[Unknown] et al.
S.J. de Jong
- Evidence for an anomalous like-sign dimuon charge asymmetry
- Physical Review D. Particles, Fields, Gravitation, and Cosmology
- Volume | Issue number
- 82 | 3
- Pages (from-to)
- Number of pages
- Document type
- Faculty of Science (FNWI)
- Institute for High Energy Physics (IHEF)
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.
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