6533b7dcfe1ef96bd1271f78

RESEARCH PRODUCT

Taming the higher power corrections in semileptonic B decays

Sascha TurczykPaolo GambinoKristopher J. Healey

subject

PhysicsQuarkSemileptonic decayNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyFOS: Physical sciencesState (functional analysis)01 natural sciencesSpectral linelcsh:QC1-999High Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)High Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Dimension (vector space)Quantum electrodynamics0103 physical sciencesSaturation (graph theory)High Energy Physics::Experiment010306 general physicslcsh:Physics

description

We study the effect of dimension 7 and 8 operators on inclusive semileptonic B decays and the extraction of |Vcb|. Using moments of semileptonic B decay spectra and information based on the Lowest-Lying State saturation Approximation (LLSA) we perform a global fit of the nonperturbative parameters of the heavy quark expansion including for the first time the O(1/mb^{4,5}) contributions. Higher power corrections appear to have a very small effect on the extraction of |Vcb|, independently of the weight we attribute to the LLSA.

yearjournalcountryeditionlanguage
2016-12-01
10.1016/j.physletb.2016.10.023http://hdl.handle.net/2318/1607415