Measurement of the Branching Fraction of the Semileptonic Decay Anti-B0 ---> D*+ Mu- Anti-Muon-Neutrino in the BaBar Experiments

Thiessen, Douglas Michael ; U., /British Columbia

Stanford Linear Accelerator Center

关键词: Decay;    B Mesons;    Stanford Linear Accelerator Center Experiment-Hep,Hepex;    43 Particle Accelerators;    C Quarks;   

DOI  :  10.2172/878782
RP-ID  :  SLAC-R-775
RP-ID  :  AC02-76SF00515
RP-ID  :  878782

美国|英语

来源: UNT Digital Library

【 摘 要 】

This thesis presents a measurement of the branching fraction for the exclusive semileptonic decay {bar B}{sup 0} {yields} D*{sup +}{mu}{sup -}{nu}{sub {mu}}. This decay is essentially the decay of a b quark to a c quark inside the meson with the release of a muon and neutrino, and it provides a very clean signal for measuring various B meson decay properties. the data for this measurement consist of 22.3 million B{bar B} pairs collected by the BABAR detector at the Stanford Linear Accelerator Center in 1999-2000. The branching fraction is measured to be {Beta}({bar B}{sup 0} {yields} D*{sup +}{mu}{sup -}{bar {nu}}{sub {mu}}) = [4.72 {+-} 0.10 (data stat.) {+-} 0.06 (MC stat.) {+-} 0.20 (syst.) {+-} 0.17 (other {Beta})]%.