Nucleon sigma term and quark condensate in nuclear matter

Conference · Thu Mar 01 00:00:00 EST 2007 · Eur.Phys.J.A

DOI:https://doi.org/10.1140/epja/i2006-10179-4· OSTI ID:890983

Tsushima, K; Saito, K; Thomas, A W; Valcarce, A

We study the bound nucleon sigma term and its effect on the quark condensate in nuclear matter. In the quark-meson coupling (QMC) model it is shown that the nuclear correction to the sigma term is small and negative. Thus, the correction decelerates the decrease of the quark condensate in nuclear matter. However, the quark condensate in nuclear matter is controlled primarily by the scalar-isoscalar sigma field of the model. It appreciably moderates the decrease relative to the leading term at densities around and larger than the normal nuclear matter density.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE - Office of Energy Research (ER)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 890983
• Report Number(s): JLAB-THY-06-532; DOE/ER/40150-4024; nucl-th/0608062; TRN: US0604887
• Journal Information: Eur.Phys.J.A, Vol. 31; Conference: QNP06, June 5 - June 10, 2006, Madrid, Spain
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CONDENSATES
NUCLEAR MATTER
NUCLEONS
QUARKS
SIGMA TERMS