B⁰ˢ->JψΦ with LHC-ATLAS : simulations and sensitivity studies

The decay B⁰ˢ->Jψφ is often referred to as a "golden decay mode" on account of its potential for measuring the weak mixing parameters ΔΓˢ and Φwith little theoretical uncertainty. Being a self-conjugate process, an angular analysis is required to separate out the different contributions to the overall decay amplitude. This work describes a series of simulations of these measurements in the LHC-ATLAS detector, leading to an assessment of the precision which could be obtained after various integrated luminosities.