Evidence for an anomalous like-sign dimuon charge asymmetry

Open Access
Authors
  • V.M. Abazov
  • [Unknown] et al.
  • L.S. Ancu
  • S.J. de Jong
  • F. Filthaut
  • P. Houben
  • M.M. Meijer
  • P. Svoisky
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
  • Faculty of Science (FNWI) - Institute of Physics (IoP) - Institute for High Energy Physics (IHEF)
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)
Downloads
333311.pdf (Final published version)
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