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Title: Rho meson in dense hadronic matter

Abstract

The spectral function of a rho meson that is at rest in dense hadronic matter and couples strongly to the pion is studied in the vector dominance model by including the effect of the delta-hole polarization of the pion. With the free rho-meson mass in the Lagrangian, we find that both the rho-meson peak and width increase with increasing nuclear density, and that a low-mass peak appears at invariant mass around three times the pion mass. Including the decreasing density-dependent hadron masses in the Lagrangian as suggested by the scaling law of Brown and Rho, we find instead that the rho peak moves to smaller invariant masses with diminishing strength when the nuclear density increases. The low-mass peak also shifts down with increasing density and becomes more pronounced. The relevance of the rho-meson property in dense matter to delepton production in heavy-ion collisions is discussed.

Authors:
; ; ;  [1]
  1. (Cyclotron Institute and Physics Department, Texas A M University, College Station, Texas 77843 (United States))
Publication Date:
OSTI Identifier:
7001741
Alternate Identifier(s):
OSTI ID: 7001741
Resource Type:
Journal Article
Journal Name:
Physical Review, C (Nuclear Physics); (United States)
Additional Journal Information:
Journal Volume: 46:4; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; NUCLEAR MATTER; VECTOR DOMINANCE MODEL; RHO-770 MESONS; SPECTRAL FUNCTIONS; MESONS; SCALING LAWS; BOSONS; ELEMENTARY PARTICLES; FUNCTIONS; HADRONS; MATHEMATICAL MODELS; MATTER; PARTICLE MODELS; VECTOR MESONS 662420* -- Properties of Mesons & Meson Resonances-- (1992-)

Citation Formats

Asakawa, M., Ko, C.M., Levai, P., and Qiu, X.J. Rho meson in dense hadronic matter. United States: N. p., 1992. Web. doi:10.1103/PhysRevC.46.R1159.
Asakawa, M., Ko, C.M., Levai, P., & Qiu, X.J. Rho meson in dense hadronic matter. United States. doi:10.1103/PhysRevC.46.R1159.
Asakawa, M., Ko, C.M., Levai, P., and Qiu, X.J. Thu . "Rho meson in dense hadronic matter". United States. doi:10.1103/PhysRevC.46.R1159.
@article{osti_7001741,
title = {Rho meson in dense hadronic matter},
author = {Asakawa, M. and Ko, C.M. and Levai, P. and Qiu, X.J.},
abstractNote = {The spectral function of a rho meson that is at rest in dense hadronic matter and couples strongly to the pion is studied in the vector dominance model by including the effect of the delta-hole polarization of the pion. With the free rho-meson mass in the Lagrangian, we find that both the rho-meson peak and width increase with increasing nuclear density, and that a low-mass peak appears at invariant mass around three times the pion mass. Including the decreasing density-dependent hadron masses in the Lagrangian as suggested by the scaling law of Brown and Rho, we find instead that the rho peak moves to smaller invariant masses with diminishing strength when the nuclear density increases. The low-mass peak also shifts down with increasing density and becomes more pronounced. The relevance of the rho-meson property in dense matter to delepton production in heavy-ion collisions is discussed.},
doi = {10.1103/PhysRevC.46.R1159},
journal = {Physical Review, C (Nuclear Physics); (United States)},
issn = {0556-2813},
number = ,
volume = 46:4,
place = {United States},
year = {1992},
month = {10}
}