Evidence for an anomalous like-sign dimuon charge asymmetry
| Authors |
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| Publication date | 2010 |
| Journal | Physical Review D. Particles, Fields, Gravitation, and Cosmology |
| Volume | Issue number | 82 | 3 |
| Pages (from-to) | 032001 |
| Number of pages | 30 |
| Organisations |
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| Abstract | We measure the charge asymmetry A of like-sign dimuon events in 6.1 fb-1 of pp̅ collisions recorded with the D0 detector at a center-of-mass energy √s=1.96 TeV at the Fermilab Tevatron collider. From A, we extract the like-sign dimuon charge asymmetry in semileptonic b-hadron decays: Aslb=-0.00957±0.00251 (stat)±0.00146 (syst). This result differs by 3.2 standard deviations from the standard model prediction Aslb(SM)=(-2.3-0.6+0.5)×10-4 and provides first evidence of anomalous CP violation in the mixing of neutral B mesons. |
| Document type | Article |
| Language | English |
| Published at |
https://doi.org/10.1103/PhysRevD.82.032001
(Final published version)
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