TY  - JOUR
AU  - Li, X. Q.
AU  - Li, Y. M.
AU  - Lu, G. R.
AU  - Su, F.
PY  - 2012
DA  - 2012//
TI  - B-s(0)-(B)over-bar(s)(0) mixing in a family non-universal Z ' model revisited
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 049
EP  - 27pp
VL  - 05
IS  - 5
PB  - Springer
KW  - Beyond Standard Model
KW  - B-Physics
KW  - CP violation
AB  - Motivated by the very recent measurements performed at the LHCb and the Tevatron of the B-s(0) – (B) over bar (0)(s) mixing, in this paper we revisit it in a family non-universal Z' model, to check if a simultaneous explanation for all the mixing observables, especially for the like-sign dimuon charge asymmetry observed by the D0 collaboration, could be made in such a specific model. In the first scenario where the Z' boson contributes only to the off-diagonal element M-12(s), it is found that, once the combined constraints from Delta M-s, phi(s) and Delta Gamma(s) are imposed, the model could not explain the measured flavour-specific CP asymmetry a(fs)(s), at least within its 1 sigma ranges. In the second scenario where the NP contributes also to the absorptive part Gamma(s)(12) via tree-level Z'-induced b -> c (c) over bars operators, we find that, with the constraints from Delta M-s, phi(s) and the indirect CP asymmetry in (B) over bar (d) -> J/psi K-S taken into account, the present measured 1 sigma experimental ranges for a(fs)(s) could not be reproduced too. Thus, such a specific Z' model with our specific assumptions could not simultaneously reconcile all the present data on B-s(0) – B-s(0) mixing. Future improved measurements from the LHCb and the proposed superB experiments, especially of the flavour-specific CP asymmetries, are expected to shed light on the issue.
SN  - 1126-6708
UR  - http://arxiv.org/abs/1204.5250
UR  - https://doi.org/10.1007/JHEP05(2012)049
DO  - 10.1007/JHEP05(2012)049
LA  - English
N1  - WOS:000305236000049
ID  - Li_etal2012
ER  -