Effects of Anomalous Tensor Couplings in B_(s)^(0)-(B-)_(s)^(0) Mixing

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 observablesφ_(s)^(J/(φ)(φ,f0),a_(sl)^(s)andΔM_(s),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 BOs-(B-)Osmixing.Numerically,the observable aSsl could be enhanced by about two orders of magnitude by the contributionsof color-singlet or color-octet tensor operators with their respective nontrivial new weak phaseφT_(1)=41°±35°orφs=-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 forφJ/φ(φ,f0)s,our theoretical result of aSsl is still much smaller than the central value of the experimental data.