6533b7d4fe1ef96bd126291e
RESEARCH PRODUCT
Symmetries in the angular distribution of exclusive semileptonic B decays
Ulrik EgedeJoaquim MatiasMarc RamonW. ReeceTobias Hurthsubject
Quantum chromodynamicsPhysicsParticle physicsDistribution (number theory)hep-exmedia_common.quotation_subjectPhysics beyond the Standard ModelFOS: Physical sciencesObservablehep-phAsymmetryHigh Energy Physics - ExperimentTransverse planeHigh Energy Physics - PhenomenologyHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)FactorizationQuantum mechanicsHomogeneous spaceComputer Science::Programming LanguagesHigh Energy Physics::ExperimentParticle Physics - Phenomenologymedia_commondescription
We discuss a method to construct observables protected against QCD uncertainties based on the angular distribution of the exclusive Bd -> K(*0}(-> Kpi) 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 Lambda/mb corrections. A discussion of the new physics properties of two of the transverse asymmetries, AT^{(2)} and AT^{(5)}, is presented. A comparison between the transverse asymmetry AT^{(2)} and the forward-backward asymmetry shows that AT^{(2)} emerges as an improved version of it.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-12-21 |