Anatomy of B-s,d(0) -> J/psi f(0)(980)

作者：Fleischer Robert^*; Knegjens Robert; Ricciardi Giulia

来源：European Physical Journal C, 2011, 71(12): 1832.

DOI：10.1140/epjc/s10052-011-1832-x

The B-s(0) -> J/psi f(0)(980) decay offers an interesting experimental alternative to the well-known B-s(0) -> J/psi phi channel for the search of CP-violating New-Physics contributions to B-s(0) - (B) over bar (0)(s) mixing. As the hadronic structure of the f(0)(980) has not yet been settled, we take a critical look at the implications for the relevant observables and address recent experimental data. It turns out that the effective lifetime of B-s(0) -> J/psi f(0)(980) and its mixing-induced CP asymmetry S are quite robust with respect to hadronic effects and thereby allow us to search for a large CP-violating B-s(0) - (B) over bar (0)(s) mixing phase phi(s), which is tiny in the Standard Model. However, should small CP violation, i.e. in the range -0.1 less than or similar to S less than or similar to 0, be found in B-s(0) -> J/psi f(0)(980), it will be crucial to constrain hadronic corrections in order to distinguish possible New-Physics effects from the Standard Model. We point out that B-d(0) -> J/psi f(0)(980), which has not yet been measured, is a key channel in this respect and discuss the physics potential of this decay.

• 出版日期2011-12