TY - JOUR

T1 - Study of direct CP violation in $B^{\pm} \to J/ψK^{\pm}(π^{\pm})$ decays

AU - Collaboration, D0

AU - Abazov, V.

AU - Bertram, Iain

AU - Williams, Mark

AU - Borissov, Guennadi

AU - Ratoff, Peter

AU - Fox, Harald

N1 - © 2008 The American Physical Society

PY - 2008/2/22

Y1 - 2008/2/22

N2 - 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.).

AB - 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.).

UR - http://www.scopus.com/inward/record.url?scp=44649097173&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.100.211802

DO - 10.1103/PhysRevLett.100.211802

M3 - Journal article

VL - 100

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 21

M1 - 211802

ER -