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Study of Direct CP Violation in B(±)→J/ψK(±)(π(±)) Decays
Baringer, Philip S. Bean, Alice Hensel, Carsten Moulik, Tania Wilson, Graham Wallace Abazov, V. M. Abbott, B. Abolins, M. Acharya, B. S. Adams, M.
Baringer, Philip S.
Bean, Alice
Hensel, Carsten
Moulik, Tania
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
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Abstract
We present a search for direct CP violation in B(±)→J/ψK(±)(π(±)) decays. The event sample is selected from 2.8 fb(−1) of pp-bar collisions recorded by D0 experiment in run II of the Fermilab Tevatron Collider. The charge asymmetry ACP(B(+)→J/ψK(+))=+0.0075±0.0061(stat)±0.0030(syst) is obtained using a sample of approximately 40 000 B(±)→J/ψK(±) 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 ACP(B(+)→J/ψπ(+))=−0.09±0.08(stat)±0.03(syst).
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This is the publisher's version, also available electronically from http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.100.211802.
Date
2008-05-30
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American Physical Society
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V. M. Abazov et al. (D0 Collaboration). (2008). "Study of Direct CP Violation in B(±)→J/ψK(±)(π(±)) Decays." Physical Review Letters, 100(21):211802. http://dx.doi.org/10.1103/PhysRevLett.100.211802