Threshold Resummation in Semi-Inclusive B decays
Giancarlo Ferrera, (Barcelona U., ECM, Granada U.)
TL;DR
This paper develops a model for NNLL resummed form factors in B decays using analytic QCD coupling, accurately matching experimental data and extending to massive quark jets.
Contribution
It introduces a novel NNLL resummation model based on analytic QCD coupling for B decays, improving the treatment of non-perturbative effects.
Findings
Model accurately reproduces experimental data
Extends threshold resummation to massive quark jets
Provides an improved formula for semileptonic charmed decays
Abstract
We discuss threshold resummation in radiative and charmless semileptonic B decays. To deal with the large non perturbative effects, we introduce a model for NNLL resummed form factors based on the analytic QCD coupling. By means of this model we can reproduce with good accuracy the experimental data. Finally we briefly present an improved threshold resummed formula to deal with jets initiated by massive quarks as in the case of semileptonic charmed decays.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research