6533b7d6fe1ef96bd1267001
RESEARCH PRODUCT
Nucleon and delta masses in QCD
Vicente VentoMagdalena Rafecassubject
QuarkPhysicsQuantum chromodynamicsNuclear and High Energy PhysicsParticle physicsField (physics)PropagatorFOS: Physical sciencesCromodinàmica quànticaHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Violació CP (Física nuclear)Path integral formulationTensorChiral symmetry breakingNucleondescription
Using the positivity of the path integral measure of $QCD$ and defining a structure for the quark propagator in a background field according to the fluxon scenario for confinement, we calculate and compare the correlators for nucleon and delta. From their shape we elucidate about the origin of their mass difference, which in our simplified scenario is due to the tensor structure in the propagator. This term arises due to a dynamical mechanism which is responsible simultaneously for confinement and spontaneous chiral symmetry breaking. Finally we discuss, by comparing the calculated correlators with the Lehmann representation, the possibility that a strong CP and/or P violation occurs as a consequence of a specific mechanism for confinement.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-01-01 |