2014/12/09 by Girish Kumar, Namit Mahajan
Physics and Astronomy · #Artificial intelligence #Black Holes and Theoretical Physics #Computer science #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.93.054041
published as Phys. Rev. D 93, 054041 (2016) · 7 pages, 1 pdf figure
arxiv created 2014/12/09 · openalex publication_date 2016/03/28 · arxiv updated 2016/04/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We calculate the zeros of angular observables P4^\ensuremath' and P5^\ensuremath' of the angular distribution of 4-body decay B\ensuremath→K*(\ensuremath→K\ensuremathπ)l+l^\ensuremath- where LHCb, in its analysis of form-factor independent angular observables, has found deviations from the standard model predictions. In the large recoil region, we obtain relations between the zeros of P4^\ensuremath', P5^\ensuremath' and the zero (\stackrel^s0) of forward-backward asymmetry of lepton pair, AFB. These relations are independent of hadronic uncertainties and depend only on the Wilson coefficients. We also construct a new observable, OTL,R, whose zero in the standard model coincides with \stackrel^s0, but in the presence of new physics contributions will show different behavior. Moreover, the profile of the new observable, even within the standard model, is very different from AFB. We point out that precise measurements of these zeros in the near future would provide a crucial test of the standard model and would be useful in distinguishing between different possible new physics contributions to the Wilson coefficients.