Medium effects on the rho meson

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.48.R526· OSTI ID:6216772

Asakawa, M; Ko, C M ^[1]

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1. Cyclotron Institute and Physics Department, Texas A M University, College Station, Texas 77843 (United States)

The property of a rho meson in dense nuclear matter is studied using the QCD sum rule. The spectral function appearing on the hadronic side of the sum is evaluated in the vector dominance model that takes into account the interaction between the rho meson and the pion. Including pion modification by the delta-hole polarization in the nuclear medium, we find that as the nuclear density increases the rho meson peak in the spectral function shifts to smaller invariant masses and its width becomes smaller. We discuss the possibility of studying the rho meson property in dense matter via the dilepton invariant mass spectrum from heavy-ion collisions.

• OSTI ID: 6216772
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 48:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

662230* -- Quantum Chromodynamics-- (1992-)
663450 -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOSONS
CHARGED-PARTICLE REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EQUATIONS
FIELD THEORIES
FUNCTIONS
HADRONS
HEAVY ION REACTIONS
MATHEMATICAL MODELS
MATTER
MESONS
NUCLEAR MATTER
NUCLEAR REACTIONS
PARTICLE MODELS
PIONS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RELATIVISTIC RANGE
RHO-770 MESONS
SPECTRAL FUNCTIONS
SUM RULES
VECTOR DOMINANCE MODEL
VECTOR MESONS