Anomalous CP-violation in B(s)-(B)over-bar(s) mixing due to a light spin-one particle

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52870

Title:	Anomalous CP-violation in B(s)-(B)over-bar(s) mixing due to a light spin-one particle
Authors:	Oh,S;Tandean,J
Contributors:	物理學系
Keywords:	LIFETIME DIFFERENCE;LEADING LOGARITHMS;STANDARD MODEL;GAUGE BOSON;DECAYS;QCD
Date:	2011
Issue Date:	2012-06-11 10:47:49 (UTC+8)
Publisher:	國立中央大學
Abstract:	The recent measurement of the like-sign dimuon charge asymmetry in semileptonic b-hadron decays by the D0 Collaboration is about three sigmas away from the standard-model prediction, hinting at the presence of CP-violating new physics in the mixing of B(s) mesons. We consider the possibility that this anomalous result arises from the contribution of a light spin-1 particle. Taking into account various experimental constraints, we find that the effect of such a particle with mass below the b-quark mass can yield a prediction consistent with the anomalous DO measurement within its one-sigma range. (C) 2011 Elsevier B.V. All rights reserved.
Relation:	PHYSICS LETTERS B
Appears in Collections:	[Department of Physics] journal & Dissertation

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