Study of direct CP violation in $B^{\pm }\to J/\psi K^{\pm }({\pi }^{\pm })$ decays

Abstract

We present a search for direct CP violation in $B^{\pm }\to J/\psi K^{\pm }({\pi }^{\pm })$ decays. The event sample is selected from 2.8 fb${}^{-1}$ of $p\bar{p}$ collisions recorded by D0 experiment in Run II of the Fermilab Tevatron Collider. The charge asymmetry $A_{CP}(B^{+}\to J/\psi K^{+})=+0.0075\pm 0.0061$(stat.)$\pm 0.0027$(syst.) is obtained using a sample of approximately 40 thousand $B^{\pm }\to J/\psi K^{\pm }$ decays. The achieved precision is of the same level as the expected deviation predicted by some extensions of the standard model. We also measured the charge asymmetry $A_{CP}(B^{+}\to J/\psi {\pi }^{+})=-0.09\pm 0.08$(stat.)$\pm 0.03$(syst.).

7 pages, 3 figures

References in corpus (3)

• Observation and Properties of L=1 B_1 and B_2* Mesons
• Measurement of the CP-violation parameter of B^0 mixing and decay with pp(bar) -> mu mu X data
• Measurement of the charge asymmetry in semileptonic Bs decays

Cited by in corpus (6)

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• Measurements of the branching fractions and CP asymmetries of B+ to J/psi pi+ and B+ to psi(2S) pi+ decays
• Search for CP violating charge asymmetry in B^+ -> J/psi K^+ decays
• Search for TeV Scale Physics in Heavy Flavour Decays
• B-physics results from Tevatron
• Review of Physics Results from the Tevatron: Heavy Flavor Physics