New physics reach of CP violating observables in the decay B to K* l+ l-

TL;DR

This paper evaluates the potential of CP violating observables in B to K* l+ l- decays for new physics searches, analyzing theoretical uncertainties and experimental sensitivities to improve indirect detection methods.

Contribution

It provides a detailed analysis of the new physics reach of CP violating observables in B decays, incorporating error analysis and experimental feasibility assessments.

Findings

CP violating observables can effectively probe new physics effects.

Theoretical uncertainties from form factors and scale dependences are critically assessed.

Experimental sensitivities at LHCb are evaluated using a full-angular fit method.

Abstract

We discuss theoretical and experimental preparations for an indirect new physics search using the rare decay B to K*0 (to K pi) l+ l- focusing on CP violating observables. The separation of new physics effects and hadronic uncertainties is the key issue when using flavour observables in a new-physics search. Our analysis is based on QCD factorization and soft-collinear effective theory and critically examines the new physics reach of those observables via a detailed error analysis due to scale dependences, form factors, and other input parameters; we also explore the experimental sensitivities at LHCb using a full-angular fit method; finally, we make the impact of the unknown Lambda/mb corrections manifest in our theoretical predictions.