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Study of direct CP violation in B-+/--> J/psi K-+/-(pi(+/-)) decays
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2008 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 100, no 21, 211802- p.Article in journal (Refereed) Published
Abstract [en]

We present a search for direct CP violation in B-+/- -> J/psi K-+/- (pi(+/-)) decays. The event sample is selected from 2: 8 fb(-1) of p (p) over bar collisions recorded by D0 experiment in run II of the Fermilab Tevatron Collider. The charge asymmetry A(CP)(B+ -> J/psi K+) = +0: 0075 +/- 0: 0061(stat) +/- 0: 0030 (syst) is obtained using a sample of approximately 40 000 B-+/- -> J/psi K-+/- 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+ -> J/psi pi(+)) = - 0: 09 +/- 0: 08(stat) +/- 0: 03(syst).

Place, publisher, year, edition, pages
2008. Vol. 100, no 21, 211802- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-152620DOI: 10.1103/PhysRevLett.100.211802ISI: 000256585500014OAI: oai:DiVA.org:uu-152620DiVA: diva2:413604
Available from: 2011-04-29 Created: 2011-04-29 Last updated: 2017-12-11Bibliographically approved

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