Study of Branching Ratio And Polarization Fraction in Neutral B Meson Decays to Negative Rho Meson Positive Kaon Resonance

Cheng, Baosen

Stanford Linear Accelerator Center

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

DOI  :  10.2172/877225
RP-ID  :  SLAC-R-806
RP-ID  :  AC02-76SF00515
RP-ID  :  877225

美国|英语

来源: UNT Digital Library

【 摘 要 】

We present the preliminary results on the search for B{sup 0} {yields} {rho}{sup -}K*{sup +}. The data sample comprises 122.7 million B{bar B} pairs in the e{sup +}e{sup -} annihilation through the {Upsilon}(4S) resonance collected during 1999-2003 with the BABAR detector at the PEP-II asymmetric-energy collider at Stanford Linear Accelerator Center (SLAC). We obtain an upper limit of the branching ratio at 90% confidence level as {Beta}(B{sup 0} {yields} {rho}{sup -}K*{sup +}) < 17.2 x 10{sup -6}. The fitted result on the polarization fraction shows no evidence that the decay is longitudinally dominated as predicted by various theoretical models.