Measurement of the mass splittings between the b(b)over-bar chi(b,J)(1P) states - art. no. 032003

Authors
Edwards, KW Bellerive, A Janicek, R MacFarlane, DB Patel, PM Sadoff, AJ Ammar, R Baringer, P Bean, A Besson, D Coppage, D Darling, C Davis, R Kotov, S Kravchenko, I Kwak, N Zhou, L Anderson, S Kubota, Y Lee, SJ O'Neill, JJ Poling, R Riehle, T Smith, A Alam, MS Athar, SB Ling, Z Mahmood, AH Timm, S Wappler, F Anastassov, A Duboscq, JE Fujino, D Gan, KK Hart, T Honscheid, K Kagan, H Kass, R Lee, J Schwarthoff, H Spencer, MB Sung, M Undrus, A Wolf, A Zoeller, MM Richichi, SJ Severini, H Skubic, P Bishai, M Fast, J Hinson, JW Menon, N Miller, DH Shibata, EI Shipsey, IPJ Yurko, M Glenn, S Kwon, Y Lyon, AL Roberts, S Thorndike, EH Jessop, CP Lingel, K Marsiske, H Perl, ML Savinov, V Ugolini, D Zhou, X Coan, TE Fadeyev, V Korolkov, I Maravin, Y Narsky, I Shelkov, V Staeck, J Stroynowski, R Volobouev, I Ye, J Artuso, M Azfar, F Efimov, A Goldberg, M He, D Kopp, S Moneti, GC Mountain, R Schuh, S Skwarnicki, T Stone, S Viehhauser, G Wang, JC Xing, X Bartelt, J Csorna, SE Jain, V McLean, KW Marka, S Godang, R Kinoshita, K Lai, IC Pomianowski, P Schrenk, S Bonvicini, G Cinabro, D Greene, R Perera, LP Zhou, GJ Chadha, M Chan, S Eigen, G Miller, JS Schmidtler, M Urheim, J Weinstein, AJ Wurthwein, F Bliss, DW Jaffe, DE Masek, G Paar, HP Prell, S Sharma, V Asner, DM Gronberg, J Hill, TS Lange, DJ Morrison, RJ Nelson, HN Nelson, TK Roberts, D Behrens, BH Ford, WT Gritsan, A Roy, J Smith, JG Alexander, JP Baker, R Bebek, C Beger, BE Berkelman, K Bloom, K Boisvert, V Cassel, DG Crowcroft, DS Dickson, M von Dombrowski, S Drell, PS Ecklund, KM Ehrlich, R Foland, AD Gaidarev, P Galik, RS Gibbons, L Gittelman, B Gray, SW Hartill, DL Heltsley, BK Hopman, PI Kandaswamy, J Kreinick, DL Lee, T Liu, Y Mistry, NB Ng, CR Nordberg, E Ogg, M Patterson, JR Peterson, D Riley, D Soffer, A Valant-Spaight, B Ward, C Athanas, M Avery, P Jones, CD Lohner, M Patton, S Prescott, C Yelton, J Zheng, J Brandenburg, G Briere, RA Ershov, A Gao, YS Kim, DYJ Wilson, R Yamamoto, K Browder, TE Li, Y Rodriguez, JL Bergfeld, T Eisenstein, BI Ernst, J Gladding, GE Gollin, GD Hans, RM Johnson, E Karliner, I Marsh, MA Palmer, M Selen, M Thaler, JJ
Citation
Kw. Edwards et al., Measurement of the mass splittings between the b(b)over-bar chi(b,J)(1P) states - art. no. 032003, PHYS REV D, 5903(3), 1999, pp. 2003
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
5903
Issue
3
Year of publication
1999
Database
ISI
SICI code
0556-2821(19990201)5903:3<2003:MOTMSB>2.0.ZU;2-G
Abstract
We present new measurements of photon energies and branching fractions for the radiative transitions Y(2S) --> gamma chi(b(J=0,1,2))(1P). The masses o f the chi(b) states are determined from the measured radiative photon energ ies. The ratio of mass splittings between the chi(b) substates, r=(M-J=2-M- J=1)/(M-J=1 - M-J=0), with M the chi(b) mass, provides information on the n ature of the b (b) over bar confining potential. We find r(1P)=0.542 +/- 0. 022+/-0.024. This value is somewhat lower than the previous world average, but more consistent with the theoretical expectation that r(1P)< r(2P); i.e ., that this mass splitting ratio is smaller for the chi(b)(1P) States than for the chi(b)(2P) states. [S0556-2821(99)02903-3].