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Photo of Johan Bijnens

Johan Bijnens

Professor

Photo of Johan Bijnens

Three-flavor partially quenched chiral perturbation theory at NNLO for meson masses and decay constants

Author

  • Johan Bijnens
  • Niclas Danielsson
  • Timo Lähde

Summary, in English

We discuss partially quenched chiral perturbation theory (PQ chi PT) and possible fitting strategies to lattice QCD data at next-to-next-to-leading order (NNLO) in the mesonic sector. We also present a complete calculation of the masses of the charged pseudoscalar mesons, in the supersymmetric formulation of PQ chi PT. Explicit analytical results are given for up to three nondegenerate sea-quark flavors, along with the previously unpublished expression for the pseudoscalar meson decay constant for three nondegenerate sea-quark flavors. The numerical analysis in this paper demonstrates that the corrections at NNLO are sizable, as expected from earlier work.

Department/s

  • Theoretical Particle Physics
  • Mathematical Physics

Publishing year

2006

Language

English

Publication/Series

Physical Review D (Particles, Fields, Gravitation and Cosmology)

Volume

73

Issue

7: 074509

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics
  • Physical Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 1550-2368