| Texto completo | |
| Autor(es): |
Ahmed, Ishtiaq
;
Aslam, M. Jamil
;
Paracha, M. Ali
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Review D; v. 89, n. 1, p. 16-pg., 2014-01-16. |
| Resumo | |
The effects of the new neutral Z' boson in B-s -> phi l(+)l(-), when phi is longitudinal or transverse polarized, are studied. In addition, the implications of the Z' boson on the unpolarized and polarized CP violation asymmetries, with reference to leptons, are also presented. It is observed that the branching ratio with polarized phi is quite sensitive to the Z' contributions which are coming through the modification of the Wilson coefficients C-9(eff) and C-10. Moreover, the off-diagonal elements of the chiral Z' couplings contain a new weak phase phi(sb) that provides a new source of CP violation. Keeping in view that in the flavor-changing neutral-current transitions, the CP-violation asymmetries are highly suppressed in the Standard Model, we have studied the unpolarized and polarized CP-violation asymmetries in B-s -> phi l(+)l(-) decays. Our results indicate that these CP-violation asymmetries are remarkably significant and can give us hints of any new physics coming through the Z' boson. It is hoped that accurate measurements of these asymmetries will not only help us to establish NP but also give us a chance to determine the precise values of the coupling parameters of the Z' boson. (AU) | |
| Processo FAPESP: | 12/13047-2 - Física além do modelo padrão e aspectos não perturbativos em decaimentos semi-leptônicos raros de mésons b |
| Beneficiário: | Muhammad Ali Paracha |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |