47th SLAC Summer Institute (SSI 2019)

Long-distance effects in inclusive B¯→Xdℓ+ℓ− decay

Not scheduled

20m

51/1-102 - Kavli Auditorium (SLAC)

Speaker

Jack Jenkins (Indiana University)

Description

Quark decays mediated by neutral currents are forbidden at tree level in the SM and are therefore sensitive to BSM corrections via indirect effects. The manifestation of these currents in inclusive decays such as $\overline{B}\to X_{s(d)}{\ell }^{+}{\ell }^{-}$ is particularly amenable to theoretical analysis, as integrated decay rates can be computed in an Operator Product Expansion. Local power corrections, resolved (nonlocal) power corrections and $q\overline{q}$ resonances are nonperturbative effects that play an important role in the phenomenology of neutral semileptonic inclusive $B$-decays. We include these effects in predictions for the branching ratio, forward-backward asymmetry and CP asymmetry of the rare decay $\overline{B}\to X_d{\ell }^{+}{\ell }^{-}.$