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## Evidence for an anomalous like-sign dimuon charge asymmetry

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In: Physical review letters, Vol. 105, No. 8, 081801, 16.08.2010.

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### Bibtex

@article{ce833f87342a420a94fd8a0608ff75bc,
title = "Evidence for an anomalous like-sign dimuon charge asymmetry",
abstract = "We measure the charge asymmetry $A\equiv(N^{++} - N^{--})/(N^{++} + N^{--})$ of like-sign dimuon events in 6.1~fb$^{-1}$ of $p\bar{p}$ collisions recorded with the D0 detector at a center-of-mass energy $\sqrt{s}=1.96$~TeV at the Fermilab Tevatron collider. From $A$ we extract the like-sign dimuon charge asymmetry in semileptonic $b$-hadron decays: $\aslb=-0.00957\pm0.00251\thinspace({\rm stat})\pm0.00146\thinspace({\rm sys})$. It differs by 3.2~standard deviations from the standard model prediction $\aslb({\rm SM})=(-2.3^{+0.5}_{-0.6})\times10^{-4}$, and provides first evidence of anomalous $CP$ violation in the mixing of neutral $B$ mesons.",
author = "D0 Collaboration and Iain Bertram and Guennadi Borissov and Harald Fox and Mark Williams and Peter Ratoff and Peter Love",
note = "{\textcopyright} 2010 The American Physical Society 7 pages, 3 figures, submitted to Phys. Rev. Lett., please refer this paper together with arXiv:1005.2757 [hep-ex] (2010) (submitted to Phys. Rev. D)",
year = "2010",
month = aug,
day = "16",
doi = "10.1103/PhysRevLett.105.081801",
language = "English",
volume = "105",
journal = "Physical review letters",
issn = "1079-7114",
publisher = "American Physical Society",
number = "8",

}

### RIS

TY - JOUR

T1 - Evidence for an anomalous like-sign dimuon charge asymmetry

AU - Collaboration, D0

AU - Bertram, Iain

AU - Fox, Harald

AU - Williams, Mark

AU - Ratoff, Peter

AU - Love, Peter

N1 - © 2010 The American Physical Society 7 pages, 3 figures, submitted to Phys. Rev. Lett., please refer this paper together with arXiv:1005.2757 [hep-ex] (2010) (submitted to Phys. Rev. D)

PY - 2010/8/16

Y1 - 2010/8/16

N2 - We measure the charge asymmetry $A\equiv(N^{++} - N^{--})/(N^{++} + N^{--})$ of like-sign dimuon events in 6.1~fb$^{-1}$ of $p\bar{p}$ collisions recorded with the D0 detector at a center-of-mass energy $\sqrt{s}=1.96$~TeV at the Fermilab Tevatron collider. From $A$ we extract the like-sign dimuon charge asymmetry in semileptonic $b$-hadron decays: $\aslb=-0.00957\pm0.00251\thinspace({\rm stat})\pm0.00146\thinspace({\rm sys})$. It differs by 3.2~standard deviations from the standard model prediction $\aslb({\rm SM})=(-2.3^{+0.5}_{-0.6})\times10^{-4}$, and provides first evidence of anomalous $CP$ violation in the mixing of neutral $B$ mesons.

AB - We measure the charge asymmetry $A\equiv(N^{++} - N^{--})/(N^{++} + N^{--})$ of like-sign dimuon events in 6.1~fb$^{-1}$ of $p\bar{p}$ collisions recorded with the D0 detector at a center-of-mass energy $\sqrt{s}=1.96$~TeV at the Fermilab Tevatron collider. From $A$ we extract the like-sign dimuon charge asymmetry in semileptonic $b$-hadron decays: $\aslb=-0.00957\pm0.00251\thinspace({\rm stat})\pm0.00146\thinspace({\rm sys})$. It differs by 3.2~standard deviations from the standard model prediction $\aslb({\rm SM})=(-2.3^{+0.5}_{-0.6})\times10^{-4}$, and provides first evidence of anomalous $CP$ violation in the mixing of neutral $B$ mesons.

UR - http://www.scopus.com/inward/record.url?scp=77955705234&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.105.081801

DO - 10.1103/PhysRevLett.105.081801

M3 - Journal article

VL - 105

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 8

M1 - 081801

ER -