| Thème(s) : |
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Physique/Physique des Hautes Energies - Expérience
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| Titre : |
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Measurement of the semileptonic charge asymmetry in B0 meson mixing with the D0 detector |
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| Auteur : |
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V.M. Abazov, M.-C. Cousinou1, A. Duperrin1, W. Geng1, E. Kajfasz1, S. Kermiche1, E. Nagy1, N. Osman1, G. Grenier2, T. Kurca2, P. Lebrun2, P. Verdier2, F. Badaud3, P. Gay3, Ph. Gris3, J.-F. Grivaz4, T. Guillemin4, M. Jaffré4, P. Pétroff4, H. Li5, G. Sajot5, J. Stark5 |
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| Laboratoire : |
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| Résumé : |
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We present a measurement of the semileptonic mixing asymmetry for B0 mesons, a^d_{sl}, using two independent decay channels: B0 -> mu+D-X, with D- -> K+pi-pi-; and B0 -> mu+D*-X, with D*- -> antiD0 pi-, antiD0 -> K+pi- (and charge conjugate processes). We use a data sample corresponding to 10.4 fb^{-1} of ppbar collisions at sqrt(s) = 1.96 TeV, collected with the D0 experiment at the Fermilab Tevatron collider. We extract the charge asymmetries in these two channels as a function of the visible proper decay length (VPDL) of the B0 meson, correct for detector-related asymmetries using data-driven methods, and account for dilution from charge-symmetric processes using Monte Carlosimulation. The final measurement combines four signal VPDL regions for eachchannel, yielding a^d_{sl} = [0.68 \pm 0.45 \text{(stat.)} \pm 0.14\text{(syst.)}]%. This is the single most precise measurement of thisparameter, with uncertainties smaller than the current world average of Bfactory measurements |
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| Collaboration/Projet : |
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D0 |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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Date de publication
ou d'écriture : |
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2012 |
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| Nom du périodique : |
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| Physical Review D (Phys. Rev. D) |
| Publisher |
American Physical Society |
| ISSN |
1550-7998 (eISSN : 1550-2368) |
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| Volume : |
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86 |
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| Page/Article : |
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072009 |
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| Identifiant local : |
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FERMILAB-PUB-12-488-E , LPSC12252 |
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| Classification PACS : |
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PACS numbers: 11.30.Er, 12.15.Ff, 14.40.Nd |
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| Commentaire : |
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Submitted to Phys. Rev. D, See paper for full authors list |
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