| THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
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Effects of Anomalous Tensor Couplings in Bs0−Bs0 Mixing |
| CHANG Qin1,2**, HAN Lin1, YANG Ya-Dong1,3 |
1Institute of Particle Physics, Huazhong Normal University, Wuhan 430079
2Department of Physics, Henan Normal University, Xinxiang, Henan 453007
3Key Laboratory of Quark & Lepton Physics (Ministry of Education), Huazhong Normal University, Wuhan 430079
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| Cite this article: |
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YANG Ya-Dong, HAN Lin, CHANG Qin 2012 Chin. Phys. Lett. 29 031302 |
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Abstract Motivated by the recently observed anomalous large dimuon charge asymmetry in neutral B decays, we study the effects of the anomalous tensor couplings to pursue a possible solution. With the constraints from the observables φsJ/ψ(φ,f0), asls and ΔMs, the new physics parameter spaces are severely restricted. We find that the contributions induced by the color−singlet or the color-octet tensor operators are helpful to moderate the anomaly in Bs0-Bs0 mixing. Numerically, the observable asls could be enhanced by about two orders of magnitude by the contributions of color−singlet or color-octet tensor operators with their respective nontrivial new weak phase φT1=41°±35° or φT8=−47°±33° and relevant strength parameters |gT1|=(2.89±1.40)×10−2 or |gT8|=(0.79±0.34)×10−2. However, due to the fact that the NP contributions are severely suppressed by the recent LHCb measurement for φsJ/ψ(φ,f0), our theoretical result of asls is still much smaller than the central value of the experimental data.
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| Keywords:
13.25.Hw
12.60.Cn
12.15.Mm.
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Received: 08 December 2011
Published: 11 March 2012
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