 μA longitudinally polarized 1.16 GeV electron beam on a 35 cm long liquid hydrogen target. Scattered electrons in the angular range 6° < θ < 12° corresponding to Q2 = 0.025 GeV2 were detected in eight Cerenkov detectors arrayed symmetrically around the beam axis. The goals of the experiment were to provide a measure of e→p$\vec e{\rm{p}}$ to 4.2% (combined statisstatistical and systematic error), which implies a measure of sin2(θw) at the level of 0.3%, and to help constrain the vector weak quark charges C1u and C1d. The experimental method is described, with particular focus on the challenges associated with the world’s highest power LH2 target. The new constraints on C1u and C1d provided by the subset of the experiment’s data analyzed to date will also be shown, together with the extracted weak charge of the neutron.
Published: 2014
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4. Measurement of the Beam-Normal Single-Spin Asymmetry for Elastic Electron Scattering from $^{12}$C and $^{27}$Al

Author: QWeak Collaboration, Androic, D., Armstrong, D. S., Asaturyan, A., Bartlett, K., Beminiwattha, R. S., Benesch, J., Benmokhtar, F., Birchall, J., Carlini, R. D., Christy, M. E., Cornejo, J. C., Dusa, S. Covrig, Dalton, M. M., Davis, C. A., Deconinck, W., Dowd, J. F., Dunne, J. A., Dutta, D., Duvall, W. S., Elassar, M., Falk, W. R., Finn, J. M., Forest, T., Gal, C., Gaskell, D., Gericke, M. T. W., Gray, V. M., Guo, F., Hoskins, J. R., Jones, D. C., Kargiantoulakis, M., King, P. M., Korkmaz, E., Kowalski, S., Leacock, J., Leckey, J. P., Lee, A. R., Lee, J. H., Lee, L., MacEwan, S., Mack, D., Magee, J. A., Mahurin, R., Mammei, J., Martin, J. W., McHugh, M. J., Meekins, D., Mesick, K. E., Michaels, R., Mkrtchyan, A., Mkrtchyan, H., Narayan, A., Ndukum, L. Z., Nuruzzaman, Nelyubin, V., van Oers, W. T. H, Owen, V. F., Page, S. A., Pan, J., Paschke, K. D., Phillips, S. K., Pitt, M. L., Radloff, R. W., Rajotte, J. F., Ramsay, W. D., Roche, J., Sawatzky, B., Seva, T., Shabestari, M. H., Silwal, R., Simicevic, N., Smith, G. R., Solvignon, P., Spayde, D. T., Subedi, A., Subedi, R., Tadevosyan, V., Tobias, W. A., Waidyawansa, B., Wang, P., Wells, S. P., Wood, S. A., Zang, P., and Zhamkochyan, S.
Subjects: Nuclear Experiment
Abstract: We report measurements of the parity-conserving beam-normal single-spin elastic scattering asymmetries $B_n$ on $^{12}$C and $^{27}$Al, obtained with an electron beam polarized transverse to its momentum direction. These measurements add an additional kinematic point to a series of previous measurements of $B_n$ on $^{12}$C and provide a first measurement on $^{27}$Al. The experiment utilized the Qweak apparatus at Jefferson Lab with a beam energy of 1.158 GeV. The average lab scattering angle for both targets was 7.7 degrees, and the average $Q^2$ for both targets was 0.02437 GeV$^2$ (Q=0.1561 GeV). The asymmetries are $B_n$ = -10.68 $\pm$ 0.90 stat) $\pm$ 0.57 (syst) ppm for $^{12}$C and $B_n$ = -12.16 $\pm$ 0.58 (stat) $\pm$ 0.62 (syst) ppm for $^{27}$Al. The results are consistent with theoretical predictions, and are compared to existing data. When scaled by Z/A, the Q-dependence of all the far-forward angle (theta < 10 degrees) data from $^{1}$H to $^{27}$Al can be described by the same slope out to $Q \approx 0.35$ GeV. Larger-angle data from other experiments in the same Q range are consistent with a slope about twice as steep., Comment: Minor changes after refereeing; version as accepted for Physical Review C. Cosmetic changes to several figures, one author added. 22 pages, 8 figures
Published: 2021
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5. Spectroscopy of $A=9$ hyperlithium by the $(e,e^{\prime}K^{+})$ reaction

Author: Gogami, T., Chen, C., Kawama, D., Achenbach, P., Ahmidouch, A., Albayrak, I., Androic, D., Asaturyan, A., Asaturyan, R., Ates, O., Baturin, P., Badui, R., Boeglin, W., Bono, J., Brash, E., Carter, P., Chiba, A., Christy, E., Danagoulian, S., De Leo, R., Doi, D., Elaasar, M., Ent, R., Fujii, Y., Fujita, M., Furic, M., Gabrielyan, M., Gan, L., Garibaldi, F., Gaskell, D., Gasparian, A., Han, Y., Hashimoto, O., Horn, T., Hu, B., Hungerford, Ed. V., Jones, M., Kanda, H., Kaneta, M., Kato, S., Kawai, M., Khanal, H., Kohl, M., Liyanage, A., Luo, W., Maeda, K., Margaryan, A., Markowitz, P., Maruta, T., Matsumura, A., Maxwell, V., Meekins, D., Mkrtchyan, A., Mkrtchyan, H., Nagao, S., Nakamura, S. N., Narayan, A., Neville, C., Niculescu, G., Niculescu, M. I., Nunez, A., Nuruzzaman, Okayasu, Y., Petkovic, T., Pochodzalla, J., Qiu, X., Reinhold, J., Rodriguez, V. M., Samanta, C., Sawatzky, B., Seva, T., Shichijo, A., Tadevosyan, V., Tang, L., Taniya, N., Tsukada, K., Veilleux, M., Vulcan, W., Wesselmann, F. R., Wood, S. A., Yamamoto, T., Ya, L., Ye, Z., Yokota, K., Yuan, L., Zhamkochyan, S., and Zhu, L.
Subjects: Nuclear Experiment
Abstract: Missing mass spectroscopy with the $(e,e^{\prime}K^{+})$ reaction was performed at Jefferson Laboratory's Hall C for the neutron rich $\Lambda$ hypernucleus $^{9}_{\Lambda}{\rm Li}$. The ground state energy was obtained to be $B_{\Lambda}^{\rm g.s.}=8.84\pm0.17^{\rm stat.}\pm0.15^{\rm sys.}~{\rm MeV}$ by using shell model calculations of a cross section ratio and an energy separation of the spin doublet states ($3/2^{+}_1$ and $5/2^{+}_1$). In addition, peaks that are considered to be states of [$^{8}{\rm Li}(3^{+})\otimes s_{\Lambda}=3/2^{+}_{2}, 1/2^{+}$] and [$^{8}{\rm Li}(1^{+})\otimes s_{\Lambda}=5/2^{+}_{2}, 7/2^{+}$] were observed at $E_{\Lambda}({\rm no.~2})=1.74\pm0.27^{\rm stat.}\pm0.11^{\rm sys.}~{\rm MeV}$ and $E_{\Lambda}({\rm no.~3})=3.30\pm0.24^{\rm stat.}\pm0.11^{\rm sys.}~{\rm MeV}$, respectively. The $E_{\Lambda}({\rm no.~3})$ is larger than shell model predictions by a few hundred keV, and the difference would indicate that a ${\rm ^{5}He}+t$ structure is more developed for the $3^{+}$ state than those for the $2^{+}$ and $1^{+}$ states in a core nucleus $^{8}{\rm Li}$ as a cluster model calculation suggests., Comment: 5 pages, 3 figures
Published: 2021
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6. Precision Measurement of the Beam-Normal Single-Spin Asymmetry in Forward-Angle Elastic Electron-Proton Scattering

Author: QWeak collaboration, Androic, D., Armstrong, D. S., Asaturyan, A., Bartlett, K., Beaufait, J., Beminiwattha, R. S., Benesch, J., Benmokhtar, F., Birchall, J., Carlini, R. D., Cornejo, J. C., Dusa, S. Covrig, Dalton, M. M., Davis, C. A., Deconinck, W., Dowd, J. F., Dunne, J. A., Dutta, D., Duvall, W. S., Elaasar, M., Falk, W. R., Finn, J. M., Forest, T., Gal, C., Gaskell, D., Gericke, M. T. W., Grames, J., Gray, V. M., Grimm, K., Guo, F., Hoskins, J. R., Jones, D., Jones, M. K., Jones, R. T., Kargiantoulakis, M., King, P. M., Korkmaz, E., Kowalski, S., Leacock, J., Leckey, J. P., Lee, A. R., Lee, J. H., Lee, L., MacEwan, S., Mack, D., Magee, J. A., Mahurin, R., Mammei, J., Martin, J. W., McHugh, M. J., Meekins, D., Mei, J., Mesick, K. E., Michaels, R., Micherdzinska, A., Mkrtchyan, A., Mkrtchyan, H., Morgan, N., Narayan, A., Ndukum, L. Z., Nelyubin, V., Nuruzzaman, van Oers, W. T. H, Owen, V. F., Page, S. A., Pan, J., Paschke, K. D., Phillips, S. K., Pitt, M. L., Radloff, R. W., Rajotte, J. F., Ramsay, W. D., Roche, J., Sawatzky, B., Seva, T., Shabestari, M. H., Silwal, R., Simicevic, N., Smith, G. R., Solvignon, P., Spayde, D. T., Subedi, A., Subedi, R., Suleiman, R., Tadevosyan, V., Tobias, W. A., Tvaskis, V., Waidyawansa, B., Wang, P., Wells, S. P., Wood, S. A., Yang, S., Zang, P., and Zhamkochyan, S.
Subjects: Nuclear Experiment
Abstract: A beam-normal single-spin asymmetry generated in the scattering of transversely polarized electrons from unpolarized nucleons is an observable related to the imaginary part of the two-photon exchange process. We report a 2% precision measurement of the beam-normal single-spin asymmetry in elastic electron-proton scattering with a mean scattering angle of theta_lab = 7.9 degrees and a mean energy of 1.149 GeV. The asymmetry result is B_n = -5.194 +- 0.067 (stat) +- 0.082 (syst) ppm. This is the most precise measurement of this quantity available to date and therefore provides a stringent test of two-photon exchange models at far-forward scattering angles (theta_lab -> 0) where they should be most reliable., Comment: 6 pages, 3 figures; Slightly revised version, after referee's comments; accepted in PRL
Published: 2020
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7. Recent results from the G0 experiment

Author: Roos P., Roche J., Ramsay W.D., Quinn B., Poelker M., Pitt M.L., Pillot P., Phillips S.K., Pate S.F., Papavassiliou V., Page S.A., van Oers W.T.H., Muether M., Mkrtchyan H., Mihovilovic M., Micherdzinska A., McKeown R.D., Martin J.W., Mammei J., Lung A., Liu J., Lee L., Kox S., Korsch W., King P.M., Jones M., Horn T., Hansknecht J., Guillard G., Grames J., Gericke M.T.W., Gaskell D., Furget C., Franklin G., Flores G., Davis C.A., Ellis C., Coppens A., Chao Y.-C., Capuano C.L., Breuer H., Bosted P., Birchall J., Benmokhtar F., Bimbot L., Benesch J., Beise E.J., Beck D.H., Bailey S.L., Arvieux J., Armstrong D.S., Androić D., Real J.S., Schaub J., Seva T., Simicevic N., Smith G.R., Spayde D.T., Stutzman M., Suleiman R., Tadevosyan V., Versteegen M., Voutier E., Vulcan W., Wells S.P., Williamson S.E., and Wood S.A.
Subjects: Physics, QC1-999
Abstract: We have measured parity violating asymmetries in elastic electron-proton and quasi-elastic electrondeuteron scattering at backward electron angle. These measurements have been done at two momentum transfers : Q2 = 0.22 and 0.63 (GeV/c)2 . Together with our previous forward angle measurement [1], we can extract strange quark contributions to the electromagnetic form factors of the nucleon, as well as nucleon axial form factor coming from the neutral weak interaction. The results indicate a strange quark magnetic contribution close to zero at these Q2 , and a possible non zero strange quark electric contribution for the high Q2 . The ﬁrst Q2 behavior measurement of the nucleon axial form factor in elastic electron scattering shows a good agreement with radiative corrections calculated at Q2 = 0 and with a dipole form using the axial mass determined in neutrino scattering.
Published: 2010
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8. Measurement of the beam-normal single-spin asymmetry for elastic electron scattering from C12 and Al27

Author: Androić, D, Armstrong, DS, Asaturyan, A, Bartlett, K, Beminiwattha, RS, Benesch, J, Benmokhtar, F, Birchall, J, Carlini, RD, Christy, ME, Cornejo, JC, Dusa, S Covrig, Dalton, MM, Davis, CA, Deconinck, W, Dowd, JF, Dunne, JA, Dutta, D, Duvall, WS, Elaasar, M, Falk, WR, Finn, JM, Forest, T, Gal, C, Gaskell, D, Gericke, MTW, Gray, VM, Guo, F, Hoskins, JR, Jones, DC, Kargiantoulakis, M, King, PM, Korkmaz, E, Kowalski, S, Leacock, J, Leckey, JP, Lee, AR, Lee, JH, Lee, L, MacEwan, S, Mack, D, Magee, JA, Mahurin, R, Mammei, J, Martin, JW, McHugh, MJ, Meekins, D, Mesick, KE, Michaels, R, Mkrtchyan, A, Mkrtchyan, H, Narayan, A, Ndukum, LZ, Nelyubin, V, Nuruzzaman, van Oers, WTH, Owen, VF, Page, SA, Pan, J, Paschke, KD, Phillips, SK, Pitt, ML, Radloff, RW, Rajotte, JF, Ramsay, WD, Roche, J, Sawatzky, B, Seva, T, Shabestari, MH, Silwal, R, Simicevic, N, Smith, GR, Solvignon, P, Spayde, DT, Subedi, A, Subedi, R, Suleiman, R, Tadevosyan, V, Tobias, WA, Tvaskis, V, Waidyawansa, B, Wang, P, Wells, SP, Wood, SA, Zang, P, and Zhamkochyan, S
Subjects: Clinical Research, nucl-ex
Abstract: We report measurements of the parity-conserving beam-normal single-spinelastic scattering asymmetries $B_n$ on $^{12}$C and $^{27}$Al, obtained withan electron beam polarized transverse to its momentum direction. Thesemeasurements add an additional kinematic point to a series of previousmeasurements of $B_n$ on $^{12}$C and provide a first measurement on $^{27}$Al.The experiment utilized the Qweak apparatus at Jefferson Lab with a beam energyof 1.158 GeV. The average lab scattering angle for both targets was 7.7degrees, and the average $Q^2$ for both targets was 0.02437 GeV$^2$ (Q=0.1561GeV). The asymmetries are $B_n$ = -10.68 $\pm$ 0.90 stat) $\pm$ 0.57 (syst) ppmfor $^{12}$C and $B_n$ = -12.16 $\pm$ 0.58 (stat) $\pm$ 0.62 (syst) ppm for$^{27}$Al. The results are consistent with theoretical predictions, and arecompared to existing data. When scaled by Z/A, the Q-dependence of all thefar-forward angle (theta < 10 degrees) data from $^{1}$H to $^{27}$Al can bedescribed by the same slope out to $Q \approx 0.35$ GeV. Larger-angle data fromother experiments in the same Q range are consistent with a slope about twiceas steep.
Published: 2021

9. Parity-Violating Inelastic Electron-Proton Scattering at Low $Q^2$ Above the Resonance Region

Author: QWeak Collaboration, Androic, D., Armstrong, D. S., Asaturyan, A., Bartlett, K., Beminiwattha, R. S., Benesch, J., Benmokhtar, F., Birchall, J., Carlini, R. D., Cornejo, J. C., Dalton, M. M., Davis, C. A., Deconinck, W., Dowd, J. F., Dunne, J. A., Dutta, D., Duvall, W. S., Falk, W. R., Finn, J. M., Gal, C., Gaskell, D., Gericke, M. T. W., Grames, J., Guo, F., Hoskins, J. R., Jones, D., Jones, M. K., Jones, R., Kargiantoulakis, M., King, P. M., Korkmaz, E., Kowalski, S., Leacock, J., Lee, A. R., Lee, J. H., Lee, L., MacEwan, S., Mack, D., Magee, J. A., Mammei, J., Martin, J. W., McHugh, M. J., Meekins, D., Mesick, K. E., Michaels, R., Micherdzinska, A., Mkrtchyan, A., Mkrtchyan, H., Morgan, N., Narayan, A., Nelyubin, V., van Oers, W. T. H, Owen, V. F., Page, S. A., Pan, J., Paschke, K. D., Phillips, S. K., Pitt, M. L., Radloff, R. W., Ramsay, W. D., Roche, J., Sawatzky, B., Seva, T., Shabestari, M. H., Silwal, R., Simicevic, N., Smith, G. R., Solvignon, P., Spayde, D. T., Subedi, A., Tadevosyan, V., Waidyawansa, B., Wang, P., Wells, S. P., Wood, S. A., and Zang, P.
Subjects: Nuclear Experiment, High Energy Physics - Phenomenology
Abstract: We report the measurement of the parity-violating asymmetry for the inelastic scattering of electrons from the proton, at $Q^2 = 0.082$ GeV$^2$ and $ W = 2.23$ GeV, above the resonance region. The result $A_{\rm Inel} = - 13.5 \pm 2.0 ({\rm stat}) \pm 3.9 ({\rm syst})$~ppm agrees with theoretical calculations, and helps to validate the modeling of the $\gamma Z$ interference structure functions $F_1^{\gamma Z}$ and $F_2^{\gamma Z}$ used in those calculations, which are also used for determination of the two-boson exchange box diagram ($\Box_{\gamma Z}$) contribution to parity-violating elastic scattering measurements. A positive parity-violating asymmetry for inclusive $\pi^-$ production was observed, as well as positive beam-normal single-spin asymmetry for scattered electrons and a negative beam-normal single-spin asymmetry for inclusive $\pi^-$ production., Comment: 18 pages, 9 figures, version accepted in Physical Review C
Published: 2019
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10. Precision Measurement of the Weak Charge of the Proton

Author: Androic, D., Armstrong, D. S., Asaturyan, A., Averett, T., Balewski, J., Bartlett, K., Beaufait, J., Beminiwattha, R. S., Benesch, J., Benmokhtar, F., Birchall, J., Carlini, R. D., Cornejo, J. C., Dusa, S. Covrig, Dalton, M. M., Davis, C. A., Deconinck, W., Diefenbach, J., Dowd, J. F., Dunne, J. A., Dutta, D., Duvall, W. S., Elaasar, M., Falk, W. R., Finn, J. M., Forest, T., Gal, C., Gaskell, D., Gericke, M. T. W., Grames, J., Gray, V. M., Grimm, K., Guo, F., Hoskins, J. R., Jones, D., Jones, M., Jones, R., Kargiantoulakis, M., King, P. M., Korkmaz, E., Kowalski, S., Leacock, J., Leckey, J., Lee, A. R., Lee, J. H., Lee, L., MacEwan, S., Mack, D., Magee, J. A., Mahurin, R., Mammei, J., Martin, J. W., McHugh, M. J., Meekins, D., Mei, J., Mesick, K. E., Michaels, R., Micherdzinska, A., Mkrtchyan, A., Mkrtchyan, H., Morgan, N., Narayan, A., Ndukum, L. Z., Nelyubin, V., Nuhait, H., Nuruzzaman, van Oers, W. T. H., Opper, A. K., Page, S. A., Pan, J., Paschke, K. D., Phillips, S. K., Pitt, M. L., Poelker, M., Rajotte, J. F., Ramsay, W. D., Roche, J., Sawatzky, B., Seva, T., Shabestari, M. H., Silwal, R., Simicevic, N., Smith, G. R., Solvignon, P., Spayde, D. T., Subedi, A., Subedi, R., Suleiman, R., Tadevosyan, V., Tobias, W. A., Tvaskis, V., Waidyawansa, B., Wang, P., Wells, S. P., Wood, S. A., Yang, S., Young, R. D., Zang, P., and Zhamkochyan, S.
Subjects: Nuclear Experiment
Abstract: The fields of particle and nuclear physics have undertaken extensive programs to search for evidence of physics beyond that explained by current theories. The observation of the Higgs boson at the Large Hadron Collider completed the set of particles predicted by the Standard Model (SM), currently the best description of fundamental particles and forces. However, the theory's limitations include a failure to predict fundamental parameters and the inability to account for dark matter/energy, gravity, and the matter-antimater asymmetry in the universe, among other phenomena. Given the lack of additional particles found so far through direct searches in the post-Higgs era, indirect searches utilizing precise measurements of well predicted SM observables allow highly targeted alternative tests for physics beyond the SM. Indirect searches have the potential to reach mass/energy scales beyond those directly accessible by today's high-energy accelerators. The value of the weak charge of the proton Q_W^p is an example of such an indirect search, as it sets the strength of the proton's interaction with particles via the well-predicted neutral electroweak force. Parity violation (invariance under spatial inversion (x,y,z) -> (-x,-y,-z)) is violated only in the weak interaction, thus providing a unique tool to isolate the weak interaction in order to measure the proton's weak charge. Here we report Q_W^p=0.0719+-0.0045, as extracted from our measured parity-violating (PV) polarized electron-proton scattering asymmetry, A_ep=-226.5+-9.3 ppb. Our value of Q_W^p is in excellent agreement with the SM, and sets multi-TeV-scale constraints on any semi-leptonic PV physics not described within the SM., Comment: Direct link to Nature Version "https://rdcu.be/954U"
Published: 2019
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11. Measurements of Non-Singlet Moments of the Nucleon Structure Functions and Comparison to Predictions from Lattice QCD for $Q^2 = 4$ $\rm GeV^2$

Author: Albayrak, I., Mamyan, V., Christy, M. E., Ahmidouch, A., Arrington, J., Asaturyan, A., Bodek, A., Bosted, P., Bradford, R., Brash, E., Bruell, A., Butuceanu, C, Coleman, S. J., Commisso, M., Connell, S. H., Dalton, M. M., Danagoulian, S., Daniel, A., Day, D. B., Dhamija, S., Dunne, J., Dutta, D., Ent, R., Gaskell, D., Gasparian, A., Gran, R., Horn, T., Huang, Liting, Huber, G. M., Jayalath, C., Johnson, M., Jones, M. K., Kalantarians, N., Liyanage, A., Keppel, C. E., Kinney, E., Li, Y., Malace, S., Manly, S., Markowitz, P., Maxwell, J., Mbianda, N. N., McFarland, K. S., Meziane, M., Meziani, Z. E., Mills, G. B, Mkrtchyan, H., Mkrtchyan, A., Mulholland, J., Nelson, J., Niculescu, G., Niculescu, I., Pentchev, L., Puckett, A., Punjabi, V., Qattan, I. A., Reimer, P. E., Reinhold, J., Rodriguez, V. M, Rondon-Aramayo, O., Sakuda, M., Sakumoto, W. K., Segbefia, E., Seva, T., Sick, I., Slifer, K., Smith, G. R, Steinman, J., Solvignon, P., Tadevosyan, V., Tajima, S., Tvaskis, V., Smith, G. R., Vulcan, W. F., Walton, T., Wesselmann, F. R, Wood, S. A., and Ye, Zhihong
Subjects: Nuclear Experiment
Abstract: We present extractions of the nucleon non-singlet moments utilizing new precision data on the deuteron $F_2$ structure function at large Bjorken-$x$ determined via the Rosenbluth separation technique at Jefferson Lab Experimental Hall C. These new data are combined with a complementary set of data on the proton previously measured in Hall C at similar kinematics and world data sets on the proton and deuteron at lower $x$ measured at SLAC and CERN. The new Jefferson Lab data provide coverage of the upper third of the $x$ range, crucial for precision determination of the higher moments. In contrast to previous extractions, these moments have been corrected for nuclear effects in the deuteron using a new global fit to the deuteron and proton data. The obtained experimental moments represent an order of magnitude improvement in precision over previous extractions using high $x$ data. Moreover, recent exciting developments in Lattice QCD calculations provide a first ever comparison of these new experimental results with calculations of moments carried out at the physical pion mass, as well as a new approach which first calculates the quark distributions directly before determining moments.
Published: 2018
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12. Measurements of Nonsinglet Moments of the Nucleon Structure Functions and Comparison to Predictions from Lattice QCD for Q2=4 GeV2

Author: Albayrak, I, Mamyan, V, Christy, ME, Ahmidouch, A, Arrington, J, Asaturyan, A, Bodek, A, Bosted, P, Bradford, R, Brash, E, Bruell, A, Butuceanu, C, Coleman, SJ, Commisso, M, Connell, SH, Dalton, MM, Danagoulian, S, Daniel, A, Day, DB, Dhamija, S, Dunne, J, Dutta, D, Ent, R, Gaskell, D, Gasparian, A, Gran, R, Horn, T, Huang, Liting, Huber, GM, Jayalath, C, Johnson, M, Jones, MK, Kalantarians, N, Liyanage, A, Keppel, CE, Kinney, E, Li, Y, Malace, S, Manly, S, Markowitz, P, Maxwell, J, Mbianda, NN, McFarland, KS, Meziane, M, Meziani, ZE, Mills, GB, Mkrtchyan, H, Mkrtchyan, A, Mulholland, J, Nelson, J, Niculescu, G, Niculescu, I, Pentchev, L, Puckett, A, Punjabi, V, Qattan, IA, Reimer, PE, Reinhold, J, Rodriguez, VM, Rondon-Aramayo, O, Sakuda, M, Sakumoto, WK, Segbefia, E, Seva, T, Sick, I, Slifer, K, Smith, GR, Steinman, J, Solvignon, P, Tadevosyan, V, Tajima, S, Tvaskis, V, Vulcan, WF, Walton, T, Wesselmann, FR, Wood, SA, and Ye, Zhihong
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, E06-009 Collaboration, nucl-ex, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract: We present extractions of the nucleon nonsinglet moments utilizing new precision data on the deuteron F_{2} structure function at large Bjorken-x determined via the Rosenbluth separation technique at Jefferson Lab Experimental Hall C. These new data are combined with a complementary set of data on the proton previously measured in Hall C at similar kinematics and world datasets on the proton and deuteron at lower x measured at SLAC and CERN. The new Jefferson Lab data provide coverage of the upper third of the x range, crucial for precision determination of the higher moments. In contrast to previous extractions, these moments have been corrected for nuclear effects in the deuteron using a new global fit to the deuteron and proton data. The obtained experimental moments represent an order of magnitude improvement in precision over previous extractions using high x data. Moreover, recent exciting developments in lattice QCD calculations provide a first ever comparison of these new experimental results with calculations of moments carried out at the physical pion mass, as well as a new approach that first calculates the quark distributions directly before determining moments.
Published: 2019

13. Erratum to: Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at s = 13 TeV (Journal of High Energy Physics, (2018), 2018, 6, (127), 10.1007/JHEP06(2018)127)

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Escalante Del Valle, A, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, CE, Zarucki, M, Chekhovsky, V, Mossolov, V, Suarez Gonzalez, J, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Pieters, M, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Abu Zeid, S, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Postiau, N, Seva, T, Starling, E, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Trocino, D, Tytgat, M, Verbeke, W, Vermassen, B, Vit, M, and Zaganidis, N
Subjects: Mathematical Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: In both panels of figure 11, the unit of the z axis was mistakenly written as “pb” when it should have been “fb”. The corrected versions are shown in figure 1.
Published: 2019

14. Erratum to: Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at s=13 TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Escalante Del Valle, A, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Suarez Gonzalez, J, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Pieters, M, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Abu Zeid, S, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Postiau, N, Seva, T, Starling, E, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Trocino, D, Tytgat, M, Verbeke, W, Vermassen, B, Vit, M, and Zaganidis, N
Subjects: Particle and High Energy Physics, Physical Sciences, Mathematical Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Mathematical physics, Nuclear and plasma physics, Particle and high energy physics
Abstract: In both panels of figure 11, the unit of the z axis was mistakenly written as “pb” when it should have been “fb”. The corrected versions are shown in figure 1.
Published: 2019

15. Measurement of exclusive Υ photoproduction from protons in pPb collisions at sNN=5.02TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Del Valle, A Escalante, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Pieters, M, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Zeid, S Abu, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Seva, T, Starling, E, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Trocino, D, Tytgat, M, Verbeke, W, Vermassen, B, Vit, M, Zaganidis, N, and Bakhshiansohi, H
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, CMS, UPC, photoproduction, Y, pPb, CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract: The exclusive photoproduction of Υ(nS) meson states from protons, γp→Υ(nS)p (with n=1,2,3 ), is studied in ultraperipheral p Pb collisions at a centre-of-mass energy per nucleon pair of sNN=5.02TeV . The measurement is performed using the Υ(nS)→μ+μ- decay mode, with data collected by the CMS experiment corresponding to an integrated luminosity of 32.6 nb-1 . Differential cross sections as functions of the Υ(nS) transverse momentum squared pT2 , and rapidity y, are presented. The Υ(1S) photoproduction cross section is extracted in the rapidity range |y|
Published: 2019

16. Erratum: Measurement of prompt and nonprompt charmonium suppression in PbPb collisions at 5.02 TeV

Author: Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Valle, A. Escalante Del, Flechl, M., Friedl, M., Frühwirth, R., Ghete, V. M., Grossmann, J., Hrubec, J., Jeitler, M., König, A., Krammer, N., Krätschmer, I., Liko, D., Madlener, T., Mikulec, I., Pree, E., Rad, N., Rohringer, H., Schieck, J., Schöfbeck, R., Spanring, M., Spitzbart, D., Waltenberger, W., Wittmann, J., Wulz, C.-E., Zarucki, M., Chekhovsky, V., Mossolov, V., Gonzalez, J. Suarez, De Wolf, E. A., Croce, D. Di, Janssen, X., Lauwers, J., De Klundert, M. Van, Haevermaet, H. Van, Mechelen, P. Van, Remortel, N. Van, Zeid, S. Abu, Blekman, F., D’Hondt, J., De Bruyn, I., De Clercq, J., Deroover, K., Flouris, G., Lontkovskyi, D., Lowette, S., Marchesini, I., Moortgat, S., Moreels, L., Python, Q., Skovpen, K., Tavernier, S., Doninck, W. Van, Mulders, P. Van, Parijs, I. Van, Beghin, D., Bilin, B., Brun, H., Clerbaux, B., De Lentdecker, G., Delannoy, H., Dorney, B., Fasanella, G., Favart, L., Goldouzian, R., Grebenyuk, A., Kalsi, A. K., Lenzi, T., Luetic, J., Maerschalk, T., Marinov, A., Seva, T., Starling, E., Velde, C. Vander, Vanlaer, P., Vannerom, D., Yonamine, R., Zenoni, F., Cornelis, T., Dobur, D., Fagot, A., Gul, M., Khvastunov, I., Poyraz, D., Roskas, C., Salva, S., Tytgat, M., Verbeke, W., Zaganidis, N., Bakhshiansohi, H., Bondu, O., Brochet, S., Bruno, G., Caputo, C., Caudron, A., David, P., De Visscher, S., Delaere, C., Delcourt, M., Francois, B., Giammanco, A., Komm, M., Krintiras, G., Lemaitre, V., Magitteri, A., Mertens, A., Musich, M., Piotrzkowski, K., Quertenmont, L., Saggio, A., Marono, M. Vidal, Wertz, S., Zobec, J., Júnior, W. L. Aldá, Alves, F. L., Alves, G. A., Brito, L., Junior, M. Correa Martins, Hensel, C., Moraes, A., Pol, M. E., Teles, P. Rebello, Chagas, E. Belchior Batista Das, Carvalho, W., Chinellato, J., Coelho, E., Da Costa, E. M., Da Silveira, G. G., De Jesus Damiao, D., De Souza, S. Fonseca, Guativa, L. M. Huertas, Malbouisson, H., De Almeida, M. Melo, Herrera, C. Mora, Mundim, L., Nogima, H., Rosas, L. J. Sanchez, Santoro, A., Sznajder, A., Thiel, M., Manganote, E. J. Tonelli, Da Silva De Araujo, F. Torres, Pereira, A. Vilela, Ahuja, S., Bernardes, C. A., Tomei, T. R. Fernandez Perez, Gregores, E. M., Mercadante, P. G., Novaes, S. F., Padula, Sandra S., Abad, D. Romero, Vargas, J. C. Ruiz, Aleksandrov, A., Hadjiiska, R., Iaydjiev, P., Misheva, M., Rodozov, M., Shopova, M., Sultanov, G., Dimitrov, A., Litov, L., Pavlov, B., Petkov, P., Fang, W., Gao, X., Yuan, L., Ahmad, M., Bian, J. G., Chen, G. M., Chen, H. S., Chen, M., Chen, Y., Jiang, C. H., Leggat, D., Liao, H., Liu, Z., Romeo, F., Shaheen, S. M., Spiezia, A., Tao, J., Wang, C., Wang, Z., Yazgan, E., Zhang, H., Zhang, S., Zhao, J., Ban, Y., Chen, G., Li, J., Li, Q., Liu, S., Mao, Y., Qian, S. J., Wang, D., Xu, Z., Zhang, F., Wang, Y., Avila, C., Cabrera, A., Montoya, C. A. Carrillo, Sierra, L. F. Chaparro, Florez, C., Hernández, C. F. González, Alvarez, J. D. Ruiz, Delgado, M. A. Segura, Courbon, B., Godinovic, N., Lelas, D., Puljak, I., Cipriano, P. M. Ribeiro, Sculac, T., Antunovic, Z., Kovac, M., Brigljevic, V., Ferencek, D., Kadija, K., Mesic, B., Starodumov, A., Susa, T., Ather, M. W., Attikis, A., Mavromanolakis, G., Mousa, J., Nicolaou, C., Ptochos, F., Razis, P. A., Rykaczewski, H., Finger, M., Finger, Jr., M., Jarrin, E. Carrera, Mahmoud, M. A., Mohammed, Y., Salama, E., Dewanjee, R. K., Kadastik, M., Perrini, L., Raidal, M., Tiko, A., Veelken, C., Eerola, P., Kirschenmann, H., Pekkanen, J., Voutilainen, M., Havukainen, J., Heikkilä, J. K., Järvinen, T., Karimäki, V., Kinnunen, R., Lampén, T., Lassila-Perini, K., Laurila, S., Lehti, S., Lindén, T., Luukka, P., Siikonen, H., Tuominen, E., Tuominiemi, J., Tuuva, T., Besancon, M., Couderc, F., Dejardin, M., Denegri, D., Faure, J. L., Ferri, F., Ganjour, S., Ghosh, S., Gras, P., de Monchenault, G. Hamel, Jarry, P., Kucher, I., Leloup, C., Locci, E., Machet, M., Malcles, J., Negro, G., Rander, J., Rosowsky, A., Sahin, M.Ö., Titov, M., Abdulsalam, A., Amendola, C., Antropov, I., Baffioni, S., Beaudette, F., Busson, P., Cadamuro, L., Charlot, C., de Cassagnac, R. Granier, Jo, M., Lisniak, S., Lobanov, A., Blanco, J. Martin, Nguyen, M., Ochando, C., Ortona, G., Paganini, P., Pigard, P., Salerno, R., Sauvan, J. B., Sirois, Y., Leiton, A. G. Stahl, Strebler, T., Yilmaz, Y., Zabi, A., Zghiche, A., Agram, J.-L., Andrea, J., Bloch, D., Brom, J.-M., Buttignol, M., Chabert, E. C., Chanon, N., Collard, C., Conte, E., Coubez, X., Fontaine, J.-C., Gelé, D., Goerlach, U., Jansová, M., Bihan, A.-C. Le, Tonon, N., Hove, P. Van, Gadrat, S., Beauceron, S., Bernet, C., Boudoul, G., Chierici, R., Contardo, D., Depasse, P., Mamouni, H. El, Fay, J., Finco, L., Gascon, S., Gouzevitch, M., Grenier, G., Ille, B., Lagarde, F., Laktineh, I. B., Lethuillier, M., Mirabito, L., Pequegnot, A. L., Perries, S., Popov, A., Sordini, V., Donckt, M. Vander, Viret, S., Toriashvili, T., Tsamalaidze, Z., Autermann, C., Feld, L., Kiesel, M. 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T., Jensen, F., Johnson, A., Krohn, M., Leontsinis, S., Mulholland, T., Stenson, K., Wagner, S. R., Alexander, J., Chaves, J., Chu, J., Dittmer, S., Mcdermott, K., Mirman, N., Patterson, J. R., Quach, D., Rinkevicius, A., Ryd, A., Skinnari, L., Soffi, L., Tan, S. M., Tao, Z., Thom, J., Tucker, J., Wittich, P., Zientek, M., Abdullin, S., Albrow, M., Alyari, M., Apollinari, G., Apresyan, A., Apyan, A., Banerjee, S., Bauerdick, L. A. T., Beretvas, A., Berryhill, J., Bhat, P. C., Bolla, G., Burkett, K., Butler, J. N., Canepa, A., Cerati, G. B., Cheung, H. W. K., Chlebana, F., Cremonesi, M., Duarte, J., Elvira, V. D., Freeman, J., Gecse, Z., Gottschalk, E., Gray, L., Green, D., Grünendahl, S., Gutsche, O., Harris, R. M., Hasegawa, S., Hirschauer, J., Hu, Z., Jayatilaka, B., Jindariani, S., Johnson, M., Joshi, U., Klima, B., Kreis, B., Lammel, S., Lincoln, D., Lipton, R., Liu, M., Liu, T., De Sá, R. Lopes, Lykken, J., Maeshima, K., Magini, N., Marraffino, J. M., Mason, D., McBride, P., Merkel, P., Mrenna, S., Nahn, S., O’Dell, V., Pedro, K., Prokofyev, O., Rakness, G., Ristori, L., Schneider, B., Sexton-Kennedy, E., Soha, A., Spalding, W. J., Spiegel, L., Stoynev, S., Strait, J., Strobbe, N., Taylor, L., Tkaczyk, S., Tran, N. V., Uplegger, L., Vaandering, E. W., Vernieri, C., Verzocchi, M., Vidal, R., Wang, M., Weber, H. A., Whitbeck, A., Acosta, D., Avery, P., Bortignon, P., Bourilkov, D., Brinkerhoff, A., Carnes, A., Carver, M., Curry, D., Field, R. D., Furic, I. K., Gleyzer, S. V., Joshi, B. M., Konigsberg, J., Korytov, A., Kotov, K., Ma, P., Matchev, K., Mei, H., Mitselmakher, G., Shi, K., Sperka, D., Terentyev, N., Thomas, L., Wang, J., Wang, S., Yelton, J., Joshi, Y. R., Linn, S., Markowitz, P., Rodriguez, J. L., Ackert, A., Adams, T., Askew, A., Hagopian, S., Hagopian, V., Johnson, K. F., Kolberg, T., Martinez, G., Perry, T., Prosper, H., Saha, A., Santra, A., Sharma, V., Yohay, R., Baarmand, M. M., Bhopatkar, V., Colafranceschi, S., Hohlmann, M., Noonan, D., Roy, T., Yumiceva, F., Adams, M. R., Apanasevich, L., Berry, D., Betts, R. R., Cavanaugh, R., Chen, X., Evdokimov, O., Gerber, C. E., Hangal, D. A., Hofman, D. J., Jung, K., Kamin, J., Gonzalez, I. D. Sandoval, Tonjes, M. B., Trauger, H., Varelas, N., Wang, H., Wu, Z., Zhang, J., Bilki, B., Clarida, W., Dilsiz, K., Durgut, S., Gandrajula, R. P., Haytmyradov, M., Khristenko, V., Merlo, J.-P., Mermerkaya, H., Mestvirishvili, A., Moeller, A., Nachtman, J., Ogul, H., Onel, Y., Ozok, F., Penzo, A., Snyder, C., Tiras, E., Wetzel, J., Yi, K., Blumenfeld, B., Cocoros, A., Eminizer, N., Fehling, D., Feng, L., Gritsan, A. V., Maksimovic, P., Roskes, J., Sarica, U., Swartz, M., Xiao, M., You, C., Al-bataineh, A., Baringer, P., Bean, A., Boren, S., Bowen, J., Castle, J., Khalil, S., Kropivnitskaya, A., Majumder, D., Mcbrayer, W., Murray, M., Royon, C., Sanders, S., Schmitz, E., Takaki, J. D. Tapia, Wang, Q., Ivanov, A., Kaadze, K., Maravin, Y., Mohammadi, A., Saini, L. K., Skhirtladze, N., Rebassoo, F., Wright, D., Anelli, C., Baden, A., Baron, O., Belloni, A., Eno, S. C., Feng, Y., Ferraioli, C., Hadley, N. J., Jabeen, S., Jeng, G. Y., Kellogg, R. G., Kunkle, J., Mignerey, A. C., Ricci-Tam, F., Shin, Y. H., Skuja, A., Tonwar, S. C., Abercrombie, D., Allen, B., Azzolini, V., Barbieri, R., Baty, A., Bi, R., Brandt, S., Busza, W., Cali, I. A., D’Alfonso, M., Demiragli, Z., Ceballos, G. Gomez, Goncharov, M., Hsu, D., Hu, M., Iiyama, Y., Innocenti, G. M., Klute, M., Kovalskyi, D., Lee, Y.-J., Levin, A., Luckey, P. D., Maier, B., Marini, A. C., Mcginn, C., Mironov, C., Narayanan, S., Niu, X., Paus, C., Roland, C., Roland, G., Salfeld-Nebgen, J., Stephans, G. S. F., Tatar, K., Velicanu, D., Wang, J., Wang, T. W., Wyslouch, B., Benvenuti, A. C., Chatterjee, R. M., Evans, A., Hansen, P., Hiltbrand, J., Kalafut, S., Kubota, Y., Lesko, Z., Mans, J., Nourbakhsh, S., Ruckstuhl, N., Rusack, R., Turkewitz, J., Wadud, M. A., Acosta, J. G., Oliveros, S., Avdeeva, E., Bloom, K., Claes, D. R., Fangmeier, C., Golf, F., Suarez, R. Gonzalez, Kamalieddin, R., Kravchenko, I., Monroy, J., Siado, J. E., Snow, G. R., Stieger, B., Dolen, J., Godshalk, A., Harrington, C., Iashvili, I., Nguyen, D., Parker, A., Rappoccio, S., Roozbahani, B., Alverson, G., Barberis, E., Freer, C., Hortiangtham, A., Massironi, A., Morse, D. M., Orimoto, T., De Lima, R. Teixeira, Trocino, D., Wamorkar, T., Wang, B., Wisecarver, A., Wood, D., Bhattacharya, S., Charaf, O., Hahn, K. A., Mucia, N., Odell, N., Schmitt, M. H., Sung, K., Trovato, M., Velasco, M., Bucci, R., Dev, N., Hildreth, M., Anampa, K. Hurtado, Jessop, C., Karmgard, D. J., Kellams, N., Lannon, K., Li, W., Loukas, N., Marinelli, N., Meng, F., Mueller, C., Musienko, Y., Planer, M., Reinsvold, A., Ruchti, R., Siddireddy, P., Smith, G., Taroni, S., Wayne, M., Wightman, A., Wolf, M., Woodard, A., Alimena, J., Antonelli, L., Bylsma, B., Durkin, L. S., Flowers, S., Francis, B., Hart, A., Hill, C., Ji, W., Liu, B., Luo, W., Winer, B. L., Wulsin, H. W., Cooperstein, S., Driga, O., Elmer, P., Hardenbrook, J., Hebda, P., Higginbotham, S., Kalogeropoulos, A., Lange, D., Luo, J., Marlow, D., Mei, K., Ojalvo, I., Olsen, J., Palmer, C., Piroué, P., Stickland, D., Tully, C., Malik, S., Norberg, S., Barker, A., Barnes, V. E., Das, S., Folgueras, S., Gutay, L., Jha, M. K., Jones, M., Jung, A. W., Khatiwada, A., Miller, D. H., Neumeister, N., Peng, C. C., Qiu, H., Schulte, J. F., Sun, J., Wang, F., Xiao, R., Xie, W., Cheng, T., Parashar, N., Stupak, J., Chen, Z., Ecklund, K. M., Freed, S., Geurts, F. J. M., Guilbaud, M., Kilpatrick, M., Li, W., Michlin, B., Padley, B. P., Roberts, J., Rorie, J., Shi, W., Tu, Z., Zabel, J., Zhang, A., Bodek, A., de Barbaro, P., Demina, R., Duh, Y. t., Ferbel, T., Galanti, M., Garcia-Bellido, A., Han, J., Hindrichs, O., Khukhunaishvili, A., Lo, K. H., Tan, P., Verzetti, M., Ciesielski, R., Goulianos, K., Mesropian, C., Agapitos, A., Chou, J. P., Gershtein, Y., Espinosa, T. A. Gómez, Halkiadakis, E., Heindl, M., Hughes, E., Kaplan, S., Elayavalli, R. Kunnawalkam, Kyriacou, S., Lath, A., Montalvo, R., Nash, K., Osherson, M., Saka, H., Salur, S., Schnetzer, S., Sheffield, D., Somalwar, S., Stone, R., Thomas, S., Thomassen, P., Walker, M., Delannoy, A. G., Heideman, J., Riley, G., Rose, K., Spanier, S., Thapa, K., Bouhali, O., Hernandez, A. Castaneda, Celik, A., Dalchenko, M., De Mattia, M., Delgado, A., Dildick, S., Eusebi, R., Gilmore, J., Huang, T., Kamon, T., Mueller, R., Pakhotin, Y., Patel, R., Perloff, A., Perniè, L., Rathjens, D., Safonov, A., Tatarinov, A., Ulmer, K. A., Akchurin, N., Damgov, J., De Guio, F., Dudero, P. R., Faulkner, J., Gurpinar, E., Kunori, S., Lamichhane, K., Lee, S. W., Libeiro, T., Mengke, T., Muthumuni, S., Peltola, T., Undleeb, S., Volobouev, I., Wang, Z., Greene, S., Gurrola, A., Janjam, R., Johns, W., Maguire, C., Melo, A., Ni, H., Padeken, K., Sheldon, P., Tuo, S., Velkovska, J., Xu, Q., Arenton, M. W., Barria, P., Cox, B., Hirosky, R., Joyce, M., Ledovskoy, A., Li, H., Neu, C., Sinthuprasith, T., Wang, Y., Wolfe, E., Xia, F., Harr, R., Karchin, P. E., Poudyal, N., Sturdy, J., Thapa, P., Zaleski, S., Brodski, M., Buchanan, J., Caillol, C., Dasu, S., Dodd, L., Duric, S., Gomber, B., Grothe, M., Herndon, M., Hervé, A., Hussain, U., Klabbers, P., Lanaro, A., Levine, A., Long, K., Loveless, R., Ruggles, T., Savin, A., Smith, N., Smith, W. H., Taylor, D., and Woods, N.
Published: 2023
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17. Measurement of exclusive Υ photoproduction from protons in p Pb collisions at s NN = 5.02 TeV.

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Del Valle, A Escalante, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Pieters, M, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Zeid, S Abu, Blekman, F, D'Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Seva, T, Starling, E, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Trocino, D, Tytgat, M, Verbeke, W, Vermassen, B, Vit, M, Zaganidis, N, and Bakhshiansohi, H
Subjects: CMS Collaboration, CMS, UPC, Y, pPb, photoproduction, Rare Diseases, hep-ex, Nuclear & Particles Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics
Abstract: The exclusive photoproduction of Υ ( nS ) meson states from protons, γ p → Υ ( nS ) p (with n = 1 , 2 , 3 ), is studied in ultraperipheral p Pb collisions at a centre-of-mass energy per nucleon pair of s NN = 5.02 TeV . The measurement is performed using the Υ ( nS ) → μ + μ - decay mode, with data collected by the CMS experiment corresponding to an integrated luminosity of 32.6 nb - 1 . Differential cross sections as functions of the Υ ( nS ) transverse momentum squared p T 2 , and rapidity y, are presented. The Υ ( 1 S ) photoproduction cross section is extracted in the rapidity range | y | < 2.2 , which corresponds to photon-proton centre-of-mass energies in the range 91 < W γ p < 826 GeV . The data are compared to theoretical predictions based on perturbative quantum chromodynamics and to previous measurements.
Published: 2019

18. Measurement of the top quark mass with lepton+jets final states using pp collisions at s=13TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Del Valle, A Escalante, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hrubec, J, Jeitler, M, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Pieters, M, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Zeid, S Abu, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Seva, T, Starling, E, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Trocino, D, Tytgat, M, Verbeke, W, Vermassen, B, Vit, M, Zaganidis, N, Bakhshiansohi, H, Bondu, O, Brochet, S, and Bruno, G
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: The mass of the top quark is measured using a sample of tt¯ events collected by the CMS detector using proton-proton collisions at s=13 TeV at the CERN LHC. Events are selected with one isolated muon or electron and at least four jets from data corresponding to an integrated luminosity of 35.9 fb-1 . For each event the mass is reconstructed from a kinematic fit of the decay products to a tt¯ hypothesis. Using the ideogram method, the top quark mass is determined simultaneously with an overall jet energy scale factor (JSF), constrained by the mass of the W boson in qq¯' decays. The measurement is calibrated on samples simulated at next-to-leading order matched to a leading-order parton shower. The top quark mass is found to be 172.25±0.08(stat+JSF)±0.62(syst)GeV . The dependence of this result on the kinematic properties of the event is studied and compared to predictions of different models of tt¯ production, and no indications of a bias in the measurements are observed.
Published: 2018

19. Measurement of differential cross sections for Z boson production in association with jets in proton-proton collisions at s=13TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Del Valle, A Escalante, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hrubec, J, Jeitler, M, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Pieters, M, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Zeid, S Abu, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Seva, T, Starling, E, Velde, C Vander, Vanlaer, P, Vannerom, D, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Trocino, D, Tytgat, M, Verbeke, W, Vermassen, B, Vit, M, Zaganidis, N, Bakhshiansohi, H, Bondu, O, Brochet, S, Bruno, G, and Caputo, C
Subjects: CMS, Physics, Standard model, Cross section, Z boson, Jets, Proton, LHC, Publications Committee CMS_Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: The production of a Z boson, decaying to two charged leptons, in association with jets in proton-proton collisions at a centre-of-mass energy of 13 TeV is measured. Data recorded with the CMS detector at the LHC are used that correspond to an integrated luminosity of 2.19 fb-1 . The cross section is measured as a function of the jet multiplicity and its dependence on the transverse momentum of the Z boson, the jet kinematic variables (transverse momentum and rapidity), the scalar sum of the jet momenta, which quantifies the hadronic activity, and the balance in transverse momentum between the reconstructed jet recoil and the Z boson. The measurements are compared with predictions from four different calculations. The first two merge matrix elements with different parton multiplicities in the final state and parton showering, one of which includes one-loop corrections. The third is a fixed-order calculation with next-to-next-to-leading order accuracy for the process with a Z boson and one parton in the final state. The fourth combines the fully differential next-to-next-to-leading order calculation of the process with no parton in the final state with next-to-next-to-leading logarithm resummation and parton showering.
Published: 2018

20. Search for third-generation scalar leptoquarks decaying to a top quark and a τ lepton at s=13Te

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Del Valle, A Escalante, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Pieters, M, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Zeid, S Abu, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Maerschalk, T, Seva, T, Starling, E, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Trocino, D, Tytgat, M, Verbeke, W, Vit, M, and Zaganidis, N
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A search for pair production of heavy scalar leptoquarks (LQs), each decaying into a top quark and a τ lepton, is presented. The search considers final states with an electron or a muon, one or two τ leptons that decayed to hadrons, and additional jets. The data were collected in 2016 in proton-proton collisions at s=13Te with the CMS detector at the LHC, and correspond to an integrated luminosity of 35.9 fb-1 . No evidence for pair production of LQs is found. Assuming a branching fraction of unity for the decay LQ→tτ , upper limits on the production cross section are set as a function of LQ mass, excluding masses below 900 Ge at 95% confidence level. These results provide the most stringent limits to date on the production of scalar LQs that decay to a top quark and a τ lepton.
Published: 2018

21. Measurement of the Z/γ∗→ττ cross section in pp collisions at s=13TeV and validation of τ lepton analysis techniques

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Del Valle, A Escalante, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Zeid, S Abu, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Seva, T, Starling, E, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Salva, S, Trocino, D, Tytgat, M, Verbeke, W, and Zaganidis, N
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A measurement is presented of the Z/γ∗→ττ cross section in pp collisions at s=13TeV , using data recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 2.3fb-1 . The product of the inclusive cross section and branching fraction is measured to be σ(pp→Z/γ∗+X)B(Z/γ∗→ττ)=1848±12(stat)±67(syst \,+\,lumi) pb , in agreement with the standard model expectation, computed at next-to-next-to-leading order accuracy in perturbative quantum chromodynamics. The measurement is used to validate new analysis techniques relevant for future measurements of τ lepton production. The measurement also provides the reconstruction efficiency and energy scale for τ decays to hadrons +ντ final states, determined with respective relative uncertainties of 2.2 and 0.9%.
Published: 2018

22. Search for new physics in dijet angular distributions using proton–proton collisions at s=13TeV and constraints on dark matter and other models

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Del Valle, A Escalante, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Pieters, M, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Zeid, S Abu, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Seva, T, Starling, E, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Trocino, D, Tytgat, M, Verbeke, W, Vermassen, B, Vit, M, Zaganidis, N, and Bakhshiansohi, H
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A search is presented for physics beyond the standard model, based on measurements of dijet angular distributions in proton-proton collisions at s=13TeV . The data collected with the CMS detector at the LHC correspond to an integrated luminosity of 35.9 fb-1 . The observed distributions, corrected to particle level, are found to be in agreement with predictions from perturbative quantum chromodynamics that include electroweak corrections. Constraints are placed on models containing quark contact interactions, extra spatial dimensions, quantum black holes, or dark matter, using the detector-level distributions. In a benchmark model where only left-handed quarks participate, contact interactions are excluded at the 95% confidence level up to a scale of 12.8 or 17.5TeV, for destructive or constructive interference, respectively. The most stringent lower limits to date are set on the ultraviolet cutoff in the Arkani-Hamed-Dimopoulos-Dvali model of extra dimensions. In the Giudice-Rattazzi-Wells convention, the cutoff scale is excluded up to 10.1TeV. The production of quantum black holes is excluded for masses below 5.9 and 8.2TeV, depending on the model. For the first time, lower limits between 2.0 and 4.6TeVare set on the mass of a dark matter mediator for (axial-)vector mediators, for the universal quark coupling gq=1.0 .
Published: 2018

23. Measurement of b hadron lifetimes in pp collisions at s=8TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Dydyshka, Y, Mossolov, V, Suarez Gonzalez, J, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Abu Zeid, S, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Salva, S, Tytgat, M, Verbeke, W, Zaganidis, N, Bakhshiansohi, H, Bondu, O, Brochet, S, and Bruno, G
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: Measurements are presented of the lifetimes of the B0 , Bs0 , Λb0 , and Bc+ hadrons using the decay channels B0→J/ψK∗(892)0 , B0→J/ψKS0 , Bs0→J/ψπ+π- , Bs0→J/ψϕ(1020) , Λb0→J/ψΛ0 , and Bc+→J/ψπ+ . The data sample, corresponding to an integrated luminosity of 19.7 fb-1 , was collected by the CMS detector at the LHC in proton-proton collisions at s=8TeV . The B0 lifetime is measured to be 453.0±1.6(stat)±1.8(syst)μm in J/ψK∗(892)0 and 457.8±2.7(stat)±2.8(syst)μm in J/ψKS0 , which results in a combined measurement of cτB0=454.1±1.4(stat)±1.7(syst)μm . The effective lifetime of the Bs0 meson is measured in two decay modes, with contributions from different amounts of the heavy and light eigenstates. This results in two different measured lifetimes: cτBs0→J/ψπ+π-=502.7±10.2(stat)±3.4(syst)μm and cτBs0→J/ψϕ(1020)=443.9±2.0(stat)±1.5(syst)μm . The Λb0 lifetime is found to be 442.9±8.2(stat)±2.8(syst)μm . The precision from each of these channels is as good as or better than previous measurements. The Bc+ lifetime, measured with respect to the B+ to reduce the systematic uncertainty, is 162.3±7.8(stat)±4.2(syst)±0.1(τB+)μm . All results are in agreement with current world-average values.
Published: 2018

24. Measurement of prompt and nonprompt charmonium suppression in PbPb collisions at 5.02TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Del Valle, A Escalante, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Abu Zeid, S, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Seva, T, Starling, E, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Salva, S, Tytgat, M, Verbeke, W, Zaganidis, N, Bakhshiansohi, H, and Bondu, O
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, CMS Collaboration, nucl-ex, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract: The nuclear modification factors of J/ψ and ψ(2S) mesons are measured in PbPb collisions at a centre-of-mass energy per nucleon pair of sNN=5.02TeV . The analysis is based on PbPb and pp data samples collected by CMS at the LHC in 2015, corresponding to integrated luminosities of 464 μb-1 and 28 pb-1 , respectively. The measurements are performed in the dimuon rapidity range of |y|25 GeV/c is seen with respect to that observed at intermediate pT . The prompt ψ(2S) meson yield is found to be more suppressed than that of the prompt J/ψ mesons in the entire pT range.
Published: 2018

25. Measurement of the associated production of a single top quark and a Z boson in pp collisions at s=13TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Escalante Del Valle, A, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, CE, Zarucki, M, Chekhovsky, V, Mossolov, V, Suarez Gonzalez, J, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Abu Zeid, S, Blekman, F, D'Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Seva, T, Starling, E, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Salva, S, Trocino, D, Tytgat, M, Verbeke, W, and Vit, M
Subjects: SM, Single top, Cross section, tZq, hep-ex, Nuclear & Particles Physics, Mathematical Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: A measurement is presented of the associated production of a single top quark and a Z boson. The study uses data from proton–proton collisions at s=13TeV recorded by the CMS experiment, corresponding to an integrated luminosity of 35.9 fb−1. Using final states with three leptons (electrons or muons), the tZq production cross section is measured to be σ(pp→tZq→Wbℓ+ℓ−q)=123−31+33(stat)−23+29(syst)fb, where ℓ stands for electrons, muons, or τ leptons, with observed and expected significances of 3.7 and 3.1 standard deviations, respectively.
Published: 2018

26. Measurement of the associated production of a single top quark and a Z boson in pp collisions at s = 13 TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Del Valle, A Escalante, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Abu Zeid, S, Blekman, F, D'Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Seva, T, Starling, E, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Salva, S, Trocino, D, Tytgat, M, Verbeke, W, and Vit, M
Subjects: SM, Single top, Cross section, tZq, hep-ex, Mathematical Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics
Abstract: A measurement is presented of the associated production of a single top quark and a Z boson. The study uses data from proton–proton collisions at s=13TeV recorded by the CMS experiment, corresponding to an integrated luminosity of 35.9 fb−1. Using final states with three leptons (electrons or muons), the tZq production cross section is measured to be σ(pp→tZq→Wbℓ+ℓ−q)=123−31+33(stat)−23+29(syst)fb, where ℓ stands for electrons, muons, or τ leptons, with observed and expected significances of 3.7 and 3.1 standard deviations, respectively.
Published: 2018

27. Measurement of associated Z + charm production in proton–proton collisions at s=8TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Madlener, T, Matsushita, T, Mikulec, I, Pree, E, Rabady, D, Rad, N, Rohringer, H, Schieck, J, Spanring, M, Spitzbart, D, Strauss, J, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, Shumeiko, N, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Zeid, S Abu, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Salva, S, Schöfbeck, R, Tytgat, M, Van Driessche, W, Verbeke, W, Zaganidis, N, and Bakhshiansohi, H
Subjects: CMS Collaboration, CMS, Heavy flavour, Physics, SMP, Standard model physics, Vector boson, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A study of the associated production of a Z boson and a charm quark jet ( Z+c ), and a comparison to production with a b quark jet ( Z+b ), in pp collisions at a centre-of-mass energy of 8 TeV are presented. The analysis uses a data sample corresponding to an integrated luminosity of 19.7 fb-1 , collected with the CMS detector at the CERN LHC. The Z boson candidates are identified through their decays into pairs of electrons or muons. Jets originating from heavy flavour quarks are identified using semileptonic decays of c or b flavoured hadrons and hadronic decays of charm hadrons. The measurements are performed in the kinematic region with two leptons with pTℓ>20GeV , |ηℓ|
Published: 2018

28. Search for new physics in events with a leptonically decaying Z boson and a large transverse momentum imbalance in proton–proton collisions at s = 13TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Del Valle, A Escalante, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Abu Zeid, S, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Seva, T, Starling, E, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Salva, S, Tytgat, M, Verbeke, W, Zaganidis, N, Bakhshiansohi, H, and Bondu, O
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A search for new physics in events with a Z boson produced in association with large missing transverse momentum at the LHC is presented. The search is based on the 2016 data sample of proton-proton collisions recorded with the CMS experiment at s=13TeV , corresponding to an integrated luminosity of 35.9 fb-1 . The results of this search are interpreted in terms of a simplified model of dark matter production via spin-0 or spin-1 mediators, a scenario with a standard-model-like Higgs boson produced in association with the Z boson and decaying invisibly, a model of unparticle production, and a model with large extra spatial dimensions. No significant deviations from the background expectations are found, and limits are set on relevant model parameters, significantly extending the results previously achieved in this channel.
Published: 2018

29. Study of dijet events with a large rapidity gap between the two leading jets in pp collisions at s=7TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Waltenberger, W, Wulz, C-E, Dvornikov, O, Makarenko, V, Mossolov, V, Suarez Gonzalez, J, Zykunov, V, Shumeiko, N, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Abu Zeid, S, Blekman, F, D’Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Salva, S, Schöfbeck, R, Tytgat, M, Van Driessche, W, Yazgan, E, Zaganidis, N, Bakhshiansohi, H, Beluffi, C, Bondu, O, and Brochet, S
Subjects: CMS Collaboration, CMS, Diffraction, Physics, QCD, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: Events with no charged particles produced between the two leading jets are studied in proton-proton collisions at s=7 TeV . The jets were required to have transverse momentum pTjet>40 GeV and pseudorapidity 1.50.2 GeV in the interval -1
Published: 2018

30. Measurements of the pp→ZZ production cross section and the Z→4ℓ branching fraction, and constraints on anomalous triple gauge couplings at s=13TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rabady, D, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Zeid, S Abu, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Salva, S, Tytgat, M, Verbeke, W, Zaganidis, N, Bakhshiansohi, H, Bondu, O, Brochet, S, and Bruno, G
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: Four-lepton production in proton-proton collisions, pp→(Z/γ∗)(Z/γ∗)→4ℓ , where ℓ=e or μ , is studied at a center-of-mass energy of 13 TeV with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb-1 . The ZZ production cross section, σ(pp→ZZ)=17.2±0.5(stat)±0.7(syst)±0.4(theo)±0.4(lumi) pb , measured using events with two opposite-sign, same-flavor lepton pairs produced in the mass region 604GeV for all opposite-sign, same-flavor lepton pairs. The results agree with standard model predictions. The invariant mass distribution of the four-lepton system is used to set limits on anomalous ZZZ and ZZ γ couplings at 95% confidence level: -0.0012
Published: 2018

31. Erratum to: Searches for long-lived charged particles in pp collisions at s = 7 and 8 TeV

Author: Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Erö, J., Fabjan, C., Friedl, M., Frühwirth, R., Ghete, V. M., Hörmann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., Knünz, V., Krammer, M., Krätschmer, I., Liko, D., Mikulec, I., Rabady, D., Rahbaran, B., Rohringer, C., Rohringer, H., Schöfbeck, R., Strauss, J., Taurok, A., Treberer-Treberspurg, W., Waltenberger, W., Wulz, C.-E., Mossolov, V., Shumeiko, N., Suarez Gonzalez, J., Alderweireldt, S., Bansal, M., Bansal, S., Cornelis, T., De Wolf, E. A., Janssen, X., Knutsson, A., Luyckx, S., Mucibello, L., Ochesanu, S., Roland, B., Rougny, R., Van Haevermaet, H., Van Mechelen, P., Van Remortel, N., Van Spilbeeck, A., Blekman, F., Blyweert, S., D’Hondt, J., Kalogeropoulos, A., Keaveney, J., Maes, M., Olbrechts, A., Tavernier, S., Van Doninck, W., Van Mulders, P., Van Onsem, G. P., Villella, I., Clerbaux, B., De Lentdecker, G., Favart, L., Gay, A. P. R., Hreus, T., Léonard, A., Marage, P. E., Mohammadi, A., Perniè, L., Reis, T., Seva, T., Thomas, L., Vander Velde, C., Vanlaer, P., Wang, J., Adler, V., Beernaert, K., Benucci, L., Cimmino, A., Costantini, S., Dildick, S., Garcia, G., Klein, B., Lellouch, J., Marinov, A., Mccartin, J., Ocampo Rios, A. A., Ryckbosch, D., Sigamani, M., Strobbe, N., Thyssen, F., Tytgat, M., Walsh, S., Yazgan, E., Zaganidis, N., Basegmez, S., Beluffi, C., Bruno, G., Castello, R., Caudron, A., Ceard, L., Delaere, C., du Pree, T., Favart, D., Forthomme, L., Giammanco, A., Hollar, J., Jez, P., Lemaitre, V., Liao, J., Militaru, O., Nuttens, C., Pagano, D., Pin, A., Piotrzkowski, K., Popov, A., Selvaggi, M., Vizan Garcia, J. M., Beliy, N., Caebergs, T., Daubie, E., Hammad, G. H., Alves, G. A., Correa Martins Junior, M., Martins, T., Pol, M. E., Souza, M. H. G., Aldá Júnior, W. L., Carvalho, W., Chinellato, J., Custódio, A., Da Costa, E. M., De Jesus Damiao, D., De Oliveira Martins, C., Fonseca De Souza, S., Malbouisson, H., Malek, M., Matos Figueiredo, D., Mundim, L., Nogima, H., Prado Da Silva, W. L., Santoro, A., Sznajder, A., Tonelli Manganote, E. J., Vilela Pereira, A., Bernardes, C. A., Dias, F. A., Fernandez Perez Tomei, T. R., Gregores, E. M., Lagana, C., Marinho, F., Mercadante, P. G., Novaes, S. F., Padula, Sandra S., Genchev, V., Iaydjiev, P., Piperov, S., Rodozov, M., Sultanov, G., Vutova, M., Dimitrov, A., Hadjiiska, R., Kozhuharov, V., Litov, L., Pavlov, B., Petkov, P., Bian, J. G., Chen, G. M., Chen, H. S., Jiang, C. H., Liang, D., Liang, S., Meng, X., Tao, J., Wang, J., Wang, X., Wang, Z., Xiao, H., Xu, M., Asawatangtrakuldee, C., Ban, Y., Guo, Y., Li, W., Liu, S., Mao, Y., Qian, S. J., Teng, H., Wang, D., Zhang, L., Zou, W., Avila, C., Carrillo Montoya, C. A., Gomez, J. P., Gomez Moreno, B., Sanabria, J. 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R., Jeong, C., Kovitanggoon, K., Lee, S. W., Libeiro, T., Volobouev, I., Appelt, E., Delannoy, A. G., Greene, S., Gurrola, A., Johns, W., Maguire, C., Mao, Y., Melo, A., Sharma, M., Sheldon, P., Snook, B., Tuo, S., Velkovska, J., Arenton, M. W., Boutle, S., Cox, B., Francis, B., Goodell, J., Hirosky, R., Ledovskoy, A., Lin, C., Neu, C., Wood, J., Gollapinni, S., Harr, R., Karchin, P. E., Kottachchi Kankanamge Don, C., Lamichhane, P., Sakharov, A., Anderson, M., Belknap, D. A., Borrello, L., Carlsmith, D., Cepeda, M., Dasu, S., Friis, E., Grogg, K. S., Grothe, M., Hall-Wilton, R., Herndon, M., Hervé, A., Kaadze, K., Klabbers, P., Klukas, J., Lanaro, A., Lazaridis, C., Loveless, R., Mohapatra, A., Mozer, M. U., Ojalvo, I., Pierro, G. A., Ross, I., Savin, A., Smith, W. H., and Swanson, J.
Published: 2022
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32. Spectroscopy of the neutron-rich hypernucleus $^{7}_{\Lambda}$He from electron scattering

Author: Gogami, T., Chen, C., Kawama, D., Achenbach, P., Ahmidouch, A., Albayrak, I., Androic, D., Asaturyan, A., Asaturyan, R., Ates, O., Baturin, P., Badui, R., Boeglin, W., Bono, J., Brash, E., Carter, P., Chiba, A., Christy, E., Danagoulian, S., De Leo, R., Doi, D., Elaasar, M., Ent, R., Fujii, Y., Fujita, M., Furic, M., Gabrielyan, M., Gan, L., Garibaldi, F., Gaskell, D., Gasparian, A., Han, Y., Hashimoto, O., Horn, T., Hu, B., Hungerford, Ed. V., Jones, M., Kanda, H., Kaneta, M., Kato, S., Kawai, M., Khanal, H., Kohl, M., Liyanage, A., Luo, W., Maeda, K., Margaryan, A., Markowitz, P., Maruta, T., Matsumura, A., Maxwell, V., Mkrtchyan, A., Mkrtchyan, H., Nagao, S., Nakamura, S. N., Narayan, A., Neville, C., Niculescu, G., Niculescu, M. I., Nunez, A., Nuruzzaman, Okayasu, Y., Petkovic, T., Pochodzalla, J., Qiu, X., Reinhold, J., Rodriguez, V. M., Samanta, C., Sawatzky, B., Seva, T., Shichijo, A., Tadevosyan, V., Tang, L., Taniya, N., Tsukada, K., Veilleux, M., Vulcan, W., Wesselmann, F. R., Wood, S. A., Yamamoto, T., Ya, L., Ye, Z., Yokota, K., Yuan, L., Zhamkochyan, S., and Zhu, L.
Subjects: Nuclear Experiment, Nuclear Theory
Abstract: The missing mass spectroscopy of the $^{7}_{\Lambda}$He hypernucleus was performed, using the $^{7}$Li$(e,e^{\prime}K^{+})^{7}_{\Lambda}$He reaction at the Thomas Jefferson National Accelerator Facility Hall C. The $\Lambda$ binding energy of the ground state (1/2$^{+}$) was determined with a smaller error than that of the previous measurement, being $B_{\Lambda}$ = 5.55 $\pm$ 0.10(stat.) $\pm$ 0.11(sys.) MeV. The experiment also provided new insight into charge symmetry breaking in p-shell hypernuclear systems. Finally, a peak at $B_{\Lambda}$ = 3.65 $\pm$ 0.20(stat.) $\pm$ 0.11(sys.) MeV was observed and assigned as a mixture of 3/2$^{+}$ and 5/2$^{+}$ states, confirming the "gluelike" behavior of $\Lambda$, which makes an unstable state in $^{6}$He stable against neutron emission., Comment: 6 pages, 4 figures
Published: 2016
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33. Combination of inclusive and differential tt¯ charge asymmetry measurements using ATLAS and CMS data at √s = 7 and 8 TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Escalante Del Valle, A, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, CE, Zarucki, M, Chekhovsky, V, Mossolov, V, Suarez Gonzalez, J, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Abu Zeid, S, Blekman, F, D’hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Seva, T, Starling, E, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Salva, S, Tytgat, M, Verbeke, W, Zaganidis, N, and Bakhshiansohi, H
Subjects: Mathematical Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Mathematical physics, Nuclear and plasma physics, Particle and high energy physics
Abstract: This paper presents combinations of inclusive and differential measurements of the charge asymmetry (AC) in top quark pair (tt) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at centreof- mass energies of 7 and 8TeV. The data correspond to integrated luminosities of about 5 and 20 fb–1for each experiment, respectively. The resulting combined LHC measurements of the inclusive charge asymmetry are ACLHC7= 0:005±0:007 (stat) ±0:006 (syst) at 7TeV and ACLHC7= 0:0055 ± 0:0023 (stat) ± 0:0025 (syst) at 8TeV. These values, as well as the combination of AC measurements as a function of the invariant mass of the [formula presented] system at 8TeV, are consistent with the respective standard model predictions.
Published: 2018

34. Measurement of the top quark mass with lepton+jets final states using p p collisions at s=13TeV.

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Del Valle, A Escalante, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hrubec, J, Jeitler, M, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Taurok, A, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Pieters, M, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Zeid, S Abu, Blekman, F, D'Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Marchesini, I, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Bilin, B, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Dorney, B, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Kalsi, AK, Lenzi, T, Luetic, J, Seva, T, Starling, E, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Trocino, D, Tytgat, M, Verbeke, W, Vermassen, B, Vit, M, Zaganidis, N, Bakhshiansohi, H, Bondu, O, Brochet, S, and Bruno, G
Subjects: CMS Collaboration, hep-ex, Nuclear & Particles Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics
Abstract: The mass of the top quark is measured using a sample of tt¯ events collected by the CMS detector using proton-proton collisions at s=13 TeV at the CERN LHC. Events are selected with one isolated muon or electron and at least four jets from data corresponding to an integrated luminosity of 35.9 fb-1 . For each event the mass is reconstructed from a kinematic fit of the decay products to a tt¯ hypothesis. Using the ideogram method, the top quark mass is determined simultaneously with an overall jet energy scale factor (JSF), constrained by the mass of the W boson in qq¯' decays. The measurement is calibrated on samples simulated at next-to-leading order matched to a leading-order parton shower. The top quark mass is found to be 172.25±0.08(stat+JSF)±0.62(syst)GeV . The dependence of this result on the kinematic properties of the event is studied and compared to predictions of different models of tt¯ production, and no indications of a bias in the measurements are observed.
Published: 2018

35. Search for dark matter produced in association with heavy-flavor quark pairs in proton-proton collisions at s=13TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Waltenberger, W, Wulz, C-E, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, Shumeiko, N, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Zeid, S Abu, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Salva, S, Schöfbeck, R, Tytgat, M, Van Driessche, W, Verbeke, W, Zaganidis, N, Bakhshiansohi, H, Bondu, O, Brochet, S, Bruno, G, Caudron, A, De Visscher, S, and Delaere, C
Subjects: CMS Collaboration, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A search is presented for an excess of events with heavy-flavor quark pairs ( tt¯ and bb¯ ) and a large imbalance in transverse momentum in data from proton-proton collisions at a center-of-mass energy of 13 TeV . The data correspond to an integrated luminosity of 2.2 fb-1 collected with the CMS detector at the CERN LHC. No deviations are observed with respect to standard model predictions. The results are used in the first interpretation of dark matter production in tt¯ and bb¯ final states in a simplified model. This analysis is also the first to perform a statistical combination of searches for dark matter produced with different heavy-flavor final states. The combination provides exclusions that are stronger than those achieved with individual heavy-flavor final states.
Published: 2017

36. Measurement of the triple-differential dijet cross section in proton-proton collisions at s=8TeV and constraints on parton distribution functions

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Waltenberger, W, Wulz, C-E, Dvornikov, O, Makarenko, V, Mossolov, V, Suarez Gonzalez, J, Zykunov, V, Shumeiko, N, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Zeid, S Abu, Blekman, F, D’Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Salva, S, Schöfbeck, R, Tytgat, M, Van Driessche, W, Zaganidis, N, Bakhshiansohi, H, Bondu, O, Brochet, S, Bruno, G, Caudron, A, and De Visscher, S
Subjects: CMS Collaboration, CMS, Jets, PDF, Physics, QCD, Strong coupling constant, alpha-s, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A measurement is presented of the triple-differential dijet cross section at a centre-of-mass energy of 8 TeV using 19.7 fb-1 of data collected with the CMS detector in proton-proton collisions at the LHC. The cross section is measured as a function of the average transverse momentum, half the rapidity separation, and the boost of the two leading jets in the event. The cross section is corrected for detector effects and compared to calculations in perturbative quantum chromodynamics at next-to-leading order accuracy, complemented with electroweak and nonperturbative corrections. New constraints on parton distribution functions are obtained and the inferred value of the strong coupling constant is αS(MZ)=0.1199±0.0015(exp)-0.0020+0.0031(theo) , where MZ is the mass of the Z boson.
Published: 2017

37. Measurements of the associated production of a Z boson and b jets in pp collisions at s=8TeV

Author: Khachatryan, V, Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krammer, M, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Treberer-Treberspurg, W, Waltenberger, W, Wulz, C-E, Mossolov, V, Shumeiko, N, Suarez Gonzalez, J, Alderweireldt, S, Cornelis, T, De Wolf, EA, Janssen, X, Knutsson, A, Lauwers, J, Luyckx, S, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Abu Zeid, S, Blekman, F, D’Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Heracleous, N, Keaveney, J, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Strom, D, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Caillol, C, Clerbaux, B, De Lentdecker, G, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Velde, C Vander, Vanlaer, P, Yonamine, R, Zenoni, F, Zhang, F, Benucci, L, Cimmino, A, Crucy, S, Dobur, D, Fagot, A, Garcia, G, Gul, M, Mccartin, J, Ocampo Rios, AA, Poyraz, D, Ryckbosch, D, Salva, S, Schöfbeck, R, and Sigamani, M
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: Measurements of the associated production of a Z boson with at least one jet originating from a b quark in proton-proton collisions at s=8TeV are presented. Differential cross sections are measured with data collected by the CMS experiment corresponding to an integrated luminosity of 19.8 fb-1 . Z bosons are reconstructed through their decays to electrons and muons. Cross sections are measured as a function of observables characterizing the kinematics of the b jet and the Z boson. Ratios of differential cross sections for the associated production with at least one b jet to the associated production with any jet are also presented. The production of a Z boson with at least two b jets is investigated, and differential cross sections are measured for the dijet system. Results are compared to theoretical predictions, testing two different flavour schemes for the choice of initial-state partons.
Published: 2017

38. Search for new phenomena with the MT2 variable in the all-hadronic final state produced in proton–proton collisions at s=13TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rabady, D, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Strauss, J, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Suarez Gonzalez, J, De Wolf, EA, Croce, D Di, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Abu Zeid, S, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Salva, S, Tytgat, M, Verbeke, W, Zaganidis, N, and Bakhshiansohi, H
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A search for new phenomena is performed using events with jets and significant transverse momentum imbalance, as inferred through the MT2 variable. The results are based on a sample of proton-proton collisions collected in 2016 at a center-of-mass energy of 13 TeV with the CMS detector and corresponding to an integrated luminosity of 35.9 fb-1 . No excess event yield is observed above the predicted standard model background, and the results are interpreted as exclusion limits at 95% confidence level on the masses of predicted particles in a variety of simplified models of R-parity conserving supersymmetry. Depending on the details of the model, 95% confidence level lower limits on the gluino (light-flavor squark) masses are placed up to 2025 (1550) GeV . Mass limits as high as 1070 (1175) GeV are set on the masses of top (bottom) squarks. Information is provided to enable re-interpretation of these results, including model-independent limits on the number of non-standard model events for a set of simplified, inclusive search regions.
Published: 2017

39. Search for heavy resonances that decay into a vector boson and a Higgs boson in hadronic final states at s=13TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rabady, D, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Strauss, J, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Zeid, S Abu, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Salva, S, Tytgat, M, Verbeke, W, Zaganidis, N, Bakhshiansohi, H, Bondu, O, and Brochet, S
Subjects: CMS Collaboration, B2G, CMS, Diboson, Hadronic, Higgs, Physics, VH, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A search for heavy resonances with masses above 1 TeV , decaying to final states containing a vector boson and a Higgs boson, is presented. The search considers hadronic decays of the vector boson, and Higgs boson decays to b quarks. The decay products are highly boosted, and each collimated pair of quarks is reconstructed as a single, massive jet. The analysis is performed using a data sample collected in 2016 by the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV , corresponding to an integrated luminosity of 35.9 fb-1 . The data are consistent with the background expectation and are used to place limits on the parameters of a theoretical model with a heavy vector triplet. In the benchmark scenario with mass-degenerate W' and Z' bosons decaying predominantly to pairs of standard model bosons, for the first time heavy resonances for masses as high as 3.3 TeV are excluded at 95% confidence level, setting the most stringent constraints to date on such states decaying into a vector boson and a Higgs boson.
Published: 2017

40. Search for physics beyond the standard model in events with two leptons of same sign, missing transverse momentum, and jets in proton–proton collisions at s=13TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Grossmann, J, Hrubec, J, Jeitler, M, König, A, Krammer, N, Krätschmer, I, Liko, D, Madlener, T, Mikulec, I, Pree, E, Rabady, D, Rad, N, Rohringer, H, Schieck, J, Schöfbeck, R, Spanring, M, Spitzbart, D, Strauss, J, Waltenberger, W, Wittmann, J, Wulz, C-E, Zarucki, M, Chekhovsky, V, Mossolov, V, Gonzalez, J Suarez, De Wolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Zeid, S Abu, Blekman, F, D’Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Velde, C Vander, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Salva, S, Tytgat, M, Verbeke, W, Zaganidis, N, and Bakhshiansohi, H
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A data sample of events from proton-proton collisions with two isolated same-sign leptons, missing transverse momentum, and jets is studied in a search for signatures of new physics phenomena by the CMS Collaboration at the LHC. The data correspond to an integrated luminosity of 35.9 fb-1 , and a center-of-mass energy of 13 TeV . The properties of the events are consistent with expectations from standard model processes, and no excess yield is observed. Exclusion limits at 95% confidence level are set on cross sections for the pair production of gluinos, squarks, and same-sign top quarks, as well as top-quark associated production of a heavy scalar or pseudoscalar boson decaying to top quarks, and on the standard model production of events with four top quarks. The observed lower mass limits are as high as 1500 GeV for gluinos, 830 GeV for bottom squarks. The excluded mass range for heavy (pseudo)scalar bosons is 350-360 (350-410) GeV . Additionally, model-independent limits in several topological regions are provided, allowing for further interpretations of the results.
Published: 2017

41. Measurement of double-differential cross sections for top quark pair production in pp collisions at s=8TeV and impact on parton distribution functions

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Waltenberger, W, Wulz, C-E, Dvornikov, O, Makarenko, V, Mossolov, V, Suarez Gonzalez, J, Zykunov, V, Shumeiko, N, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Abu Zeid, S, Blekman, F, D’Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Salva, S, Schöfbeck, R, Tytgat, M, Van Driessche, W, Yazgan, E, Zaganidis, N, Bakhshiansohi, H, Bondu, O, Brochet, S, Bruno, G, and Caudron, A
Subjects: CMS Collaboration, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: Normalized double-differential cross sections for top quark pair ([Formula: see text]) production are measured in pp collisions at a centre-of-mass energy of 8[Formula: see text] with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 19.7[Formula: see text]. The measurement is performed in the dilepton [Formula: see text] final state. The [Formula: see text] cross section is determined as a function of various pairs of observables characterizing the kinematics of the top quark and [Formula: see text] system. The data are compared to calculations using perturbative quantum chromodynamics at next-to-leading and approximate next-to-next-to-leading orders. They are also compared to predictions of Monte Carlo event generators that complement fixed-order computations with parton showers, hadronization, and multiple-parton interactions. Overall agreement is observed with the predictions, which is improved when the latest global sets of proton parton distribution functions are used. The inclusion of the measured [Formula: see text] cross sections in a fit of parametrized parton distribution functions is shown to have significant impact on the gluon distribution.
Published: 2017

42. Measurement of the top quark mass using single top quark events in proton-proton collisions at s=8 TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Waltenberger, W, Wulz, C-E, Dvornikov, O, Makarenko, V, Mossolov, V, Gonzalez, J Suarez, Zykunov, V, Shumeiko, N, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Abu Zeid, S, Blekman, F, D’Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Salva, S, Schöfbeck, R, Tytgat, M, Van Driessche, W, Yazgan, E, Zaganidis, N, Bakhshiansohi, H, Beluffi, C, Bondu, O, and Brochet, S
Subjects: CMS Collaboration, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A measurement of the top quark mass is reported in events containing a single top quark produced via the electroweak t channel. The analysis is performed using data from proton-proton collisions collected with the CMS detector at the LHC at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.7 fb[Formula: see text]. Top quark candidates are reconstructed from their decay to a [Formula: see text] boson and a b quark, with the [Formula: see text] boson decaying leptonically to a muon and a neutrino. The final state signature and kinematic properties of single top quark events in the t channel are used to enhance the purity of the sample, suppressing the contribution from top quark pair production. A fit to the invariant mass distribution of reconstructed top quark candidates yields a value of the top quark mass of [Formula: see text]. This result is in agreement with the current world average, and represents the first measurement of the top quark mass in event topologies not dominated by top quark pair production, therefore contributing to future averages with partially uncorrelated systematic uncertainties and a largely uncorrelated statistical uncertainty.
Published: 2017

43. A search for new phenomena in pp collisions at s=13TeV in final states with missing transverse momentum and at least one jet using the αT variable

Author: Khachatryan, V, Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Waltenberger, W, Wulz, C-E, Dvornikov, O, Makarenko, V, Zykunov, V, Mossolov, V, Shumeiko, N, Suarez Gonzalez, J, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Abu Zeid, S, Blekman, F, D’Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Garcia, G, Gul, M, Khvastunov, I, Poyraz, D, Salva, S, Schöfbeck, R, Sharma, A, Tytgat, M, Van Driessche, W, Yazgan, E, Zaganidis, N, Bakhshiansohi, H, and Beluffi, C
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A search for new phenomena is performed in final states containing one or more jets and an imbalance in transverse momentum in pp collisions at a centre-of-mass energy of 13[Formula: see text]. The analysed data sample, recorded with the CMS detector at the CERN LHC, corresponds to an integrated luminosity of 2.3[Formula: see text]. Several kinematic variables are employed to suppress the dominant background, multijet production, as well as to discriminate between other standard model and new physics processes. The search provides sensitivity to a broad range of new-physics models that yield a stable weakly interacting massive particle. The number of observed candidate events is found to agree with the expected contributions from standard model processes, and the result is interpreted in the mass parameter space of fourteen simplified supersymmetric models that assume the pair production of gluinos or squarks and a range of decay modes. For models that assume gluino pair production, masses up to 1575 and 975[Formula: see text] are excluded for gluinos and neutralinos, respectively. For models involving the pair production of top squarks and compressed mass spectra, top squark masses up to 400[Formula: see text] are excluded.
Published: 2017

44. Searches for pair production of third-generation squarks in s=13TeV pp collisions

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Waltenberger, W, Wulz, C-E, Chekhovsky, V, Dvornikov, O, Dydyshka, Y, Emeliantchik, I, Litomin, A, Makarenko, V, Mossolov, V, Stefanovitch, R, Suarez Gonzalez, J, Zykunov, V, Shumeiko, N, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Abu Zeid, S, Blekman, F, D’Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Salva, S, Schöfbeck, R, Tytgat, M, Van Driessche, W, and Yazgan, E
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: Searches are presented for direct production of top or bottom squark pairs in proton-proton collisions at the CERN LHC. Two searches, based on complementary techniques, are performed in all-jet final states that are characterized by a significant imbalance in transverse momentum. An additional search requires the presence of a charged lepton isolated from other activity in the event. The data were collected in 2015 at a centre-of-mass energy of 13[Formula: see text] with the CMS detector and correspond to an integrated luminosity of 2.3[Formula: see text]. No statistically significant excess of events is found beyond the expected contribution from standard model processes. Exclusion limits are set in the context of simplified models of top or bottom squark pair production. Models with top and bottom squark masses up to 830 and 890[Formula: see text], respectively, are probed for light neutralinos. For models with top squark masses of 675[Formula: see text], neutralino masses up to 260[Formula: see text] are excluded at 95% confidence level.
Published: 2017

45. Measurement of prompt and nonprompt J/ψ production in pp and pPb collisions at sNN=5.02TeV

Author: Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Waltenberger, W, Wulz, C-E, Dvornikov, O, Makarenko, V, Mossolov, V, Suarez Gonzalez, J, Zykunov, V, Shumeiko, N, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Abu Zeid, S, Blekman, F, D’Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Salva, S, Schöfbeck, R, Tytgat, M, Van Driessche, W, Yazgan, E, Zaganidis, N, Bakhshiansohi, H, Beluffi, C, Bondu, O, and Brochet, S
Subjects: Genetics, CMS Collaboration, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: This paper reports the measurement of [Formula: see text] meson production in proton-proton ([Formula: see text]) and proton-lead ([Formula: see text]) collisions at a center-of-mass energy per nucleon pair of [Formula: see text] by the CMS experiment at the LHC. The data samples used in the analysis correspond to integrated luminosities of 28[Formula: see text] and 35[Formula: see text] for [Formula: see text] and [Formula: see text] collisions, respectively. Prompt and nonprompt [Formula: see text] mesons, the latter produced in the decay of [Formula: see text] hadrons, are measured in their dimuon decay channels. Differential cross sections are measured in the transverse momentum range of [Formula: see text], and center-of-mass rapidity ranges of [Formula: see text] ([Formula: see text]) and [Formula: see text] ([Formula: see text]). The nuclear modification factor, [Formula: see text], is measured as a function of both [Formula: see text] and [Formula: see text]. Small modifications to the [Formula: see text] cross sections are observed in [Formula: see text] relative to [Formula: see text] collisions. The ratio of [Formula: see text] production cross sections in [Formula: see text]-going and Pb-going directions, [Formula: see text], studied as functions of [Formula: see text] and [Formula: see text], shows a significant decrease for increasing transverse energy deposited at large pseudorapidities. These results, which cover a wide kinematic range, provide new insight on the role of cold nuclear matter effects on prompt and nonprompt [Formula: see text] production.
Published: 2017

46. Suppression and azimuthal anisotropy of prompt and nonprompt J/ψ production in PbPb collisions at sNN=2.76TeV

Author: Khachatryan, V, Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Waltenberger, W, Wulz, C-E, Dvornikov, O, Makarenko, V, Zykunov, V, Mossolov, V, Shumeiko, N, Suarez Gonzalez, J, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Abu Zeid, S, Blekman, F, D’Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Garcia, G, Gul, M, Khvastunov, I, Poyraz, D, Salva, S, Schöfbeck, R, Sharma, A, Tytgat, M, Van Driessche, W, Yazgan, E, Zaganidis, N, Bakhshiansohi, H, and Beluffi, C
Subjects: CMS Collaboration, nucl-ex, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: The nuclear modification factor [Formula: see text] and the azimuthal anisotropy coefficient [Formula: see text] of prompt and nonprompt (i.e. those from decays of b hadrons) [Formula: see text] mesons, measured from PbPb and pp collisions at [Formula: see text] [Formula: see text] at the LHC, are reported. The results are presented in several event centrality intervals and several kinematic regions, for transverse momenta [Formula: see text] [Formula: see text] and rapidity [Formula: see text], extending down to [Formula: see text] [Formula: see text] in the [Formula: see text] range. The [Formula: see text] of prompt [Formula: see text] is found to be nonzero, but with no strong dependence on centrality, rapidity, or [Formula: see text] over the full kinematic range studied. The measured [Formula: see text] of nonprompt [Formula: see text] is consistent with zero. The [Formula: see text] of prompt [Formula: see text] exhibits a suppression that increases from peripheral to central collisions but does not vary strongly as a function of either y or [Formula: see text] in the fiducial range. The nonprompt [Formula: see text] [Formula: see text] shows a suppression which becomes stronger as rapidity or [Formula: see text] increases. The [Formula: see text] and [Formula: see text] of open and hidden charm, and of open charm and beauty, are compared.
Published: 2017

47. Measurement of the tt¯ production cross section using events in the eμ final state in pp collisions at s=13TeV

Author: Khachatryan, V, Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Waltenberger, W, Wulz, C-E, Dvornikov, O, Makarenko, V, Zykunov, V, Mossolov, V, Shumeiko, N, Gonzalez, J Suarez, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Zeid, S Abu, Blekman, F, D’Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Velde, C Vander, Vanlaer, P, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Garcia, G, Gul, M, Khvastunov, I, Poyraz, D, Salva, S, Schöfbeck, R, Sharma, A, Tytgat, M, Van Driessche, W, Yazgan, E, Zaganidis, N, Bakhshiansohi, H, Beluffi, C, and Bondu, O
Subjects: CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: The cross section of top quark-antiquark pair production in proton-proton collisions at [Formula: see text] is measured by the CMS experiment at the LHC, using data corresponding to an integrated luminosity of 2.2[Formula: see text]. The measurement is performed by analyzing events in which the final state includes one electron, one muon, and two or more jets, at least one of which is identified as originating from hadronization of a b quark. The measured cross section is [Formula: see text], in agreement with the expectation from the standard model.
Published: 2017

48. Measurement of the production cross section of a W boson in association with two b jets in pp collisions at s=8TeV

Author: Khachatryan, V, Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Treberer-Treberspurg, W, Waltenberger, W, Wulz, C-E, Mossolov, V, Shumeiko, N, Gonzalez, J Suarez, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Zeid, S Abu, Blekman, F, D’Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Heracleous, N, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Caillol, C, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Velde, C Vander, Vanlaer, P, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Garcia, G, Gul, M, Poyraz, D, Salva, S, Schöfbeck, R, Tytgat, M, Van Driessche, W, Yazgan, E, Zaganidis, N, Bakhshiansohi, H, Beluffi, C, Bondu, O, Brochet, S, and Bruno, G
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, CMS Collaboration, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract: The production cross section of a W boson in association with two b jets is measured using a sample of proton-proton collisions at [Formula: see text] collected by the CMS experiment at the CERN LHC. The data sample corresponds to an integrated luminosity of 19.8[Formula: see text]. The W bosons are reconstructed via their leptonic decays, [Formula: see text], where [Formula: see text] or [Formula: see text]. The fiducial region studied contains exactly one lepton with transverse momentum [Formula: see text] and pseudorapidity [Formula: see text], with exactly two b jets with [Formula: see text] and [Formula: see text] and no other jets with [Formula: see text] and [Formula: see text]. The cross section is measured to be [Formula: see text]+[Formula: see text], in agreement with standard model predictions.
Published: 2017

49. High Resolution Spectroscopic Study of $^{10}_{\Lambda}$Be

Author: Gogami, T., Chen, C., Kawama, D., Achenbach, P., Ahmidouch, A., Albayrak, I., Androic, D., Asaturyan, A., Asaturyan, R., Ates, O., Baturin, P., Badui, R., Boeglin, W., Bono, J., Brash, E., Carter, P., Chiba, A., Christy, E., Danagoulian, S., De Leo, R., Doi, D., Elaasar, M., Ent, R., Fujii, Y., Fujita, M., Furic, M., Gabrielyan, M., Gan, L., Garibaldi, F., Gaskell, D., Gasparian, A., Han, Y., Hashimoto, O., Horn, T., Hu, B., Hungerford, Ed. V., Jones, M., Kanda, H., Kaneta, M., Kato, S., Kawai, M., Khanal, H., Kohl, M., Liyanage, A., Luo, W., Maeda, K., Margaryan, A., Markowitz, P., Maruta, T., Matsumura, A., Maxwell, V., Mkrtchyan, A., Mkrtchyan, H., Nagao, S., Nakamura, S. N., Narayan, A., Neville, C., Niculescu, G., Niculescu, M. I., Nunez, A., Nuruzzaman, Okayasu, Y., Petkovic, T., Pochodzalla, J., Qiu, X., Reinhold, J., Rodriguez, V. M., Samanta, C., Sawatzky, B., Seva, T., Shichijo, A., Tadevosyan, V., Tang, L., Taniya, N., Tsukada, K., Veilleux, M., Vulcan, W., Wesselmann, F. R., Wood, S. A., Yamamoto, T., Ya, L., Ye, Z., Yokota, K., Yuan, L., Zhamkochyan, S., and Zhu, L.
Subjects: Nuclear Experiment
Abstract: Spectroscopy of a $^{10}_{\Lambda}$Be hypernucleus was carried out at JLab Hall C using the $(e,e^{\prime}K^{+})$ reaction. A new magnetic spectrometer system (SPL+HES+HKS), specifically designed for high resolution hypernuclear spectroscopy, was used to obtain an energy spectrum with a resolution of 0.78 MeV (FWHM). The well-calibrated spectrometer system of the present experiment using the $p(e,e^{\prime}K^{+})\Lambda,\Sigma^{0}$ reactions allowed us to determine the energy levels, and the binding energy of the ground state peak (mixture of 1$^{-}$ and 2$^{-}$ states) was obtained to be B$_{\Lambda}$=8.55$\pm$0.07(stat.)$\pm$0.11(sys.) MeV. The result indicates that the ground state energy is shallower than that of an emulsion study by about 0.5 MeV which provides valuable experimental information on charge symmetry breaking effect in the $\Lambda N$ interaction., Comment: 6 figures
Published: 2015
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50. Trapping in irradiated p-on-n silicon sensors at fluences anticipated at the HL-LHC outer tracker

Author: Adam, W., Bergauer, T., Dragicevic, M., Friedl, M., Fruehwirth, R., Hoch, M., Hrubec, J., Krammer, M., Treberspurg, W., Waltenberger, W., Alderweireldt, S., Beaumont, W., Janssen, X., Luyckx, S., Van Mechelen, P., Van Remortel, N., Van Spilbeeck, A., Barria, P., Caillol, C., Clerbaux, B., De Lentdecker, G., Dobur, D., Favart, L., Grebenyuk, A., Lenzi, Th., Léonard, A., Maerschalk, Th., Mohammadi, A., Perniè, L., Randle-Conde, A., Reis, T., Seva, T., Thomas, L., Velde, C. Vander, Vanlaer, P., Wang, J., Zenoni, F., Zeid, S. Abu, Blekman, F., De Bruyn, I., D'Hondt, J., Daci, N., Deroover, K., Heracleous, N., Keaveney, J., Lowette, S., Moreels, L., Olbrechts, A., Python, Q., Tavernier, S., Van Mulders, P., Van Onsem, G., Van Parijs, I., Strom, D. A., Caudron, A., Ceard, L., De Callatay, B., Delaere, C., Pree, T. Du, Forthomme, L., Giammanco, A., Hollar, J., Jez, P., Michotte, D., Nuttens, C., Perrini, L., Pagano, D., Quertenmont, L., Selvaggi, M., Marono, M. Vidal, Beliy, N., Caebergs, T., Daubie, E., Hammad, G. H., Härkönen, J., Lampén, T., Luukka, P. -R., Mäenpää, T., Peltola, T., Tuominen, E., Tuovinen, E., Eerola, P., Tuuva, T., Beaulieu, G., Boudoul, G., Combaret, C., Contardo, D., Gallbit, G., Lumb, N., Mathez, H., Mirabito, L., Perries, S., Sabes, D., Donckt, M. Vander, Verdier, P., Viret, S., Zoccarato, Y., Agram, J. -L., Conte, E., Fontaine, J. -Ch., Andrea, J., Bloch, D., Bonnin, C., Brom, J. -M., Chabert, E., Charles, L., Goetzmann, Ch., Gross, L., Hosselet, J., Mathieu, C., Richer, M., Skovpen, K., Autermann, C., Edelhoff, M., Esser, H., Feld, L., Karpinski, W., Klein, K., Lipinski, M., Ostapchuk, A., Pierschel, G., Preuten, M., Raupach, F., Sammet, J., Schael, S., Schwering, G., Wittmer, B., Wlochal, M., Zhukov, V., Pistone, C., Fluegge, G., Kuensken, A., Geisler, M., Pooth, O., Stahl, A., Bartosik, N., Behr, J., Burgmeier, A., Calligaris, L., Dolinska, G., Eckerlin, G., Eckstein, D., Eichhorn, T., Fluke, G., Garcia, J. Garay, Gizhko, A., Hansen, K., Harb, A., Hauk, J., Kalogeropoulos, A., Kleinwort, C., Korol, I., Lange, W., Lohmann, W., Mankel, R., Maser, H., Mittag, G., Muhl, C., Mussgiller, A., Nayak, A., Ntomari, E., Perrey, H., Pitzl, D., Schroeder, M., Seitz, C., Spannagel, S., Zuber, A., Biskop, H., Blobel, V., Buhmann, P., Centis-Vignali, M., Draeger, A. -R., Erfle, J., Garutti, E., Haller, J., Hoffmann, M., Junkes, A., Lapsien, T., Mättig, S., Matysek, M., Perieanu, A., Poehlsen, J., Poehlsen, T., Scharf, Ch., Schleper, P., Schmidt, A., Sola, V., Steinbrück, G., Wellhausen, J., Barvich, T., Barth, Ch., Boegelspacher, F., De Boer, W., Butz, E., Casele, M., Colombo, F., Dierlamm, A., Eber, R., Freund, B., Hartmann, F., Hauth, Th., Heindl, S., Hoffmann, K. -H., Husemann, U., Kornmeyer, A., Mallows, S., Muller, Th., Nuernberg, A., Printz, M., Simonis, H. J., Steck, P., Weber, M., Weiler, Th., Bhardwaj, A., Kumar, A., Ranjan, K., Bakhshiansohl, H., Behnamian, H., Khakzad, M., Naseri, M., Cariola, P., De Robertis, G., Fiore, L., Franco, M., Loddo, F., Sala, G., Silvestris, L., Creanza, D., De Palma, M., Maggi, G., My, S., Selvaggi, G., Albergo, S., Cappello, G., Chiorboli, M., Costa, S., Giordano, F., Di Mattia, A., Potenza, R., Saizu, M. A., Tricomi, A., Tuvè, C., Barbagli, G., Brianzi, M., Ciaranfi, R., Civinini, C., Gallo, E., Meschini, M., Paoletti, S., Sguazzoni, G., Ciulli, V., D'Alessandro, R., Gonzi, S., Gori, V., Focardi, E., Lenzi, P., Scarlini, E., Tropiano, A., Viliani, L., Ferro, F., Robutti, E., Vetere, M. Lo, Gennai, S., Malvezzi, S., Menasce, D., Moroni, L., Pedrini, D., Dinardo, M., Fiorendi, S., Manzoni, R. A., Azzi, P., Bacchetta, N., Bisello, D., Dall'Osso, M., Dorigo, T., Giubilato, P., Pozzobon, N., Tosi, M., Zucchetta, A., De Canio, F., Gaioni, L., Manghisoni, M., Nodari, B., Re, V., Traversi, G., Comotti, D., Ratti, L., Bilei, G. M., Bissi, L., Checcucci, B., Magalotti, D., Menichelli, M., Saha, A., Servoli, L., Storchi, L., Biasini, M., Conti, E., Ciangottini, D., Fanò, L., Lariccia, P., Mantovani, G., Passeri, D., Placidi, P., Salvatore, M., Santocchia, A., Solestizi, L. A., Spiezia, A., Androsov, K., Azzurri, P., Arezzini, S., Bagliesi, G., Basti, A., Boccali, T., Bosi, F., Castaldi, R., Ciampa, A., Cioccid, M. A., Dell'Orso, R., Fedi, G., Giassi, A., Grippod, M. T., Lomtadze, T., Magazzu, G., Mazzoni, E., Minuti, M., Moggi, A., Moond, C. S., Morsani, F., Palla, F., Palmonari, F., Raffaelli, F., Savoy-Navarro, A., Serban, A. T., Spagnolo, P., Tenchini, R., Venturi, A., Verdini, P. G., Martini, L., Messineo, A., Rizzi, A., Tonelli, G., Calzolari, F., Donato, S., Fiori, F., Ligabue, F., Vernieri, C., Demaria, N., Rivetti, A., Bellan, R., Casasso, S., Costa, M., Covarelli, R., Migliore, E., Monteil, E., Musich, M., Pacher, L., Ravera, F., Romero, A., Solano, A., Trapani, P., Echeverria, R. Jaramillo, Fernandez, M., Gomez, G., Moya, D., Sanchez, F. J. Gonzalez, Sanchez, F. J. Munoz, Vila, I., Virto, A. L., Abbaneo, D., Ahmed, I., Albert, E., Auzinger, G., Berruti, G., Bianchi, G., Blanchot, G., Breuker, H., Ceresa, D., Christiansen, J., Cichy, K., Daguin, J., D'Alfonso, M., D'Auria, A., Detraz, S., De Visscher, S., Deyrail, D., Faccio, F., Felici, D., Frank, N., Gill, K., Giordano, D., Harris, P., Honma, A., Kaplon, J., Kornmayer, A., Kottelat, L., Kovacs, M., Mannelli, M., Marchioro, A., Marconi, S., Martina, S., Mersi, S., Michelis, S., Moll, M., Onnela, A., Pakulski, T., Pavis, S., Peisert, A., Pernot, J. -F., Petagna, P., Petrucciani, G., Postema, H., Rose, P., Rzonca, M., Stoye, M., Tropea, P., Troska, J., Tsirou, A., Vasey, F., Vichoudis, P., Verlaat, B., Zwalinski, L., Bachmair, F., Becker, R., Bäni, L., di Calafiori, D., Casal, B., Djambazov, L., Donega, M., Dünser, M., Eller, P., Grab, C., Hits, D., Horisberger, U., Hoss, J., Kasieczka, G., Lustermann, W., Mangano, B., Marionneau, M., del Arbol, P. Martinez Ruiz, Masciovecchio, M., Perrozzi, L., Roeser, U., Rossini, M., Starodumov, A., Takahashi, M., Wallny, R., Amsler, C., Bösiger, K., Caminada, L., Canelli, F., Chiochia, V., de Cosa, A., Galloni, C., Hreus, T., Kilminster, B., Lange, C., Maier, R., Ngadiuba, J., Pinna, D., Robmann, P., Taroni, S., Yang, Y., Bertl, W., Deiters, K., Erdmann, W., Horisberger, R., Kaestli, H. -C., Kotlinski, D., Langenegger, U., Meier, B., Rohe, T., Streuli, S., Chen, P. -H., Dietz, C., Grundler, U., Hou, W. -S., Lu, R. -S., Moya, M., Wilken, R., Cussans, D., Flacher, H., Goldstein, J., Grimes, M., Jacob, J., Nasr-Storey, S. Seif El, Cole, J., Hobson, P., Leggat, D., Reid, I. D., Teodorescu, L., Bainbridge, R., Dauncey, P., Fulcher, J., Hall, G., Magnan, A. -M., Pesaresi, M., Raymond, D. M., Uchida, K., Coughlan, J. A., Harder, K., Ilic, J., Tomalin, I. R., Garabedian, A., Heintz, U., Narain, M., Nelson, J., Sagir, S., Speer, T., Swanson, J., Tersegno, D., Watson-Daniels, J., Chertok, M., Conway, J., Conway, R., Flores, C., Lander, R., Pellett, D., Ricci-Tam, F., Squires, M., Thomson, J., Yohay, R., Burt, K., Ellison, J., Hanson, G., Malberti, M., Olmedo, M., Cerati, G., Sharma, V., Vartak, A., Yagil, A., Della Porta, G. Zevi, Dutta, V., Gouskos, L., Incandela, J., Kyre, S., McColl, N., Mullin, S., White, D., Cumalat, J. P., Ford, W. T., Gaz, A., Krohn, M., Stenson, K., Wagner, S. R., Baldin, B., Bolla, G., Burkett, K., Butler, J., Cheung, H., Chramowicz, J., Christian, D., Cooper, W. E., Deptuch, G., Derylo, G., Gingu, C., Gruenendahl, S., Hasegawa, S., Hoff, J., Howell, J., Hrycyk, M., Jindariani, S., Johnson, M., Jung, A., Joshi, U., Kahlid, F., Lei, C. M., Lipton, R., Liu, T., Los, S., Matulik, M., Merkel, P., Nahn, S., Prosser, A., Rivera, R., Shenai, A., Spiegel, L., Tran, N., Uplegger, L., Voirin, E., Yin, H., Adams, M. R., Berry, D. R., Evdokimov, A., Evdokimov, O., Gerber, C. E., Hofman, D. J., Kapustka, B. K., O'Brien, C., Gonzalez, D. I. Sandoval, Trauger, H., Turner, P., Parashar, N., Stupak, J., Bortoletto, D., Bubna, M., Hinton, N., Jones, M., Miller, D. H., Shi, X., Tan, P., Baringer, P., Bean, A., Benelli, G., Gray, J., Majumder, D., Noonan, D., Sanders, S., Stringer, R., Ivanov, A., Makouski, M., Skhirtladze, N., Taylor, R., Anderson, I., Fehling, D., Gritsan, A., Maksimovic, P., Martin, C., Nash, K., Osherson, M., Swartz, M., Xiao, M., Acosta, J. G., Cremaldi, L. M., Oliveros, S., Perera, L., Summers, D., Bloom, K., Bose, S., Claes, D. R., Dominguez, A., Fangmeier, C., Suarez, R. Gonzalez, Meier, F., Monroy, J., Hahn, K., Sevova, S., Sung, K., Trovato, M., Bartz, E., Duggan, D., Halkiadakis, E., Lath, A., Park, M., Schnetzer, S., Stone, R., Walker, M., Malik, S., Mendez, H., Vargas, J. E. Ramirez, Alyari, M., Dolen, J., George, J., Godshalk, A., Iashvili, I., Kaisen, J., Kharchilava, A., Rappoccio, S., Alexander, J., Chaves, J., Chu, J., Dittmer, S., Kaufman, G., Mirman, N., Ryd, A., Salvati, E., Skinnari, L., Thom, J., Thompson, J., Tucker, J., Winstrom, L., Akgün, B., Ecklund, K. M., Nussbaum, T., Zabel, J., Betchart, B., Demina, R., Hindrichs, O., Petrillo, G., Eusebi, R., Osipenkov, I., Perloff, A., Ulmer, K. A., Delannoy, A. G., D'Angelo, P., and Johns, W.
Subjects: Physics - Instrumentation and Detectors
Abstract: The degradation of signal in silicon sensors is studied under conditions expected at the CERN High-Luminosity LHC. 200 $\mu$m thick n-type silicon sensors are irradiated with protons of different energies to fluences of up to $3 \cdot 10^{15}$ neq/cm$^2$. Pulsed red laser light with a wavelength of 672 nm is used to generate electron-hole pairs in the sensors. The induced signals are used to determine the charge collection efficiencies separately for electrons and holes drifting through the sensor. The effective trapping rates are extracted by comparing the results to simulation. The electric field is simulated using Synopsys device simulation assuming two effective defects. The generation and drift of charge carriers are simulated in an independent simulation based on PixelAV. The effective trapping rates are determined from the measured charge collection efficiencies and the simulated and measured time-resolved current pulses are compared. The effective trapping rates determined for both electrons and holes are about 50% smaller than those obtained using standard extrapolations of studies at low fluences and suggests an improved tracker performance over initial expectations.
Published: 2015
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