Good and bad diquark properties and spatial correlations in lattice QCD

We study good, bad and not-even-bad diquarks on the lattice in a gauge-invariant formalism in full QCD. We establish their spectral masses with short extrapolations to the physical point, observing agreement with phenomenological expectations. We find that only the good diquark has attractive quark-...

Descripción completa

Detalles Bibliográficos
Autores principales: Francis, Anthony, de Forcrand, Ph., Lewis, Randy, Maltman, Kim
Lenguaje:eng
Publicado: 2022
Materias:
hep-ph
Particle Physics - Phenomenology
hep-lat
Particle Physics - Lattice
Acceso en línea:https://dx.doi.org/10.31349/SuplRevMexFis.3.0308082
http://cds.cern.ch/record/2799237
Descripción
Sumario:We study good, bad and not-even-bad diquarks on the lattice in a gauge-invariant formalism in full QCD. We establish their spectral masses with short extrapolations to the physical point, observing agreement with phenomenological expectations. We find that only the good diquark has attractive quark-quark spatial correlations, with spherical shape and size of about 0.6 fm. Our results provide quantitative support for modelling the low-lying baryon spectrum using good light diquark effective degrees of freedom.

Ejemplares similares