Speaker
Ms
Xuesong Liu
(Tsinghua University)
Description
Decays of the Bs meson via b ->c cbar s transitions such as Bs0 -> J/psi K K and Bs0 -> J/psi pi pi are sensitive to the CP-violating phase phi_s, which is known with a good precision from global fits based on the Standard Model. Physics beyond the Standard model can affect the Bs0-Bs0bar oscillations or contribute to second-order processes, introducing a sizable shift in phi_s and providing evidence for new dynamics. In addition, the Bs0 decay width and the decay width difference between the Bs0 mass eigenstates can be measured precisely in b -> c cbar s transitions. We present the first Run 2 measurements of these quantities at LHCb.
Primary author
Ms
Xuesong Liu
(Tsinghua University)
