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| Authors | V.M. Abazov, . et al, S.J. de Jong, M. Demarteau, P. Houben, P.J. van den Berg | | Title | Study of direct CP violation in B-+/- -> J/psi K-+/-(pi(+/-)) decays |
| Journal | Physical Review Letters |
| Volume | 100 |
| Year | 2008 |
| Issue | 21 |
| Pages | 211802- |
| ISSN | 00319007 |
| Faculty | Faculty of Science |
| Institute/dept. | FNWI: Institute for High Energy Physics (IHEF) |
| Abstract | 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). |
| Document type | Article |
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