RT Journal Article
T1 f_(600), ρ(800), ρ(770) and K*(892), quark mass dependence from unitarized SU(3) Chiral Perturbation Theory
A1 Nebreda Manjón, Jenifer
A1 Peláez Sagredo, José Ramón
AB 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
PB American Institute of Physics
SN 0094-243X
YR 2010
FD 2010-08
LK https://hdl.handle.net/20.500.14352/44848
UL https://hdl.handle.net/20.500.14352/44848
LA eng
NO 1. C. Hanhart, J. R. Peláez and G. Rios, Phys. Rev. Lett. 100, 152001 (2008). 2. J. Nebreda and J. R. Peláez in preparation. 3. A. Dobado and J. R. Peláez, Phys. Rev. D 47 (1993) 4883; Phys. Rev. D 56 (1997) 3057. 4. A. Gómez Nicola and J. R. Peláez, Phys. Rev. D 65, 054009  (2002). 5. S. R. Beane et al. [NPLQCD Collaboration], Phys. Rev. D 77, 094507 (2008) and Phys. Rev. D 77, 014505 (2008); S. R. Beane et al. Phys. Rev. D 74, 114503 (2006); Ph. Boucaud et al. [ETM collaboration], Comput. Phys. Commun. 179, 695 (2008). 6. G. Amoros, J. Bijnens and P. Talavera, Nucl. Phys. B 602, 87 (2001). 7. J. R. Peláez, Mod. Phys. Lett. A 19, 2879 (2004). 8. S. Aoki et al. [CP-PACS Collaboration], Phys. Rev. D 76, 094506 (2007).
NO ©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.
NO Unión Europea. FP7
NO Ministerio de Educación y Ciencia
NO U.Complutense/Banco Santander
NO FIS2006-03438
DS Docta Complutense
RD 27 abr 2024