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T: Fachverband Teilchenphysik

T 104: Flavor VIII

T 104.1: Talk

Thursday, March 23, 2023, 15:50–16:05, HSZ/0304

b->c decays at NNLO — •Manuel Egner¹, Matteo Fael², Kay Schoenwald³, and Matthias Steinhauser¹ — ¹Karlsruhe Institute of Technology, TTP — ²CERN, Department of Theoretical Physics — ³University of Zurich, Physik-Institut

The decay of B mesons can be described in the heavy quark expansion as the decay of a free bottom quark plus corrections which are suppressed by powers of 1/m_b. In this talk I will present our NNLO calculations to the decay of free bottom quarks b->c with full charm mass dependence. For the semileptonic decay channel b->clv, we obtain analytic results which can be compared to previous known results obtained via expansions in the mass ratio m_c/m_b. I will also give an outlook on the ongoing calculation of the hadronic decay channels b->cud and b->ccs, where similar calculation techniques as in the semileptonic case are used.