f_(600), ρ(800), ρ(770) and K*(892), quark mass dependence from unitarized SU(3) Chiral Perturbation Theory



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Nebreda Manjón, Jenifer and Peláez Sagredo, José Ramón (2010) f_(600), ρ(800), ρ(770) and K*(892), quark mass dependence from unitarized SU(3) Chiral Perturbation Theory. AIP conference proceedings, 1257 (5). ISSN 0094-243X

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Official URL: http://dx.doi.org/10.1063/1.3483380


We study the strange and non-strange quark mass dependence of the parameters of the f_0(600), κ(800), ρ(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 ith 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 ρ(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_0(600) dependence on both quark masses is stronger than for the к(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

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©American Institute of Physics.
International Conference on Hadron Spectroscopy (13. 2009.Tallahassee, Filadelfia).
Work partially supported by Spanish Ministerio de Educación y Ciencia contracts: FPA2007-29115-E, FPA2008-00592 and FIS2006-03438, U.Complutense/Banco Santander grant PR34/07-15875-BSCH and UCM-BSCH GR58/08 910309 as well as the European Community-Research Infrastructure Integrating Activity “Study of Strongly Interacting Matter” (HadronPhysics2, Grant Agreement n. 227431) under the Seventh Framework Programme of the EU.

Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:35133
Deposited On:21 Jan 2016 17:39
Last Modified:10 Dec 2018 15:09

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