Comparing different ansatzes to describe electroweak radiative corrections to exclusive semileptonic B meson decays into (pseudo)scalar final state mesons using Monte-Carlo techniques
arXiv:1010.5997
Abstract
In this publication electroweak next-to-leading order corrections to semileptonic B-meson decays into (pseudo)scalar final states are presented. To this end, these corrections of O(alpha G_F) have been calculated in the QED-enhanced phenomenological model, incorporating the bound-state mesons as its degrees of freedom, and matched to a similar calculation on the level of constituent partons in the full Standard Model. Consequently, the effects arising due to corrections of the partial decay widths on the extraction of the CKM matrix elements |V_cb| and |V_ub| are detailed. Further, the results of two independent Monte-Carlo implementations are presented: One is the dedicated, strict fixed-order generator BLOR, and the other is embedded into the generic Yennie-Frautschi-Suura-type resummation of Photons++, which is part of the multi-purpose event generator Sherpa. The resulting distributions are compared against the standard tool used in many experimental analyses, PHOTOS, showing improvements on the shapes of kinematic distributions of both the lepton and the final state meson.
36 pages, 33 figures
References in corpus (15)
- Event generation with SHERPA 1.1
- Rivet user manual
- A General Approach To Photon Radiation Off Fermions
- Radiative Semileptonic Kaon Decays
- Soft Photon Radiation in Particle Decays in SHERPA
- Semileptonic B decays to excited charmed mesons
- The UTfit Collaboration Report on the Status of the Unitarity Triangle beyond the Standard Model I. Model-independent Analysis and Minimal Flavour Violation
- Measurement of |V_cb| and the Form-Factor Slope in Bbar -> D l- nubar Decays in Events Tagged by a Fully Reconstructed B Meson
- New, high statistics measurement of the K+ -> pi0 e+ nu (Ke3) branching ratio
- Measurements of the Semileptonic Decays $\Bb\to D\ell\nub$ and $\Bb\to D^*\ell\nub$ Using a Global Fit to $D X\ell\nub$ Final States
- Radiative corrections in weak semi-leptoni processes at low energy: a two-step matching determination
- D*-->Dpi and D*-->Dgamma decays: Axial coupling and Magnetic moment of D* meson
- Factorization in exclusive semileptonic radiative B decays
- Soft photons in semileptonic B \to D decays
- A phenomenological model for radiative corrections in exclusive semileptonic B-meson decays to (pseudo)scalar final state mesons