出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We discuss a method to construct observables protected against QCD uncertainties based on the angular distribution of the exclusive Bd →K∗0(→Kp )l+l− decay. We focus on the identification and the interpretation of all the symmetries of the distribution. They constitute a key ingredient to construct a set of so-called transverse observables. We work in the framework of QCD factorization at NLO supplemented by an estimate of power-suppressed L/mb corrections. A discussion of the new physics properties of two of the transverse asymmetries, A(2) T and A(5) T , is presented. A comparison between the transverse asymmetry A(2) T and the forward-backward asymmetry shows that A(2) T emerges as an improved version of it.
