14 results on '"Klempt, E."'
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2. Scalar and tensor mesons in $d\bar d$, $s\bar s$ and $gg\to f_0, f_2$
- Author
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Sarantsev, A. V. and Klempt, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
LHCb data on $B^0\to\jpsi \pi^+\pi^-$, $B_{s} ^0\to\jpsi \pi^+\pi^-$ and $B_{s} ^0\to\jpsi K^+K^-$ are fitted in a coupled-channel analysis jointly with data on radiative $\jpsi$ decays, $\pi\pi$ elastic scattering and further data sets. Branching ratios for $B_{(s)} ^0\to\jpsi f_0,f_2$ are determined and compared to branching ratios from radiative $J/\psi$ decays. Above 1500\,MeV, only little intensity is observed in $B_{(s)} ^0\to\jpsi f_0,f_2$ decays while in radiative $\jpsi$ decays the intensities peak at 1865\,MeV in the scalar, and at 2210\,MeV in the tensor wave. This pattern is interpreted as further support for the glueball interpretation of $G_0(1865)$ and $G_2(2210)$., Comment: 6 pages, 5 figures, 3 tables, revised
- Published
- 2022
3. Note on the definitions of branching ratios of overlapping resonances
- Author
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Burkert, V., Crede, V., Klempt, E., Nikonov, K. V., Oller, J. A., Peláez, J. R., de Elvira, J. Ruiz, Sarantsev, A. V., Tiator, L., Thoma, U., and Workman, R.
- Subjects
High Energy Physics - Phenomenology - Abstract
Branching ratios for the decay of hadrons with large width or near thresholds depend on their definition. We test different definitions and show that rather different branching ratios can be obtained. For wide resonances and for sequential decays with wide intermediate resonances, integration over the spectral functions is mandatory. The tests are performed exploiting the latest solution of the Bonn-Gatchina multi-channel analysis and published values for residues of light scalar mesons. For a resonance overlapping with a threshold, in case its pole lies in a non-adjacent sheet, we show how the total width, needed for the branching ratios, does not correspond to the imaginary part of the pole position. We use the Madrid-Krakow dispersive parameterizations to illustrate this situation with the $f_0(980)$., Comment: Report, 9 pages (extended to light scalar mesons)
- Published
- 2022
- Full Text
- View/download PDF
4. Polarization observables in double neutral pion photoproduction
- Author
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Collaboration, CBELSA/TAPS, Seifen, T., Hartmann, J., Afzal, F., Anisovich, A. V., Beck, R., Becker, M., Berlin, A., Bichow, M., Brinkmann, K. -Th., Crede, V., Dieterle, M., Dutz, H., Eberhardt, H., Elsner, D., Fornet-Ponse, K., Friedrich, St., Frommberger, F., Funke, Ch., Gottschall, M., Grüner, M., Görtz, St., Gutz, E., Hammann, Ch., Hannappel, J., Herick, J., Hillert, W., Hoffmeister, Ph., Honisch, Ch., Jahn, O., Jude, T., Käser, A., Kaiser, D., Kalinowsky, H., Kalischewski, F., Klassen, P., Keshelashvili, I., Klein, F., Klempt, E., Koop, K., Krusche, B., Lang, M., Mahlberg, Ph., Makonyi, K., Messi, F., Metag, V., Meyer, W., Müller, J., Müllers, J., Nanova, M., Nikonov, K., Nikonov, V. A., Novotny, R., Reeve, S., Roth, B., Reicherz, G., Rostomyan, T., Runkel, St., Sarantsev, A. V., Schmidt, Ch., Schmieden, H., Schmitz, R., Schultes, J., Sokhoyan, V., Stausberg, N., Thiel, A., Thoma, U., Urban, M., Urff, G., van Pee, H., Walther, D., Wendel, Ch., Wiedner, U., Wilson, A., Witthauer, L., and Wunderlich, Y.
- Subjects
Nuclear Experiment - Abstract
Measurements of target asymmetries and double-polarization observables for the reaction $\gamma p\to p\pi^0\pi^0$ are reported. The data were taken with the CBELSA/TAPS experiment at the ELSA facility (Bonn University) using the Bonn frozen-spin butanol (C$_4$H$_9$OH) target, which provided transversely polarized protons. Linearly polarized photons were produced via bremsstrahlung off a diamond crystal. The data cover the photon energy range from $E_{\gamma}$=650 MeV to $E_{\gamma}$=2600 MeV and nearly the complete angular range. The results have been included in the BnGa partial wave analysis. Experimental results and the fit agree very well. Observed systematic differences in the branching ratios for decays of $N^*$ and $\Delta^*$ resonances are attributed to the internal structure of these excited nucleon states. Resonances which can be assigned to SU(6)$\times$O(3) two-oscillator configurations show larger branching ratios to intermediate states with non-zero intrinsic orbital angular momenta than resonances assigned to one-oscillator configurations., Comment: 21 pages, 27 figures
- Published
- 2022
5. Search for the tensor glueball
- Author
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Klempt, E., Sarantsev, A. V., Denisenko, I., and Nikonov, K. V.
- Subjects
High Energy Physics - Phenomenology - Abstract
The tensor glueball is searched for in BESIII data on radiative $J/\psi$ decays into $\pi^0\pi^0$ and $K_sK_s$. The $\pi\pi$ invariant mass distribution exhibits an enhancement that can be described by a pole at $(2210\pm 60) -i(180\pm 60)$\,MeV. We speculate if the tensor glueball could be distributed among high-mass tensor mesons., Comment: 8 pages, 3 figures, 2 Tables
- Published
- 2022
- Full Text
- View/download PDF
6. Review of Particle Physics
- Author
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Workman, RL, Burkert, VD, Crede, V, Klempt, E, Thoma, U, Tiator, L, Agashe, K, Aielli, G, Allanach, BC, Amsler, C, Antonelli, M, Aschenauer, EC, Asner, DM, Baer, H, Banerjee, Sw, Barnett, RM, Baudis, L, Bauer, CW, Beatty, JJ, Belousov, VI, Beringer, J, Bettini, A, Biebel, O, Black, KM, Blucher, E, Bonventre, R, Bryzgalov, VV, Buchmuller, O, Bychkov, MA, Cahn, RN, Carena, M, Ceccucci, A, Cerri, A, Chivukula, R Sekhar, Cowan, G, Cranmer, K, Cremonesi, O, D'Ambrosio, G, Damour, T, de Florian, D, de Gouvêa, A, DeGrand, T, de Jong, P, Demers, S, Dobrescu, BA, D'Onofrio, M, Doser, M, Dreiner, HK, Eerola, P, Egede, U, Eidelman, S, El-Khadra, AX, Ellis, J, Eno, SC, Erler, J, Ezhela, VV, Fetscher, W, Fields, BD, Freitas, A, Gallagher, H, Gershtein, Y, Gherghetta, T, Gonzalez-Garcia, MC, Goodman, M, Grab, C, Gritsan, AV, Grojean, C, Groom, DE, Grünewald, M, Gurtu, A, Gutsche, T, Haber, HE, Hamel, Matthieu, Hanhart, C, Hashimoto, S, Hayato, Y, Hebecker, A, Heinemeyer, S, Hernández-Rey, JJ, Hikasa, K, Hisano, J, Höcker, A, Holder, J, Hsu, L, Huston, J, Hyodo, T, Ianni, Al, Kado, M, Karliner, M, Katz, UF, Kenzie, M, Khoze, VA, Klein, SR, Krauss, F, Kreps, M, Križan, P, Krusche, B, Kwon, Y, Lahav, O, and Laiho, J
- Subjects
Nuclear and Plasma Physics ,Particle and High Energy Physics ,Physical Sciences ,Mathematical Sciences - Abstract
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements from 709 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 120 reviews are many that are new or heavily revised, including a new review on Machine Learning, and one on Spectroscopy of Light Meson Resonances. The Review is divided into two volumes. Volume 1 includes the Summary Tables and 97 review articles. Volume 2 consists of the Particle Listings and contains also 23 reviews that address specific aspects of the data presented in the Listings. The complete Review (both volumes) is published online on the website of the Particle Data Group (pdg.lbl.gov) and in a journal. Volume 1 is available in print as the PDG Book. A Particle Physics Booklet with the Summary Tables and essential tables, figures, and equations from selected review articles is available in print, as a web version optimized for use on phones, and as an Android app.
- Published
- 2022
7. Measurement of polarization observables TPHπ0η, TPHπ0η, and TPHπ0η in TPHπ0η and TPHπ0η photoproduction off quasi-free nucleons
- Author
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Jermann, N., Krusche, B., Metag, V., Afzal, F., Badea, M., Beck, R., Bielefeldt, P., Bieling, J., Biroth, M., Blanke, E., Borisov, N., Bornstein, M., Brinkmann, K.-T., Ciupka, S., Crede, V., Dolzhikov, A., Drexler, P., Dutz, H., Elsner, D., Fedorov, A., Frommberger, F., Gardner, S., Ghosal, D., Goertz, S., Gorodnov, I., Grüner, M., Hammann, C., Hartmann, J., Hillert, W., Hoffmeister, P., Honisch, C., Jude, T. C., Kalischewski, F., Ketzer, B., Klassen, P., Klein, F., Klempt, E., Knaust, J., Kolanus, N., Kreit, J., Krönert, P., Lang, M., Lazarev, A. B., Livingston, K., Lutterer, S., Mahlberg, P., Meier, C., Meyer, W., Mitlasoczki, B., Müllers, J., Nanova, M., Neganov, A., Nikonov, K., Noël, J. F., Ostrick, M., Ottnad, J., Otto, B., Penman, G., Poller, T., Proft, D., Reicherz, G., Reinartz, N., Richter, L., Runkel, S., Salisbury, B., Sarantsev, A. V., Schaab, D., Schmidt, C., Schmieden, H., Schultes, J., Seifen, T., Spieker, K., Stausberg, N., Steinacher, M., Taubert, F., Thiel, A., Thoma, U., Thomas, A., Urban, M., Urff, G., Usov, Y., van Pee, H., Wang, Y. C., Wendel, C., Wiedner, U., and Wunderlich, Y.
- Published
- 2023
- Full Text
- View/download PDF
8. Scalar and tensor mesons in dd̄, ss̄ and gg→f0, f2.
- Author
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Sarantsev, A. V. and Klempt, E.
- Subjects
- *
BRANCHING ratios , *MESONS , *DATA analysis - Abstract
LHCb data on B 0 → J ∕ ψ π + π − , B s 0 → J ∕ ψ π + π − and B s 0 → J ∕ ψ K + K − are fitted in a coupled-channel analysis jointly with data on radiative J ∕ ψ decays, π π elastic scattering and further data sets. Branching ratios for B (s) 0 → J ∕ ψ f 0 , f 2 are determined and compared to those from radiative J ∕ ψ decays. Above 1500 MeV, only little intensity is observed in B (s) 0 → J ∕ ψ f 0 , f 2 decays. In radiative J ∕ ψ decays, the intensities are strong and peak at 1865 MeV in the scalar wave and at 2210 MeV in the tensor wave. This pattern is interpreted as further support for the glueball interpretation of G 0 (1 8 6 5) and of G 2 (2 2 1 0). [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
9. Note on the definitions of branching ratios of overlapping resonances
- Author
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Burkert, V., primary, Crede, V., additional, Klempt, E., additional, Nikonov, K.V., additional, Oller, J.A., additional, Peláez, J.R., additional, Ruiz de Elvira, J., additional, Sarantsev, A., additional, Tiator, L., additional, Thoma, U., additional, and Workman, R., additional
- Published
- 2023
- Full Text
- View/download PDF
10. Note on the definitions of branching ratios of overlapping resonances
- Author
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Burkert, V., Crede, V., Klempt, E., Nikonov, K.V., Oller, J.A., Peláez Sagredo, José Ramón, Ruiz De Elvira Carrascal, Jacobo, Sarantsev, A., Tiator, L., Thoma, U., Workman, R., Burkert, V., Crede, V., Klempt, E., Nikonov, K.V., Oller, J.A., Peláez Sagredo, José Ramón, Ruiz De Elvira Carrascal, Jacobo, Sarantsev, A., Tiator, L., Thoma, U., and Workman, R.
- Abstract
2023 Descuento SCOAP, Branching ratios for the decay of hadrons with large width or near thresholds depend on their definition. We test different definitions and show that rather different branching ratios can be obtained. For wide resonances and for sequential decays with wide intermediate resonances, integration over the spectral functions is mandatory. The tests are performed exploiting the latest solution of the Bonn-Gatchina multichannel analysis and published values for residues of light scalar mesons. For a resonance overlapping with a threshold, in case its pole lies in a non-adjacent sheet, we show how the total width, needed for the branching ratios, does not correspond to the imaginary part of the pole position. We use the Madrid-Krakow dispersive parameterizations to illustrate this situation with the f_0(980)., National Natural Science Foundation of China, German Research Foundation, Ministry of Culture and Science of the State of Northrhine Westphalia, United States Department of Energy, Ministerio de Ciencia e Innovación (España), Ministerio de Economia y Competitividad (España), Unión Europea. H2020, Depto. de Física Teórica, Fac. de Ciencias Físicas, Instituto de Física de Partículas y del Cosmos (IPARCOS), TRUE, pub, Descuento UCM
- Published
- 2023
11. Polarization observables in double neutral pion photoproduction
- Author
-
TAPS Collaboration, Seifen, T., Hartmann, J., Afzal, F., Anisovich, A. V., Beck, R., Becker, M., Berlin, A., Bichow, M., Brinkmann, K. -Th., Crede, V., Dieterle, M., Dutz, H., Eberhardt, H., Elsner, D., Fornet-Ponse, K., Friedrich, St., Frommberger, F., Funke, Ch., Gottschall, M., Grüner, M., Görtz, St., Gutz, E., Hammann, Ch., Hannappel, J., Herick, J., Hillert, W., Hoffmeister, Ph., Honisch, Ch., Jahn, O., Jude, T., Käser, A., Kaiser, D., Kalinowsky, H., Kalischewski, F., Klassen, P., Keshelashvili, I., Klein, F., Klempt, E., Koop, K., Krusche, B., Lang, M., Mahlberg, Ph., Makonyi, K., Messi, F., Metag, V., Meyer, W., Müller, J., Müllers, J., Nanova, M., Nikonov, K., Nikonov, V. A., Novotny, R., Reeve, S., Roth, B., Reicherz, G., Rostomyan, T., Runkel, St., Sarantsev, A. V., Schmidt, Ch., Schmieden, H., Schmitz, R., Schultes, J., Sokhoyan, V., Stausberg, N., Thiel, A., Thoma, U., Urban, M., Urff, G., van Pee, H., Walther, D., Wendel, Ch., Wiedner, U., Wilson, A., Witthauer, L., and Wunderlich, Y.
- Subjects
FOS: Physical sciences ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment - Abstract
Measurements of target asymmetries and double-polarization observables for the reaction $\gamma p\to p\pi^0\pi^0$ are reported. The data were taken with the CBELSA/TAPS experiment at the ELSA facility (Bonn University) using the Bonn frozen-spin butanol (C$_4$H$_9$OH) target, which provided transversely polarized protons. Linearly polarized photons were produced via bremsstrahlung off a diamond crystal. The data cover the photon energy range from $E_{\gamma}$=650 MeV to $E_{\gamma}$=2600 MeV and nearly the complete angular range. The results have been included in the BnGa partial wave analysis. Experimental results and the fit agree very well. Observed systematic differences in the branching ratios for decays of $N^*$ and $\Delta^*$ resonances are attributed to the internal structure of these excited nucleon states. Resonances which can be assigned to SU(6)$\times$O(3) two-oscillator configurations show larger branching ratios to intermediate states with non-zero intrinsic orbital angular momenta than resonances assigned to one-oscillator configurations., Comment: 21 pages, 27 figures
- Published
- 2022
12. Search for the tensor glueball
- Author
-
Klempt, E., primary, Nikonov, K.V., additional, Sarantsev, A.V., additional, and Denisenko, I., additional
- Published
- 2022
- Full Text
- View/download PDF
13. Singlet-octet-glueball mixing of scalar mesons
- Author
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Klempt, E., primary and Sarantsev, A.V., additional
- Published
- 2022
- Full Text
- View/download PDF
14. Review of Particle Physics.
- Author
-
Group, Particle Data, Workman, R L, Burkert, V D, Crede, V, Klempt, E, Thoma, U, Tiator, L, Agashe, K, Aielli, G, Allanach, B C, Amsler, C, Antonelli, M, Aschenauer, E C, Asner, D M, Baer, H, Banerjee, Sw, Barnett, R M, Baudis, L, Bauer, C W, and Beatty, J J
- Subjects
PARTICLE physics ,PARTICLE detectors ,HYPOTHETICAL particles ,HIGGS bosons ,GAUGE bosons ,AXIONS ,SUPERSYMMETRY - Abstract
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements from 709 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 120 reviews are many that are new or heavily revised, including a new review on Machine Learning, and one on Spectroscopy of Light Meson Resonances. The Review is divided into two volumes. Volume 1 includes the Summary Tables and 97 review articles. Volume 2 consists of the Particle Listings and contains also 23 reviews that address specific aspects of the data presented in the Listings. The complete Review (both volumes) is published online on the website of the Particle Data Group (pdg.lbl.gov) and in a journal. Volume 1 is available in print as the PDG Book. A Particle Physics Booklet with the Summary Tables and essential tables, figures, and equations from selected review articles is available in print, as a web version optimized for use on phones, and as an Android app. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
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