Effects of Anomalous Tensor Couplings in B0s — B¯0s Mixing
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 phisJ/ψ(phi,f0), assl 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 B0s — B¯0s mixing. Numerically, the observable assl 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 phiT1 = 41° +/- 35° or phiT8 = -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 phisJ/ψ(phi,f0), our theoretical result of assl is still much smaller than the central value of the experimental data.
- Publication:
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Chinese Physics Letters
- Pub Date:
- March 2012
- DOI:
- 10.1088/0256-307X/29/3/031302
- arXiv:
- arXiv:1108.0761
- Bibcode:
- 2012ChPhL..29c1302C
- Keywords:
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- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- 14pages, 2 figures, 3tables