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
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
摘要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.
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.
CHANG Qin1,2**, HAN Lin1, YANG Ya-Dong1,3. Effects of Anomalous Tensor Couplings in Bs0−Bs0 Mixing[J]. 中国物理快报, 2012, 29(3): 31302-031302.
CHANG Qin, HAN Lin, YANG Ya-Dong. Effects of Anomalous Tensor Couplings in Bs0−Bs0 Mixing. Chin. Phys. Lett., 2012, 29(3): 31302-031302.
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