Study Of The B-0 Semileptonic Decay Spectrum At The Y(4s) Resonance

M Artuso, A Efimov,F Frasconi,M Gao,M Goldberg, D He,S Kopp,Gc Moneti, R Mountain,Y Mukhin, S Schuh, T Skwarnicki,S Stone, G Viehhauser, X Xing, J Bartelt,Se Csorna, V Jain,S Marka,A Freyberger,R Godang, K Kinoshita,Ic Lai, P Pomianowski, S Schrenk, G Bonvicini, D Cinabro, R Greene,Lp Perera, B Barish, M Chadha, S Chan, G Eigen,Js Miller, C Ogrady, M Schmidtler, J Urheim,Aj Weinstein, F Wurthwein, D Asner, Dw Bliss,Ws Brower, G Masek,Hp Paar, V Sharma, J Gronberg, R Kutschke,Dj Lange, S Menary,Rj Morrison,Hn Nelson,Tk Nelson, C Qiao,Jd Richman, D Roberts, A Ryd,Ms Witherell, R Balest,Bh Behrens, K Cho,Wt Ford, H Park, P Rankin, J Roy,Jg Smith,Jp Alexander, C Bebek,Be Berger, K Berkelman,K Bloom,Dg Cassel,Ha Cho,Dm Coffman,Ds Crowcroft, M Dickson,Ps Drell,Km Ecklund, R Ehrlich, R Elia,Ad Foland, P Gaidarev, B Gittelman,Sw Gray,Dl Hartill,Bk Heltsley,Pi Hopman, J Kandaswamy, N Katayama,Pc Kim,Dl Kreinick, T Lee, Y Liu,Gs Ludwig, J Masui, J Mevissen,Nb Mistry,Cr Ng, E Nordberg, M Ogg,Jr Patterson, D Peterson, D Riley, A Soffer, C Ward, M Athanas, P Avery,Cd Jones, M Lohner, C Prescott, S Yang, J Yelton, J Zheng, G Brandenburg,Ra Briere, Ys Gao,Dyj Kim, R Wilson, H Yamamoto,Te Browder, F Li, Y Li,Jl Rodriguez, T Bergfeld,Bi Eisenstein, J Ernst,Ge Gladding,Gd Gollin,Rm Hans, E Johnson, I Karliner,Ma Marsh, M Palmer, M Selen,Jj Thaler,Kw Edwards,A Bellerive, R Janicek,Db Macfarlane,Kw Mclean,Pm Patel,Aj Sadoff, R Ammar, P Baringer, A Bean, D Besson, D Coppage, C Darling, R Davis, N Hancock, S Kotov, I Kravchenko, N Kwak, S Anderson, Y Kubota, M Lattery,Jj Oneill, S Patton, R Poling, T Riehle, V Savinov, A Smith,Ms Alam, Sb Athar, Z Ling,Ah Mahmood, H Severini, S Timm, F Wappler, A Anastassov, S Blinov,Je Duboscq, Kd Fisher, D Fujino, R Fulton,Kk Gan, T Hart, K Honscheid, H Kagan, R Kass, J Lee, Mb Spencer, M Sung, A Undrus, R Wanke, A Wolf,Mm Zoeller, B Nemati,Sj Richichi,Wr Ross, P Skubic, M Wood, M Bishai,J Fast, E Gerndt,Jw Hinson, N Menon, Dh Miller,Ei Shibata,Ipj Shipsey, M Yurko, L Gibbons,Sd Johnson, J Kwon, S Roberts,Eh Thorndike,Cp Jessop, K Lingel, H Marsiske,Ml Perl,Sf Schaffner, D Ugolini, R Wang, X Zhou, Te Coan, V Fadeyev, I Korolkov, Y Maravin, I Narsky, V Shelkov, J Staeck, R Stroynowski, I Volobouev, J Ye

PHYSICS LETTERS B（1997）

引用 8|浏览6

暂无评分

摘要

We have made a first measurement of the lepton momentum spectrum in a sample of events enriched in neutral B's through a partial reconstruction of B-0 --> D*(-)l(+)<(nu)over bar>. This spectrum, measured with 2.38 fb(-1) of data collected at the Y(4S) resonance by the CLEO II detector, is compared directly to the inclusive lepton spectrum from all Y(4S) events in the same data set. These two spectra are consistent with having the same shape above 1.5 GeV/c. From the two spectra and two other CLEO measurements, we obtain the B-0 and B+ semileptonic branching fractions, b(0) and b(+), their ratio, and the production ratio f(+-)/f(00) of B+ and B-0 pairs at the Y(4S). We report b(+)/b(0) = 0.950(-0.080) (+0.117) +/- 0.091, b(0) = (10.78 +/- 0.60 +/- 0.69)%, and b(+) = (10.25 +/- 0.57 +/- 0.65)%. b(+)/b(0) is equivalent to the ratio of charged to neutral B lifetimes, tau(+)/tau(0). (C) 1997 Published by Elsevier Science B.V.

查看译文

关键词

spectrum,data collection

AI 理解论文

溯源树

样例

生成溯源树，研究论文发展脉络

Chat Paper

正在生成论文摘要