Improved upper limits on the flavor-changing neutral current decays B -> Kl(+)l(-) and B -> K*(892)l(+)l(-) - art. no. 181803

Authors
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 Kwon, Y Lyon, AL Park, W Thorndike, EH Coan, TE 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 Bonivicini, G Cinabro, D Dubrovin, M McGee, S Bornheim, A Eigen, G Lipeles, E Pappas, SP Shapiro, A Sun, WM Weinstein, AJ Jaffe, DE Mahapatra, R Masek, G Paar, HP Eppich, A 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 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 Riley, D Romano, A Schwarthoff, H Thayer, JG Urner, D Valant-Spaight, B Viehhauser, G Warburton, A Avery, P Preseott, C Rubiera, AI Stoeck, H Yelton, J Brandenburg, G Ershov, A Kim, DYJ Wilson, R 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
Citation
S. Anderson et al., Improved upper limits on the flavor-changing neutral current decays B -> Kl(+)l(-) and B -> K*(892)l(+)l(-) - art. no. 181803, PHYS REV L, 8718(18), 2001, pp. 1803
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
8718
Issue
18
Year of publication
2001
Database
ISI
SICI code
0031-9007(20011029)8718:18<1803:IULOTF>2.0.ZU;2-2
Abstract
We have searched a sample of 9.6 x 10(6) B(B) over bar events for the flavo r-changing neutral current decays B --> Kl(+)l(-) and B --> K*(892)l(+)l(-) . We subject the latter decay to the requirement that the dilepton mass m(l l) exceed 0.5 GeV. There is no indication of a signal. We obtain the 90% co nfidence level upper limits B (B --> Kl(+)l(-)) < 1.7 x 10(-6) and B(B <rig ht arrow> K*(892)l(+)l(-))m(ll>0.5GeV) < 3.3 x 10(-6). We also obtain an up per limit on the weighted average 0.65B(B <right arrow> Kl(+)l(-)) + 0.35B( B --> K*(892)l(+)l(-))m(ll>0.5GeV) < 1.5 x 10(-6). The weighted-average lim it is only 50% above the standard model prediction.