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Your search keyword '"Mcilhany, K."' showing total 8 results
Start Over Author "Mcilhany, K." Topic high energy physics::phenomenology
8 results on '"Mcilhany, K."'

1. Tests of Lorentz violation in muon antineutrino to electron antineutrino oscillations

Author

Auerbach, L. B., Burman, R. L., Caldwell, D. O., Church, E. D., Cochran, A. K., Donahue, J. B., Fazely, A. R., Garvey, G. T., Gunasingha, R., Imlay, R. L., Katori, T., Louis, W. C., McIlhany, K. L., Metcalf, W. J., Mills, G. B., Sandberg, V. D., Smith, D., Stancu, I., Strossman, W. H., Tayloe, R., Sung, M., Vernon, W., White, D. H., and Yellin, S.

Subjects
High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, FOS: Physical sciences, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract

A recently developed Standard-Model Extension (SME) formalism for neutrino oscillations that includes Lorentz and CPT violation is used to analyze the sidereal time variation of the neutrino event excess measured by the Liquid Scintillator Neutrino Detector (LSND) experiment. The LSND experiment, performed at Los Alamos National Laboratory, observed an excess, consistent with neutrino oscillations, of ${\bar\nu}_e$ in a beam of ${\bar\nu}_\mu$. It is determined that the LSND oscillation signal is consistent with no sidereal variation. However, there are several combinations of SME coefficients that describe the LSND data; both with and without sidereal variations. The scale of Lorentz and CPT violation extracted from the LSND data is of order $10^{-19}$ GeV for the SME coefficients $a_L$ and $E \times c_L$. This solution for Lorentz and CPT violating neutrino oscillations may be tested by other short baseline neutrino oscillation experiments, such as the MiniBooNE experiment., Comment: 10 pages, 10 figures, 2 tables, uses revtex4 replaced with version to be published in Physical Review D, 11 pages, 11 figures, 2 tables, uses revtex4

Published
2005

2. Search for $\pi^0 \to \nu_{\mu}\bar\nu_{\mu}$ Decay in LSND

Author

Auerbach, L. B., Burman, R. L., Caldwell, D. O., Church, E. D., Cochran, A. K., Donahue, J. B., Fazely, A. R., Garvey, G. T., Gunasingha, R. M., Imlay, R. L., Kahrimanis, G., Louis, W. C., Majkic, R., Malik, A., McIlhany, K. L., Metcalf, W. J., Mills, G. B., Rupnik, D., Sandberg, V. D., Smith, D., Somodi, R. F., Stancu, I., Strossman, W. D., Sung, M., Tayloe, R., VanDalen, G. J., Vernon, W., Wadia, N., White, D. H., Yellin, S., and Yi, H.

Subjects
High Energy Physics::Phenomenology, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract

We observe a net beam-excess of $8.7 \pm 6.3$ (stat) $\pm 2.4$ (syst) events, above 160 MeV, resulting from the charged-current reaction of $\nu_{\mu}$ and/or $\bar\nu_{\mu}$ on C and H in the LSND detector. No beam related muon background is expected in this energy regime. Within an analysis framework of $\pi^0 \to \nu_{\mu}\bar\nu_{\mu}$, we set a direct upper limit for this branching ratio of $\Gamma(\pi^0 \to \nu_\mu \bar\nu_\mu) / \Gamma(\pi^0 \to all) < 1.6 \times 10^{-6}$ at 90% confidence level., Comment: 4 pages, 4 figures

Published
2003

3. Observation of a coherence length effect in exclusive ρ(0) electroproduction

Author

Ackerstaff, K., Airapetian, A., Akopov, N., Akushevich, I., Amarian, M., Aschenauer, E. C., Avakian, H., Avakian, R., Avetissian, A., Bains, B., Barrow, S., Baumgarten, C., Beckmann, M., Belostotski, St., Belz, J. E., Benisch, Th., Bernreuther, S., Bianchi, N., Blanchard, S., Blouw, J., Böttcher, H., Borissov, A., Brack, J., Brauksiepe, S., Braun, B., Bray, B., Brons, St., Brückner, W., Brüll, A., Bruins, E. E. W., Bulten, H. J., Cadman, R. V., Capitani, G. P., Carter, P., Chumney, P., Cisbani, E., Court, G. R., Dalpiaz, P. F., Delheij, P. P. J., De Sanctis, E., De Schepper, D., Devitsin, E., de Witt Huberts, P. K. A., Di Nezza, P., Düren, M., Dvoredsky, A., Elbakian, G., Ely, J., Emerson, J., Fantoni, A., Fechtchenko, A., Ferstl, M., Fick, D., Fiedler, K., Filippone, B. W., Fischer, H., Fortune, H. T., Fox, B., Frabetti, S., Franz, J., Frullani, S., Funk, M.-A., Gagunashvili, N. D., Galumian, P., Gao, H., Gärber, Y., Garibaldi, F., Gavrilov, G., Geiger, P., Gharibyan, V., Giordjian, V., Golendukhin, A., Graw, G., Grebeniouk, O., Green, P. W., Greeniaus, L. G., Grosshauser, C., Guidal, M. G., Gute, A., Gyurjyan, V., Haas, J. P., Haeberli, W., Hansen, J.-O., Hasch, D., Häusser, O., Heinsius, F. H., Henderson, R. S., Henkes, Th., Henoch, M., Hertenberger, R., Holler, Y., Holt, R. J., Hoprich, W., Ihssen, H., Iodice, M., Izotov, A., Jackson, H. E., Jgoun, A., Jones, C., Kaiser, R., Kinney, E., Kirsch, M., Kisselev, A., Kitching, P., Kobayashi, H., Koch, N., Königsmann, K., Kolstein, M., Kolster, H., Korotkov, V., Korsch, W., Kozlov, V., Kramer, L. H., Krause, B., Krivokhijine, V. G., Kückes, M., Kümmell, F., Kyle, G., Lachnit, W., Lorenzon, W., Lung, A., Makins, N. C. R., Martens, F. K., Martin, J. W., Masoli, F., Mateos, A., McAndrew, M., McIlhany, K., McKeown, R. D., Meissner, F., Menden, F., Mercer, D., Metz, A., Meyners, N., Mikloukho, O., Miller, C. A., Miller, M. A., Milner, R. G., Mitsyn, V., Most, A., Mozzetti, R., Muccifora, V., Nagaitsev, A., Naryshkin, Y., Nathan, A. M., Neunreither, F., Niczyporuk, M., Nowak, W.-D., Nupieri, M., Oelwein, P., Ogami, H., O'Neill, T. G., Openshaw, R., Ouyang, J., Owen, B. R., Papavassiliou, V., Pate, S. F., Pitt, M., Poolman, H. R., Potashov, S., Potterveld, D. H., Povh, B., Rakness, G., Reali, A., Redwine, R., Reolon, A. R., Ristinen, R., Rith, K., Roloff, H., Röper, G., Rossi, P., Rudnitsky, S., Ruh, M., Ryckbosch, D., Sakemi, Y., Savin, I., Scarlett, C., Schmidt, F., Schmitt, H., Schnell, G., Schüler, K. P., Schwind, A., Seibert, J., Shibata, T.-A., Shin, T., Shutov, V., Simani, C., Simon, A., Sinram, K., Slavich, P., Sowinski, J., Spengos, M., Steffens, E., Stenger, J., Stewart, J., Stock, F., Stoesslein, U., Sutter, M., Tallini, H., Taroian, S., Terkulov, A., Thiessen, D. M., Thomas, E., Tipton, B., Trudel, A., Tytgat, M., Urciuoli, G. M., van Hunen, J. J., van de Vyver, R., van den Brand, J. F. J., van der Steenhoven, G., Vetterli, M. C., Vikhrov, V., Vincter, M., Visser, J., Volk, E., Wander, W., Welch, T. P., Williamson, S. E., Wise, T., Wölfel, T., Woller, K., Yoneyama, S., Zapfe-Düren, K., Zohrabian, H., and Zurmühle, R.

Subjects
High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Exclusive incoherent electroproduction of the ρ0(770) meson from 1H, 2H, 3He, and 14N targets has been studied by the HERMES experiment at squared four-momentum transfer Q^2>0.4 GeV^2 and positron energy loss ν from 9 to 20 GeV. The ratio of the 14N to 1H cross sections per nucleon, known as the nuclear transparency, was found to decrease with increasing coherence length of quark-antiquark fluctuations of the virtual photon. The data provide clear evidence of the interaction of the quark-antiquark fluctuations with the nuclear medium.

Published
1999

4. Measurements of the reactions 12C + nu_e -> e- + 12N g.s. and 12C + nu_e -> e- + 12N

Author

Athanassopoulos, C., Auerbach, L. B., Burman, R. L., Cohen, I., Caldwell, D. O., Dieterle, B. D., Donahue, J. B., Eisner, A. M., Fazely, A., Federspiel, F. J., Garvey, G. T., Gray, M., Gunasingha, R. M., Imlay, R., Johnston, K., Kim, H. J., Louis, W. C., Majkic, R., Margulies, J., McIlhany, K., Metcalf, W., Mills, G. B., Reeder, R. A., Sandberg, V., Smith, D., Stancu, I., Strossman, W., Tayloe, R., VanDalen, G. J., Vernon, W., Wadia, N., Waltz, J., Wang, Y-X., White, D. H., Works, D., Xiao, Y., and Yellin, S.

Subjects
High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Charged current reactions of nu_e on 12C have been studied using a mu decay-at-rest nu_e beam from the Los Alamos Meson Physics Facility. More than 500 events from the exclusive reaction 12C + nu_e -> e- + 12N g.s. were measured in a large Liquid Scintillator Neutrino Detector (LSND). The observed energy dependence of the cross section and the angular distribution of the outgoing electron agree well with theoretical expectations. Measurements are also presented for inclusive transitions to 12N excited states, 12C + nu_e -> e- + 12N and compared with theoretical expectations. Results are consistent with a recent Continuum Random Phase Approximation (CRPA) calculation., Comment: Figures included with psfig

Published
1997

5. Measurements of the reactions 12C + nu_e -> e- + 12N g.s. and 12C + nu_e -> e- + 12N

Author

Athanassopoulos, C., Auerbach, L. B., Burman, R. L., Cohen, I., Caldwell, D. O., Dieterle, B. D., Donahue, J. B., Eisner, A. M., Fazely, A., Federspiel, F. J., Garvey, G. T., Gray, M., Gunasingha, R. M., Imlay, R., Johnston, K., Kim, H. J., Louis, W. C., Majkic, R., Margulies, J., McIlhany, K., Metcalf, W., Mills, G. B., Reeder, R. A., Sandberg, V., Smith, D., Stancu, I., Strossman, W., Tayloe, R., VanDalen, G. J., Vernon, W., Wadia, N., Waltz, J., Wang, Y-X., White, D. H., Works, D., Xiao, Y., and Yellin, S.

Subjects
High Energy Physics::Phenomenology, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex)
Abstract

Charged current reactions of nu_e on 12C have been studied using a mu decay-at-rest nu_e beam from the Los Alamos Meson Physics Facility. More than 500 events from the exclusive reaction 12C + nu_e -> e- + 12N g.s. were measured in a large Liquid Scintillator Neutrino Detector (LSND). The observed energy dependence of the cross section and the angular distribution of the outgoing electron agree well with theoretical expectations. Measurements are also presented for inclusive transitions to 12N excited states, 12C + nu_e -> e- + 12N and compared with theoretical expectations. Results are consistent with a recent Continuum Random Phase Approximation (CRPA) calculation., Figures included with psfig

Published
1997
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6. Evidence for $\bar\nu_\mu\to\bar\nu_e$ Oscillations from the LSND Experiment at LAMPF

Author

Athanassopoulos, C., Auerbach, L. B., Burman, R. L., Cohen, I., Caldwell, D. O., Dieterle, B. D., Donahue, J. B., Eisner, A. M., Fazely, A., Federspiel, F. J., Garvey, G. T., Gray, M., Gunasingha, R. M., Imlay, R., Johnston, K., Kim, H. J., Louis, W. C., Majkic, R., Margulies, J., McIlhany, K., Metcalf, W., Mills, G. B., Reeder, R. A., Sandberg, V., Smith, D., Stancu, I., Strossman, W., Tayloe, R., VanDalen, G. J., Vernon, W., Wadia, N., Waltz, J., Wang, Y-X., White, D. H., Works, D., Xiao, Y., Yellin, S., and Collaboration, LSND

Subjects
High Energy Physics - Phenomenology, Nuclear Theory, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment, High Energy Physics - Experiment
Abstract

A search for $\bar\nu_{\mu}\to \bar\nu_{e}$ oscillations has been conducted at the Los Alamos Meson Physics Facility by using $\bar\nu_\mu$ from $\mu^+$ decay at rest. The $\bar\nu_e$ are detected via the reaction $\bar\nu_e\,p \rightarrow e^{+}\,n$, correlated with a $\gamma$ from $np\rightarrow d\gamma$ ($2.2\,{\rm MeV}$). The use of tight cuts to identify $e^+$ events with correlated $\gamma$ rays yields 22 events with $e^+$ energy between 36 and $60\,{\rm MeV}$ and only $4.6 \pm 0.6$ background events. A fit to the $e^+$ events between 20 and $60\,{\rm MeV}$ yields a total excess of $51.8^{+18.7}_{-16.9} \pm 8.0$ events. If attributed to $\bar \nu_\mu \rightarrow \bar \nu_e$ oscillations, this corresponds to an oscillation probability of ($0.31^{+0.11}_{-0.10} \pm 0.05$)\%., Comment: 4 pages, 3 figures, revtex, psfig. additional information available at http://nu1.lampf.lanl.gov/~lsnd/

Published
1996

7. Evidence for $\bar��_��\to\bar��_e$ Oscillations from the LSND Experiment at LAMPF

Author

Athanassopoulos, C., Auerbach, L. B., Burman, R. L., Cohen, I., Caldwell, D. O., Dieterle, B. D., Donahue, J. B., Eisner, A. M., Fazely, A., Federspiel, F. J., Garvey, G. T., Gray, M., Gunasingha, R. M., Imlay, R., Johnston, K., Kim, H. J., Louis, W. C., Majkic, R., Margulies, J., McIlhany, K., Metcalf, W., Mills, G. B., Reeder, R. A., Sandberg, V., Smith, D., Stancu, I., Strossman, W., Tayloe, R., VanDalen, G. J., Vernon, W., Wadia, N., Waltz, J., Wang, Y-X., White, D. H., Works, D., Xiao, Y., Yellin, S., and Collaboration, LSND

Subjects
Nuclear Theory (nucl-th), High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), High Energy Physics::Phenomenology, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex)
Abstract

A search for $\bar��_��\to \bar��_{e}$ oscillations has been conducted at the Los Alamos Meson Physics Facility by using $\bar��_��$ from $��^+$ decay at rest. The $\bar��_e$ are detected via the reaction $\bar��_e\,p \rightarrow e^{+}\,n$, correlated with a $��$ from $np\rightarrow d��$ ($2.2\,{\rm MeV}$). The use of tight cuts to identify $e^+$ events with correlated $��$ rays yields 22 events with $e^+$ energy between 36 and $60\,{\rm MeV}$ and only $4.6 \pm 0.6$ background events. A fit to the $e^+$ events between 20 and $60\,{\rm MeV}$ yields a total excess of $51.8^{+18.7}_{-16.9} \pm 8.0$ events. If attributed to $\bar ��_��\rightarrow \bar ��_e$ oscillations, this corresponds to an oscillation probability of ($0.31^{+0.11}_{-0.10} \pm 0.05$)\%., 4 pages, 3 figures, revtex, psfig. additional information available at http://nu1.lampf.lanl.gov/~lsnd/

Published
1996
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8. Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering

Author

Ackerstaff, K., Airapetian, A., Akopov, N., Akushevich, I., Amarian, M., Aschenauer, E. C., Avakian, H., Avakian, R., Avetissian, A., Bains, B., Barrow, S., Baumgarten, C., Beckmann, M., Belostotski, S., Belz, J. E., Benisch, T., Bernreuther, S., Bianchi, N., Blanchard, S., Blouw, J., Böttcher, H., Borissov, A., Brack, J., Bray, B., Brauksiepe, S., Braun, B., Brons, S., Brückner, W., Brüll, A., Bruins, E. E. W., Bulten, H. J., Cadman, R. V., Capitani, G. P., Carter, P., Chumney, P., Cisbani, E., Court, G. R., Dalpiaz, P. F., Leo, R., Delheij, P. P. J., Sanctis, E., Schepper, D., Devitsin, E., Witt Huberts, P. K. A., Di Nezza, P., Düren, M., Dvoredsky, A., Ely, J., Elbakian, G., Emerson, J., Fantoni, A., Fechtchenko, A., Ferstl, M., Fick, D., Fiedler, K., Filippone, B. W., Fischer, H., Fortune, H. T., Fox, B., Frabetti, S., Franz, J., Frullani, S., Funk, M. -A, Gagunashvili, N. D., Galumian, P., Gao, H., Gärber, Y., Garibaldi, F., Gavrilov, G., Geiger, P., Gharibyan, V., Golendukhin, A., Graw, G., Grebeniouk, O., Green, P. W., Greeniaus, L. G., Grosshauser, C., Guidal, M., Gute, A., Gyurjyan, V., Haas, J. P., Haeberli, W., Hansen, J. -O, Hasch, D., Häusser, O., Henderson, R., Heinsius, F. H., Henkes, T., Henoch, M., Hertenberger, R., Holler, Y., Holt, R. J., Hoprich, W., Ihssen, H., Iodice, M., Izotov, A., Jackson, H. E., Jgoun, A., Jones, C., Kaiser, R., Kestel, M., Kinney, E., Kirsch, M., Kisselev, A., Kitching, P., Kobayashi, H., Koch, N., Königsmann, K., Kolstein, M., Kolster, H., Korotkov, V., Korsch, W., Kozlov, V., Kramer, L. H., Krause, B., Krivokhijine, V. G., Kückes, M., Kümmell, F., Kurisuno, M., Kyle, G., Lachnit, W., Lorenzon, W., Lung, A., Makins, N. C. R., Martens, F. K., Martin, J. W., Marukyan, H., Masoli, F., Mateos, A., Maul, M., Mcandrew, M., Mcilhany, K., Mckeown, R. D., Meissner, F., Menden, F., Mercer, D., Metz, A., Meyners, N., Mikloukho, O., Miller, C. A., Miller, M. A., Milner, R., Mitsyn, V., Most, A., Mozzetti, R., Muccifora, V., Nagaitsev, A., Nappi, E., Naryshkin, Y., Nathan, A. M., Neunreither, F., Niczyporuk, J. M., Nowak, W. -D, Nupieri, M., Oelwein, P., Ogami, H., O Neill, T. G., Openshaw, R., Owen, B. R., Ouyang, J., Papavassiliou, V., Pate, S. F., Pitt, M., Poolman, H. R., Potashov, S., Potterveld, D. H., Rakness, G., Reali, A., Redwine, R., Reolon, A. R., Ristinen, R., Rith, K., Röper, G., Rossi, P., Rudnitsky, S., Ruh, M., Ryckbosch, D., Sakemi, Y., Savin, I., Scarlett, C., Schafer, A., Schmidt, F., Schmitt, H., Schnell, G., Schüler, K. P., Schwind, A., Seibert, J., Shibata, T. -A, Shibatani, K., Shin, T., Shutov, V., Simani, C., Simon, A., Sinram, K., Slavich, P., Smythe, W. R., Sowinski, J., Spengos, M., Steffens, E., Stenger, J., Stewart, J., Stock, F., Stoesslein, U., Sutter, M., Tallini, H., Taroian, S., Terkulov, A., Thiessen, D. M., Tipton, B., Thomas, E., Trudel, A., Michael Tytgat, Urciuoli, G. M., Hunen, J. J., Vyver, R., Den Brand, J. F. J., Steenhoven, G., Vetterli, M. C., Vikhrov, V., Vincter, M., Visser, J., Volk, E., Wander, W., Welch, T. P., Wendland, J., Williamson, S. E., Wise, T., Woller, K., Yoneyama, S., Zapfe, K., Zohrabian, H., and Zurmühle, R.

Subjects
Quark, Nuclear and High Energy Physics, Particle physics, High Energy Physics::Lattice, Hadron, FOS: Physical sciences, Down quark, PRECISION-MEASUREMENT, SUM-RULE, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), MUON-PROTON-SCATTERING, ASYMMETRIES, 0103 physical sciences, STRUCTURE-FUNCTION G(1)(N), 010306 general physics, HE-3, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Lattice QCD, Deep inelastic scattering, SPIN STRUCTURE-FUNCTION, DEUTERON, GLOBAL ANALYSIS, PARTON DISTRIBUTIONS, Isospin, Up quark, High Energy Physics::Experiment, Nucleon
Abstract

Spin asymmetries of semi-inclusive cross sections for the production of positively and negatively charged hadrons have been measured in deep-inelastic scattering of polarized positrons on polarized hydrogen and 3He targets, in the kinematic range 0.023, Comment: 14 pages, 6 figures (eps format), 10 tables in Latex New version contains tables of asymmetries and correlation matrix

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