# Impact of leptonic τ decays on the distribution of B→Pμν¯ decays

Bordone, Marzia (Physik Institut, University of Zürich, Winterthurerstrasse 190, 8057, Zurich, Switzerland) ; Isidori, Gino (Physik Institut, University of Zürich, Winterthurerstrasse 190, 8057, Zurich, Switzerland) ; Dyk, Danny van (Physik Institut, University of Zürich, Winterthurerstrasse 190, 8057, Zurich, Switzerland)

30 June 2016

Abstract: We calculate the fully-differential rate of the decays B→Pτ(→μν¯ν)ν¯ where P=D,π , background to the semimuonic decays B→Pμν¯ . The decays with a 3ν final state can have a sizable impact on the experimental analyses of the ratios RD and Rπ , depending on the event selection in the analysis. We outline a strategy which permits the extraction of RPB(τ→μν¯ν) from the neutrino-inclusive rate. Our analytic results can also be used to test both existing and upcoming experimental analyses. We further provide Monte Carlo samples of the 5D rate of the neutrino-inclusive decays B→PμXν¯ .

Published in: EPJC 76 (2016) 360