f{sub 0}(600),{kappa}(800), {rho}(770) and K*(892), quark mass dependence from unitarized SU(3) Chiral Perturbation Theory

Journal Article · Thu Aug 05 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3483380· OSTI ID:21426443

Nebreda, J; Pelaez, J R ^[1]

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1. Dept. Fisica Teorica II, Universidad Complutense, 28040, Madrid (Spain)

We study the strange and non-strange quark mass dependence of the parameters of the f{sub 0}(600),{kappa}(800), {rho}(770) and K*(892) resonances generated from elastic meson-meson scattering using unitarized one-loop Chiral Perturbation Theory. We fit simultaneously all experimental scattering data up to 0.8-1 GeV together with lattice results on decay constants and scattering lengths up to a pion mass of 440 MeV. Then, the strange and non-strange quark masses are varied from the chiral limit up to values of interest for lattice studies. In these amplitudes, the mass and width of the {rho}(770) and K*(892) present a similar and smooth quark mass dependence. In contrast, both scalars present a similar non-analyticity at high quark masses. Nevertheless the f{sub 0}(600) dependence on both quark masses is stronger than for the {kappa}(800) and the vectors. We also confirm the lattice assumption of quark mass independence of the vector two-meson coupling that, in contrast, is violated for scalars.

• OSTI ID: 21426443
• Journal Information: AIP Conference Proceedings, Vol. 1257, Issue 1; Conference: HADRON 2009: 13. international conference on hadron spectroscopy, Tallahassee, FL (United States), 29 Nov - 4 Dec 2009; Other Information: DOI: 10.1063/1.3483380; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRALITY
K*-892 MESONS
PARTICLE DECAY
PARTICLE WIDTHS
PERTURBATION THEORY
PION-PION INTERACTIONS
PIONS
QUARK-ANTIQUARK INTERACTIONS
REST MASS
RHO-770 MESONS
S QUARKS
SCATTERING LENGTHS
SU-3 GROUPS
UNITARITY
BOSONS
DECAY
DIMENSIONS
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
LENGTH
LIE GROUPS
MASS
MESON-MESON INTERACTIONS
MESONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
QUARKS
STRANGE MESONS
STRANGE PARTICLES
SU GROUPS
SYMMETRY GROUPS
VECTOR MESONS