Johan Bijnens
Professor, Deputy Head of Division
Sunset integrals at finite volume
Author
Summary, in English
Chiral Perturbation Theory is a useful tool to aid in performing the various extrapolations needed in lattice QCD calculations of physical quantities. These include extrapolations in quark mass, finite lattice spacing and finite size of the lattice. Especially the latter will becomemore important when the quark masses on the lattice become smaller. Here we develop the needed two-loop integrals at finite volume to do the calculations for masses and decay constants for all general mass cases. I will present results based on an expansion in Bessel functions as well as on a version using theta functions and compare their efficiency. Work is in progress to combine these results with two-loop ChPT calculations.
Department/s
- Theoretical Particle Physics - Has been reorganised
Publishing year
2013
Language
English
Publication/Series
Proceedings of Science
Volume
29
Document type
Journal article
Publisher
Sissa Medialab srl
Topic
- Subatomic Physics
Conference name
31st International Symposium on Lattice Field Theory, LATTICE 2013
Conference date
2013-07-29 - 2013-08-03
Conference place
Mainz, Germany
Status
Published
ISBN/ISSN/Other
- ISSN: 1824-8039