Search for the decay of a B0 or B0bar meson to K*0bar K0 or K*0 K0bar

Aubert, B.

Stanford Linear Accelerator Center

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

DOI  :  10.2172/885279
RP-ID  :  SLAC-PUB-11915
RP-ID  :  AC02-76SF00515
RP-ID  :  885279

美国|英语

来源: UNT Digital Library

【 摘 要 】

The authors present a search for the decay of a B{sup 0} or {bar B}{sup 0} meson to a {bar K}*{sup 0} K{sup 0} or K*{sup 0} {bar K}{sup 0} final state, using a sample of approximately 232 million B{bar B} events collected with the BABAR detector at the PEP-II asymmetric energy e{sup +}e{sup -} collider at SLAC. The measured branching fraction is {Beta}(B{sup 0} {yields} {bar K}*{sup 0} K{sup 0}) + {Beta}(B{sup 0} {yields} K*{sup 0} {bar K}{sup 0}) = (0.2{sub -0.8, -0.3}{sup +0.9, +0.1}) x 10{sup -6}. They obtain the following upper limit for the branching fraction at 90% confidence level: {Beta}(B{sup 0} {yields} {bar K}*{sup 0} K{sup 0}) + {Beta}(B{sup 0} {yields} K*{sup 0} {bar K}{sup 0}) < 1.9 x 10{sup -6}. They use our result to constrain the Standard Model prediction for the deviation of the CP asymmetry in B{sup 0} {yields} {phi}K{sup 0} from sin 2{beta}.