EP Seminar

Evidence for an anomalous like-sign dimuon charge asymmetry

Name: Evidence for an anomalous like-sign dimuon charge asymmetry
Start: 2010-06-14T11:00:00+02:00
End: 2010-06-14T12:00:00+02:00
Location: CERN

by Bruce Hoeneisen (University San Francisco of Quito)

Monday 14 Jun 2010, 11:00 → 12:00 Europe/Zurich

503/1-001 - Council Chamber (CERN)

503/1-001 - Council Chamber

CERN

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Description

We measure the charge asymmetry A of like-sign dimuon events in 6.1 fb^-1 of pp 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: A^b_sl = -0.00957 ± 0.00251 (stat) ± 0.00146 (syst). This result differs by 3.2 standard deviations from the standard model prediction A^b_sl(SM) = (-2.3^+0.5 _-0.6) x 10^-4 and provides first evidence of anomalous CP-violation in the mixing of neutral B mesons.

Organised by

Maria SPIROPULU/Guillaume UNAL/PH-EP............** Tea and Coffee will be served at 10:30