CP Violation in Fourth Generation Quark Decays

by Prof. George Hou (National Taiwan University, Taipei)

Thursday 22 Apr 2010, 16:00 → 17:15 Europe/Brussels

E/3rd floor-E.349 - Seminar room (E.349) (Marc de Hemptinne (chemin du Cyclotron, 2, Louvain-la-Neuve))

We show that, if a fourth generation is discovered at the Tevatron or LHC, one could study CP violation (CPV) in b' -> s decays. Asymmetries could reach 30% for b' -> sZ for mb' < 350 GeV, while it could be greater than 50% for b' -> s gamma, and extend to higher mb'. Branching ratios are 10-3 to 10-5, and CPV measurement requires tagging. Once measured, however, the CPV phase can be extracted with little theoretical uncertainty.