Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb${^-1}$ of $p\bar{p}$ collisions - INSPIRE

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Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb ${^-1}$ of $p\bar{p}$ collisions

D0

Collaboration

Jun, 2011

24 pages

Published in:

Phys.Rev.D 84 (2011) 052007

e-Print:

1106.6308 [hep-ex]

DOI:

10.1103/PhysRevD.84.052007

PDG: Re(

\epsilon _{{{\mathit B}^{0}}})/(1+\vert \epsilon _{{{\mathit B}^{0}}}\vert {}^{2}

Report number:

FERMILAB-PUB-11-307-E

Experiments:

FNAL-E-0823

View in:

reference search225 citations

Citations per year

Abstract: (arXiv)

We present an updated measurement of the anomalous like-sign dimuon charge asymmetry Aslb for semi-leptonic

b

-hadron decays in 9.0 fb^-1 of p pbar collisions recorded with the D0 detector at a center-of-mass energy of sqrt{s} = 1.96 TeV at the Fermilab Tevatron collider. We obtain Aslb = (-0.787 +- 0.172(stat) +- 0.093 (syst))%. This result differs by 3.9 standard deviations from the prediction of the standard model and provides evidence for anomalously large CP violation in semi-leptonic neutral B decay. The dependence of the asymmetry on the muon impact parameter is consistent with the hypothesis that it originates from semi-leptonic b-hadron decays.

Note:

Submitted to Phys. Rev. D

11.30.Er
14.40.Nd
13.25.Hw
charge: asymmetry: measured
muon: final state
bottom particle: semileptonic decay
CP: violation
impact parameter: dependence
Batavia TEVATRON Coll
DZERO

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