Measuring beta_s with Bs -> K0(*) K0bar(*) -- a Reappraisal

Bhubanjyoti Bhattacharya, Alakabha Datta, Maxime Imbeault +1

The Bs-Bsbar mixing phase, beta_s, can be extracted from Bs -> K0(*) K0bar(*), but there is a theoretical error if the second amplitude, Vub* Vus P'uc, is non-negligible. Ciuchini,…