RT Journal Article
T1 Chiral and U(1)A restoration for the scalar and pseudoscalar meson nonets
A1 Gómez Nicola, Ángel
A1 Ruiz de Elvira, Jacobo
AB We analyze the restoration pattern of the members of the scalar and pseudoscalar meson nonets under chiral O ( 4 ) and U ( 1 ) A symmetries. For that purpose, we exploit QCD Ward identities (WI), which allow one to relate susceptibilities with quark condensates, as well as susceptibility differences with meson vertices. In addition, we consider the low-energy realization of QCD provided by U ( 3 ) chiral perturbation theory (ChPT) at finite temperature to perform a full analysis of the different correlators involved. Our analysis suggests U ( 1 ) A partner restoration if chiral symmetry partners are also degenerated. This is also confirmed by the ChPT analysis when the light chiral limit is reached. Partner degeneration for the I = 1 / 2 sector, the behavior of I = 0 mixing and the temperature scaling of meson masses predicted by WI are also studied. Special attention is paid to the connection of our results with recent lattice analyses.
PB APS Physics
SN 2470-0010
YR 2018
FD 2018-07-16
LK https://hdl.handle.net/20.500.14352/12867
UL https://hdl.handle.net/20.500.14352/12867
LA eng
NO Ministerio de Economía y Competitividad (MINECO)
DS Docta Complutense
RD 28 abr 2024