Search for CP violating charge asymmetry in B^+ -> J/psi K^+ decays
K. Sakai, T. Kawasaki, H. Aihara, K. Arinstein, T. Aushev, A. M., Bakich, V. Balagura, E. Barberio, K. Belous, V. Bhardwaj, B. Bhuyan, M., Bischofberger, A. Bondar, A. Bozek, M. Bra\v{c}ko, T. E. Browder, M.-C., Chang, Y. Chao, A. Chen, K.-F. Chen, P. Chen, B. G. Cheon
TL;DR
This paper reports a search for CP violation in B^+ -> J/psi K^+ decays, measuring the charge asymmetry to test the Standard Model's predictions of CP violation effects.
Contribution
It provides the first precise measurement of CP asymmetry in B^+ -> J/psi K^+ decays with improved statistical and systematic uncertainties.
Findings
Measured CP asymmetry: -0.76% with uncertainties
Results consistent with Standard Model predictions
Sets constraints on new physics models
Abstract
We present the result of a search for charge asymmetry in B^+ -> J/psi K^+ decays. The CP-violating charge asymmetry is measured to be A_CP(B^+ -> J/psi K^+) = [-0.76 +/- 0.50 (stat) +/- 0.22 (syst)]%.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Computational Physics and Python Applications