RT Journal Article
T1 Light- and strange-quark mass dependence of the ρ(770) meson revisited
A1 Molina, R. A.
A1 Ruiz De Elvira Carrascal, Jacobo
AB Recent lattice data on ππ-scattering phase shifts in the vector-isovector channel, pseudoscalar meson masses and decay constants for strange-quark masses smaller or equal to the physical value allow us to study the strangeness dependence of these observables for the first time. We perform a global analysis on two kind of lattice trajectories depending on whether the sum of quark masses or the strange-quark mass is kept fixed to the physical point. The quark mass dependence of these observables is extracted from unitarized coupled-channel one-loop Chiral Perturbation Theory. This analysis guides new predictions on the ρ(770) meson properties over trajectories where the strange-quark mass is lighter than the physical mass, as well as on the SU(3) symmetric line. As a result, the light- and strange-quark mass dependence of the ρ(770) meson parameters are discussed and precise values of the Low Energy Constants present in unitarized one-loop Chiral Perturbation Theory are given. Finally, the current discrepancy between two- and three-flavor lattice results for the ρ(770) meson is studied.
PB Springer
SN 1029-8479
YR 2020
FD 2020-11-06
LK https://hdl.handle.net/20.500.14352/7265
UL https://hdl.handle.net/20.500.14352/7265
LA eng
NO Unión Europea. Horizonte 2020
NO Ministerio de Ciencia e Innovación (MICINN)
NO Universidad Complutense de Madrid/Comunidad de Madrid
NO Fundacao de amparoa pesquisa do estado de S˜ao Paulo (FAPESP), the Talento Program of the Community of Madrid and the Complutense University of Madrid
NO Marion Redfearn Trust
DS Docta Complutense
RD 8 abr 2025