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Title: Medium Modification of Vector Mesons

The theory of the strong interaction, Quantum Chromodynamics (QCD), has been remarkably successful in describing high-energy and short-distance-scale experiments involving quarks and gluons. However, applying QCD to low energy and large-distance scale experiments has been a major challenge. Various QCD-inspired models predict a partial restoration of chiral symmetry in nuclear matter with modifications of the properties of hadrons from their free-space values. Measurable changes such as a shift in mass and/or a change of width are predicted at normal nuclear density. Photoproduction of vector mesons off nuclei have been performed at different laboratories. The properties of the ρ, ω and φ mesons are investigated either directly by measuring their mass spectra or indirectly through transparency ratios. The latest results regarding medium modifications of the vector mesons in the nuclear medium will be discussed.
Authors:
Publication Date:
OSTI Identifier:
1013129
Report Number(s):
JLAB-PHY-11-1327; DOE/OR/23177-1552
TRN: US1102412
DOE Contract Number:
AC05-06OR23177
Resource Type:
Conference
Resource Relation:
Journal Name: Proceedings of Science; Journal Volume: ICHEP 2010; Conference: 35th International Conference On High Energy Physics: ICHEP 2010, 21-28 Jul 2010, Paris, France
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHIRAL SYMMETRY; GLUONS; HADRONS; HIGH ENERGY PHYSICS; MASS SPECTRA; MESONS; MODIFICATIONS; NUCLEAR MATTER; NUCLEI; PHOTOPRODUCTION; QUANTUM CHROMODYNAMICS; QUARKS; STRONG INTERACTIONS; VECTOR MESONS