Search for radiative decays ofΥ(1S)intoηandη′
| العنوان: | Search for radiative decays ofΥ(1S)intoηandη′ |
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| المؤلفون: | J. P. Cummings, D. Z. Besson, T. K. Pedlar, N. Lowrey, J. Insler, Marina Artuso, P. Naik, R. Gray, D. Cinabro, C. D. Jones, B. Xin, E. H. Thorndike, Amiran Tomaradze, Karl Berkelman, H. Muramatsu, Hans J. Vogel, Junjie Chen, O. Aquines, D. Cronin-Hennessy, I. Danko, C. Cawlfield, G. Bonvicini, C. Sedlack, S. Mehrabyan, J. C. Wang, K. Y. Gao, J. P. Alexander, James E Wiss, Z. Li, Z. Metreveli, Sheldon Stone, Anders Ryd, A. Lincoln, D. G. Cassel, V. Potlia, M. R. Shepherd, Juliet Ritchie Patterson, R. Redjimi, L. K. Gibbons, N. E. Adam, B. K. Heltsley, R. S. Galik, C. S. Park, J. E. Ramirez, S. B. Athar, R. Patel, D. Hertz, H. Mendez, Kamal K. Seth, L. Fields, Mats A Selen, D. L. Kreinick, Thomas Ferguson, V. E. Kuznetsov, E. J. White, Dong-Hyun Kim, A. J. Sadoff, J. A. Ernst, Y. S. Gao, I. P.J. Shipsey, M. E. Watkins, T. Wilksen, J. Kandaswamy, X. Shi, S. A. Dytman, T. E. Coan, S. Stroiney, G. S. Huang, V. Savinov, Horst Severini, I. Karliner, John Yelton, D. Peterson, Jonathan L. Rosner, Tomasz Skwarnicki, J. Hietala, T. Klein, J. Pivarski, Li Jingyuan, K. Randrianarivony, D. T. Gong, D. L. Hartill, Peter K. Zweber, F. Liu, M. Anderson, B. I. Eisenstein, Werner Sun, R. Ehrlich, S. W. Gray, N. Menaa, K. M. Ecklund, H. Stoeck, A. Lopez, W. Love, R. A. Briere, H. Mahlke-Krüger, S. Nisar, Sean A Dobbs, K. W. Edwards, Peter Onyisi, S. Blusk, B. Sanghi, J. E. Duboscq, R. Poling, Q. He, D. M. Asner, V. Pavlunin, R. Mountain, A. W. Scott, H. Schwarthoff, D. Riley, M. Dubrovin, I. C. Brock, Yuichi Kubota, M. Weinberger, G. S. Adams, S. E. Csorna, K. Zhang, B. W. Lang, D. H. Miller, P. Rubin, R. Sia, J. Butt, J. Napolitano, A. Smith, G. Tatishvili, T. O. Meyer |
| المصدر: | Physical Review D. 76 |
| بيانات النشر: | American Physical Society (APS), 2007. |
| سنة النشر: | 2007 |
| مصطلحات موضوعية: | Physics, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Radiative decay, 01 natural sciences, Particle identification, Pseudoscalar, Crystallography, 0103 physical sciences, Radiative transfer, High Energy Physics::Experiment, Cornell Electron Storage Ring, Atomic physics, Nuclear Experiment, 010306 general physics |
| الوصف: | We report on a search for the radiative decay of {upsilon}(1S) to the pseudoscalar mesons {eta} and {eta}{sup '} in (21.2{+-}0.2)x10{sup 6} {upsilon}(1S) decays collected with the CLEO III detector at the Cornell Electron Storage Ring. The {eta} meson was reconstructed in the three modes {eta}{yields}{gamma}{gamma}, {eta}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0}, or {eta}{yields}{pi}{sup 0}{pi}{sup 0}{pi}{sup 0}. The {eta}{sup '} meson was reconstructed in the mode {eta}{sup '}{yields}{pi}{sup +}{pi}{sup -}{eta} with {eta} decaying through any of the above three modes, and also {eta}{sup '}{yields}{gamma}{rho}{sup 0}, where {rho}{sup 0}{yields}{pi}{sup +}{pi}{sup -}. Five out of the seven submodes are found to have very low backgrounds. In four of them we find no signal candidates and in one [{upsilon}(1S){yields}{gamma}{eta}{sup '}, {eta}{sup '}{yields}{pi}{sup +}{pi}{sup -}{eta}, {eta}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0}] there are two good signal candidates, which is insufficient evidence to claim a signal. The other two submodes ({eta}{yields}{gamma}{gamma} and {eta}{sup '}{yields}{gamma}{rho}) are background limited, and show no excess of events in their signal regions. We combine the results from different channels and obtain upper limits at the 90% C.L. which are B({upsilon}(1S){yields}{gamma}{eta}) |
| تدمد: | 1550-2368 1550-7998 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::fe84626f835bc133a502284eff486b54Test https://doi.org/10.1103/physrevd.76.072003Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi...........fe84626f835bc133a502284eff486b54 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15502368 15507998 |
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