Model-independent method for measuring the angular coefficients of B 0 → D ∗− τ + ν τ decays

Journal of High Energy Physics

Anton Poluektov¹  Malcolm John²  Donal Hill²  Wenqi Ke³ 

[1] Centre de Physique des Particules de Marseille, Aix-Marseille University;Department of Physics, University of Oxford;Département de Physique, Ećole Normale Supérieure;

关键词: B physics;    Flavor physics;    Tau Physics;    Beyond Standard Model;    Hadron- Hadron scattering (experiments);   

DOI  :  10.1007/JHEP11(2019)133

来源: DOAJ

【 摘 要 】

Abstract Reconstruction of the B 0 → D ∗− τ + ν τ angular distribution is complicated by the strongly biasing effect of losing the neutrino information from both the B and τ decays. In this work, a novel method for making unbiased measurements of the angular coefficients while preserving the model independence of the angular technique is demonstrated. The twelve angular functions that describe the signal decay, in addition to background terms, are modelled in a multidimensional fit, using template probability density functions that encapsulate all resolution and acceptance effects. Sensitivities at the LHCb and Belle II experiments are estimated, and sources of systematic uncertainty are discussed, notably in the extrapolation to a measurement of R(D ∗ ).

【 授权许可】

Unknown