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Title: Chiral corrections to the scalar form factor in B{sub q}{yields}D{sub q} transitions

Abstract

We consider chiral loop corrections to the scalar form factor in B{sub q}{yields}D{sub q}l{nu} decays. First we consider chiral corrections to the 1/m{sub Q} suppressed operators and then we propose a procedure for the extraction of the relevant form factor using lattice QCD results. In particular, the extraction of a B*{yields}D* matrix element on the lattice can be used to determine all the necessary 1/m{sub Q} suppressed contributions to the scalar form factor in B{yields}D transitions. In the case of (B{sub s}{yields}D{sub s})/(B{yields}D) decay rate ratios we speculate that effects of kinematics and chiral corrections tend to cancel for the scalar form factor contributions. In particular the 1/m{sub Q} suppression of chiral corrections is compensated by the potentially large SU(3) flavor symmetry breaking corrections. The calculated corrections are relevant for the precise determination of possible new physics effects in B{sub q}{yields}D{sub q}l{nu} decays.

Authors:
 [1];  [2];  [2]
  1. University of Oslo, Physics Department, P. O. Box 1048 Blindern, N-0316 Oslo 3 (Norway)
  2. J. Stefan Institute, Jamova 39, P. O. Box 3000, 1001 Ljubljana (Slovenia)
Publication Date:
OSTI Identifier:
21254277
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 78; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.78.074008; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B MESONS; CHIRALITY; CORRECTIONS; D MESONS; EXTRACTION; FLAVOR MODEL; FORM FACTORS; LATTICE FIELD THEORY; MATRIX ELEMENTS; PARTICLE DECAY; QUANTUM CHROMODYNAMICS; SU-3 GROUPS; SYMMETRY BREAKING

Citation Formats

Eeg, Jan O, Fajfer, Svjetlana, Department of Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Kamenik, Jernej F, and INFN, Laboratori Nazionali di Frascati, I-00044 Frascati. Chiral corrections to the scalar form factor in B{sub q}{yields}D{sub q} transitions. United States: N. p., 2008. Web. doi:10.1103/PHYSREVD.78.074008.
Eeg, Jan O, Fajfer, Svjetlana, Department of Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Kamenik, Jernej F, & INFN, Laboratori Nazionali di Frascati, I-00044 Frascati. Chiral corrections to the scalar form factor in B{sub q}{yields}D{sub q} transitions. United States. https://doi.org/10.1103/PHYSREVD.78.074008
Eeg, Jan O, Fajfer, Svjetlana, Department of Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Kamenik, Jernej F, and INFN, Laboratori Nazionali di Frascati, I-00044 Frascati. 2008. "Chiral corrections to the scalar form factor in B{sub q}{yields}D{sub q} transitions". United States. https://doi.org/10.1103/PHYSREVD.78.074008.
@article{osti_21254277,
title = {Chiral corrections to the scalar form factor in B{sub q}{yields}D{sub q} transitions},
author = {Eeg, Jan O and Fajfer, Svjetlana and Department of Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana and Kamenik, Jernej F and INFN, Laboratori Nazionali di Frascati, I-00044 Frascati},
abstractNote = {We consider chiral loop corrections to the scalar form factor in B{sub q}{yields}D{sub q}l{nu} decays. First we consider chiral corrections to the 1/m{sub Q} suppressed operators and then we propose a procedure for the extraction of the relevant form factor using lattice QCD results. In particular, the extraction of a B*{yields}D* matrix element on the lattice can be used to determine all the necessary 1/m{sub Q} suppressed contributions to the scalar form factor in B{yields}D transitions. In the case of (B{sub s}{yields}D{sub s})/(B{yields}D) decay rate ratios we speculate that effects of kinematics and chiral corrections tend to cancel for the scalar form factor contributions. In particular the 1/m{sub Q} suppression of chiral corrections is compensated by the potentially large SU(3) flavor symmetry breaking corrections. The calculated corrections are relevant for the precise determination of possible new physics effects in B{sub q}{yields}D{sub q}l{nu} decays.},
doi = {10.1103/PHYSREVD.78.074008},
url = {https://www.osti.gov/biblio/21254277}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 78,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 2008},
month = {Wed Oct 01 00:00:00 EDT 2008}
}