Published in

Elsevier, Nuclear Physics B - Proceedings Supplements, (210-211), p. 141-146

DOI: 10.1016/j.nuclphysbps.2010.12.062

Proceedings of Flavor Physics and CP Violation 2010 — PoS(FPCP 2010)

DOI: 10.22323/1.116.0010

Proceedings of 35th International Conference of High Energy Physics — PoS(ICHEP 2010)

DOI: 10.22323/1.120.0243

Links

Tools

Export citation

Search in Google Scholar

Evidence for an anomalous like-sign dimuon charge asymmetry

Journal article published in 2010 by M. R. J.; Collaboration on behalf of D0; Williams, R. Stroehmer, Victor Mukhamedovich; /Dubna JINR;Abbott Braden Keim; /Oklahoma U.;Abolins Maris A.; /Michigan State U.;Acharya Bannanje Sripath; /Tata Inst.;Adams Mark Raymond; /Illinois U. Chicago;Adams Todd; /Florida U.;Aguilo Ernest; /York U. Canada;Alexeev Guen Abazov, Braden Keim Abbott, Maris A. Abolins, Bannanje Sripath Acharya, Mark Raymond Adams, Todd Adams, Ernest Aguilo, Guennadi D. Alexeev, Georgiy D. Alkhazov, Andrew K. Alton, A. Justed, George O. Alverson, S.-J. Park and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

Full text: Download

Green circle
Preprint: archiving allowed
Red circle
Postprint: archiving forbidden
Red circle
Published version: archiving forbidden
Data provided by SHERPA/RoMEO

Abstract

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) ; We measure the charge asymmetry $A≡(N^{++} - N^{--})/(N^{++} + N^{--})$ 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: $\aslb=-0.00957±0.00251\thinspace({\rm stat})±0.00146\thinspace({\rm sys})$. 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.