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 |
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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.
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