Study of some B < inf > s < /inf > →f < inf > 0 < /inf > (980) decays in the fourth generation model

Abstract

We study some non leptonic and semileptonic decays of the Bs meson into a final scalar meson f0(980) in the fourth quark generation model. Since the f0(980) meson is dominantly composed of the (ss̄) pair, the mixing-induced CP asymmetry in the decay mode B s→J/ψf0(980) would a priori give sin2βs, where βs is the Bs-B ̄s mixing phase. In the standard model this asymmetry is expected to be vanishingly small. We find that in the fourth generation model a large mixing-induced CP asymmetry could be possible for this process. Similarly the branching ratios of the rare semileptonic decays Bs→f 0(980)l+l- and Bs→f 0(980)νν̄ are found to be enhanced significantly from their corresponding standard model values. © 2011 American Physical Society.