Analysis of B -> omega lv Decays with BaBar (SULI)

Chu, Yi-Wen ; /MIT ; Littlejohn, B. ; /Unlisted ; Dingfelder, J. ; /SLAC

Stanford Linear Accelerator Center

关键词: B Mesons;    Stanford Linear Accelerator Center Experiment-Hep,Hepex;    43 Particle Accelerators;    Matrix Elements;    Neutrinos;   

DOI  :  10.2172/877480
RP-ID  :  SLAC-TN-05-057
RP-ID  :  AC02-76SF00515
RP-ID  :  877480

美国|英语

来源: UNT Digital Library

【 摘 要 】

As part of the BaBar project at SLAC to study the properties of B mesons, we have carried out a study of the exclusive charmless semileptonic decay mode B {yields} wlv, which can be used to determine the Cabbibo-Kobayashi-Maskawa matrix element V{sub ub}. Using simulated event samples, this study focuses on determining criteria on variables for selection of B {yields} wlv signal and suppression of background from other types of B{bar B} events and continuum processes. In addition, we determine optimal cuts on variables to ensure a good neutrino reconstruction. With these selection cuts, we were able to achieve a signal-to-background ratio of 0.68 and a signal efficiency of the order of 1%. Applying these cuts to a sample of 83 million B{bar B} events recorded by BaBar in e{sup +}e{sup -} collisions at the {Upsilon}(4S) resonance, we obtain a yield of 115 {+-} 19 B {yields} wlv decays.