Experimental investigation of the two-photon widths of the chi(c0) and thechi(c2) mesons - art. no. 061801

Authors
Eisenstein, BI Ernst, J Gladding, GE Gollin, GD Hans, RM Johnson, E Karliner, I 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 Athar, SB 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 Richichi, SJ Severini, H Skubic, P Undrus, A Savinov, V Chen, S Hinson, JW Lee, J Miller, DH Shibata, EI Shipsey, IPJ Pavlunin, V Cronin-Hennessy, D Lyon, AL Thorndike, EH Coan, TE Fadeyev, V Gao, YS Maravin, Y Narsky, I Stroynowski, R Ye, J Wlodek, T Artuso, M Benslama, K Boulahouache, C Bukin, K Dambasuren, E Majumder, G Mountain, R Skwarnicki, T Stone, S Wang, JC Wolf, A 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 Asner, DM Eppich, A Hill, TS Morrison, RJ Briere, RA Chen, GP Ferguson, T Vogel, H Alexander, JP Bebek, C Berger, BE Berkelman, K Blanc, F Boisvert, V Cassel, DG Drell, PS Duboscq, JE Ecklund, KM Ehrlich, R Gaidarev, P 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, HJ Meyer, TO Mistry, NB Nordberg, E Palmer, M Patterson, JR Peterson, D Riley, D Romano, A Schwarthoff, H Thayer, JG Urner, D Valant-Spaight, B Viehhauser, G Warburton, A Avery, P Prescott, C Rubiera, AI Stoeck, H Yelton, J Brandenburg, G Ershov, A Kim, DYJ Wilson, R
Citation
Bi. Eisenstein et al., Experimental investigation of the two-photon widths of the chi(c0) and thechi(c2) mesons - art. no. 061801, PHYS REV L, 8706(6), 2001, pp. 1801
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
8706
Issue
6
Year of publication
2001
Database
ISI
SICI code
0031-9007(20010806)8706:6<1801:EIOTTW>2.0.ZU;2-S
Abstract
Using 12.7 fb(-1) of data collected with the CLEO detector at CESR, we obse rved two-photon production of the c (c) over bar states chi (c0) and chi (c 2) in their decay to pi (+)pi (-)pi (+)pi (-). We measured Gamma (gamma gam ma)(chi (c)) x B(chi (c) --> pi (+)pi (-)pi (+)pi (-)) to be 75 +/- 13(stat ) +/-8(syst) eV for the chi (c0) and 6.4 =/- 1.8(stat) +/- 0.8(syst) eV for the chi (c2), implying Gamma (gamma gamma)(chi (c0)) = 3.76 +/- 0.65(stat) +/- 0.41(syst) +/- 1.69(br) keV and Gamma (gamma gamma)(chi (c2)) = 0.53 /- 0.15(stat) +/-0.06(syst) +/-0.22(br) keV. Also, cancellation of dominant experimental and theoretical uncertainties permits a precise comparison of Gamma (gamma gamma)(chi (c0))/Gamma (gamma gamma)(chi (c2)), evaluated to be 7.4 +/- 2.4(stat) +/- 0.5(syst) +/-0.9(br), with QCD-based predictions.