Johan Bijnens
Professor, Deputy Head of Division
Vector Formfactors in Hard Pion Chiral Perturbation Theory.
Author
Summary, in English
We use three-flavour hard pion Chiral Perturbation Theory (HPChPT) in both the heavy meson and a relativistic formulation to calculate the chiral logarithms m(2) log (m(2)/mu(2)) contributing to the formfactors of the B-(s) -> pi, K, eta and D-(s) -> pi, K, eta transitions at momentum transfer q(2) away from the endpoint q(max)(2) = (m(B) - m(M))(2). We compare our results with CLEO D -> pi and D -> K data. We also calculate the Isgur-Wise function of the B-(s) -> D-(s) semileptonic decay away from the endpoint and the chiral logarithms for the pion and kaon electromagnetic formfactor. In two-flavour HPChPT we calculate the chiral logarithms for the pion vector and the scalar formfactors at s >> m(pi)(2). This allows us to test hard pion ChPT using the existing two-loop calculations for these quantities. (C) 2011 Elsevier B.V. All rights reserved.
Department/s
- Theoretical Particle Physics - Has been reorganised
Publishing year
2011
Language
English
Pages
145-166
Publication/Series
Nuclear Physics, Section B
Volume
846
Issue
2
Links
Document type
Journal article
Publisher
North-Holland
Topic
- Subatomic Physics
Keywords
- Chiral Perturbation Theory
- B and D meson semileptonic decays
Status
Published
ISBN/ISSN/Other
- ISSN: 0550-3213