What does a change in the quark condensate say about restoration of chiral symmetry in matter?

Journal Article · Wed May 01 00:00:00 EDT 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.53.R2048· OSTI ID:284002

Birse, M C ^[1]

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1. Theoretical Physics Group, Department of Physics and Astronomy, University of Manchester, Manchester, M13 9PL (United Kingdom)

The contribution of nucleons to the quark condensate in nuclear matter includes a piece of first order in {ital m}{sub {pi}}, arising from the contribution of low-momentum virtual pions to the {pi}{ital N} {sigma} commutator. Chiral symmetry requires that no term of this order appears in the {ital NN} interaction. The mass of a nucleon in matter thus cannot depend in any simple way on the quark condensate alone. More generally, pieces of the quark condensate that arise from low-momentum pions should not be associated with partial restoration of chiral symmetry. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 284002
• Journal Information: Physical Review, C, Vol. 53, Issue 5; Other Information: PBD: May 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
QUARK CONDENSATION
NUCLEAR MATTER
CHIRAL SYMMETRY
PIONS
NUCLEON-NUCLEON INTERACTIONS
MASS
NUCLEONS