Search for the decay Y(1S) - gamma eta ' - art. no. 141801

Authors
Richichi, SJ Severini, H Skubic, P Dytman, SA Savinov, V Chen, S Hinson, JW Lee, J Miller, DH Shibata, EI Shipsey, IPJ Pavlunin, V Cronin-Hennessy, D Lyon, AL Park, W Thorndike, EH Coan, TE Gao, YS Liu, F Maravin, Y Narsky, I Stroynowski, R Ye, J Artuso, M Boulahouache, C Bukin, K Dambasuren, E Majumder, G Mountain, R Skwarnicki, T Stone, S Wang, JC Zhao, H Kopp, S Kostin, M Mahmood, AH Csorna, SE Danko, I McLean, KW Xu, Z Godang, R Bonvicini, G Cinabro, D Dubrovin, M McGee, S Bornheim, A Lipeles, E Pappas, SP Shapiro, A Sun, WM Weinstein, AJ Jaffe, DE Mahapatra, R Masek, G Paar, HP Morrison, RJ Briere, RA Chen, GP Ferguson, T Vogel, H Alexander, JP Bebek, C Berkelman, K Blanc, F Boisvert, V Cassel, DG Drell, PS Duboscq, JE Ecklund, KM Ehrlich, R Galik, RS Gibbons, L Gittelman, B Gray, SW Hartill, DL Heltsley, BK Hsu, L Jones, CD Kandaswamy, J Kreinick, DL Lohner, M Magerkurth, A Mahlke-Kruger, H Meyer, TO Mistry, NB Nordberg, E Palmer, M Patterson, JR Peterson, D Pivarski, J Riley, D Schwarthoff, H Thayer, JG Urner, D Valant-Spaight, B Viehhauser, G Warburton, A Weinberger, M Athar, SB Avery, P Prescott, C Stoeck, H Yelton, J Brandenburg, G Ershov, A Kim, DYJ Wilson, R Benslama, K Eisenstein, BI Ernst, J Gladding, GE Gollin, GD Hans, RM Karliner, I Lowrey, NA Marsh, MA Plager, C Sedlack, C Selen, M Thaler, JJ Williams, J Edwards, KW Sadoff, AJ Ammar, R Bean, A Besson, D Zhao, X Anderson, S Frolov, VV Kubota, Y Lee, SJ Poling, R Smith, A Stepaniak, CJ Urheim, J Ahmed, S Alam, MS Jian, L Ling, L Saleem, M Timm, S Wappler, F Anastassov, A Eckhart, E Gan, KK Gwon, C Hart, T Honscheid, K Hufnagel, D Kagan, H Kass, R Pedlar, TK Thayer, JB von Toerne, E Zoeller, MM
Citation
Sj. Richichi et al., Search for the decay Y(1S) - gamma eta ' - art. no. 141801, PHYS REV L, 8714(14), 2001, pp. 1801
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
8714
Issue
14
Year of publication
2001
Database
ISI
SICI code
0031-9007(20011001)8714:14<1801:SFTDY->2.0.ZU;2-1
Abstract
We report on a search for the radiative decay Y(1S) --> gamma eta' in 61.3 pb(-1) of data taken with the CLEO II detector at the Cornell Electron Stor age Ring. Three decay chains were investigated, all involving eta' --> pi ( +) pi (-) eta, followed by eta --> gamma gamma, eta --> pi (0)pi (0)pi (0), or eta --> pi (+) pi (-) pi (0). We find no candidate events in any of the three cases and set a combined upper limit of 1.6 X 10(-5) at 90% C.L., si gnificantly smaller than the previous limit. We compare our result to other radiative Y decays, to radiative J/psi decays, and to theoretical predicti ons.