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

Journal Article · Sat Apr 01 00:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.73.074509· OSTI ID:20782828

Bijnens, Johan ^[1]; Danielsson, Niclas ^[1]; Laehde, Timo A ^[2]

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1. Department of Theoretical Physics, Lund University, Soelvegatan 14A, SE-223 62 Lund (Sweden)
2. Helmholtz-Institut fuer Strahlen-und Kernphysik (HISKP), Bonn University, Nussallee 14-16, D-53115 Bonn (Germany)

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 Explicit analytical results are given for up to three nondegenerate sea-quark flavors, along with the previously unpublished expression for the pseudoscalar meson decay constant for three nondegenerate sea-quark flavors.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.

• OSTI ID: 20782828
• Journal Information: Physical Review. D, Particles Fields, Vol. 73, Issue 7; Other Information: DOI: 10.1103/PhysRevD.73.074509; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
CHIRALITY
CORRECTIONS
FLAVOR MODEL
LATTICE FIELD THEORY
NUMERICAL ANALYSIS
PARTICLE DECAY
PERTURBATION THEORY
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUARKS
REST MASS
SUPERSYMMETRY