Vector meson dispersion in medium

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In nuclear medium, in addition to possible change in the vector meson mass, there will be breaking of Lorentz invariance and to leading order in the three momentum, the vector meson dispersion relation would be modified to ω2 - (1 + a)q2 - m2V = 0 with a ≠ 0. We formulate a QCD sum rule to find a to leading order in density, for ρ, ω and φ mesons. For both the longitudinal and transverse polarization direction of the vector meson with respect to q, we find less than 2 % (0.1 %) shift of the peak position at nuclear matter density and at q = 0.5 GeV/c for the ρ, ω (φ) mesons. This justifies neglecting the three momentum dependence and the polarization effect when implementing the universal scaling laws of the vector mesons in understanding the dilepton spectrum in A-A and p-A reaction.

Original languageEnglish
Pages (from-to)83-89
Number of pages7
JournalProgress of Theoretical Physics Supplement
Issue number129
DOIs
Publication statusPublished - 1997 Jan 1

Fingerprint

vector mesons
mesons
momentum
polarization
scaling laws
sum rules
invariance
quantum chromodynamics
shift

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

@article{4e41d1f6520444c6bc196db69b802af3,
title = "Vector meson dispersion in medium",
abstract = "In nuclear medium, in addition to possible change in the vector meson mass, there will be breaking of Lorentz invariance and to leading order in the three momentum, the vector meson dispersion relation would be modified to ω2 - (1 + a)q2 - m2V = 0 with a ≠ 0. We formulate a QCD sum rule to find a to leading order in density, for ρ, ω and φ mesons. For both the longitudinal and transverse polarization direction of the vector meson with respect to q, we find less than 2 {\%} (0.1 {\%}) shift of the peak position at nuclear matter density and at q = 0.5 GeV/c for the ρ, ω (φ) mesons. This justifies neglecting the three momentum dependence and the polarization effect when implementing the universal scaling laws of the vector mesons in understanding the dilepton spectrum in A-A and p-A reaction.",
author = "Lee, {Su Houng}",
year = "1997",
month = "1",
day = "1",
doi = "10.1143/PTPS.129.83",
language = "English",
pages = "83--89",
journal = "Progress of Theoretical Physics",
issn = "0033-068X",
publisher = "Yukawa Institute for Theoretical Physics",
number = "129",

}

Vector meson dispersion in medium. / Lee, Su Houng.

In: Progress of Theoretical Physics Supplement, No. 129, 01.01.1997, p. 83-89.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Vector meson dispersion in medium

AU - Lee, Su Houng

PY - 1997/1/1

Y1 - 1997/1/1

N2 - In nuclear medium, in addition to possible change in the vector meson mass, there will be breaking of Lorentz invariance and to leading order in the three momentum, the vector meson dispersion relation would be modified to ω2 - (1 + a)q2 - m2V = 0 with a ≠ 0. We formulate a QCD sum rule to find a to leading order in density, for ρ, ω and φ mesons. For both the longitudinal and transverse polarization direction of the vector meson with respect to q, we find less than 2 % (0.1 %) shift of the peak position at nuclear matter density and at q = 0.5 GeV/c for the ρ, ω (φ) mesons. This justifies neglecting the three momentum dependence and the polarization effect when implementing the universal scaling laws of the vector mesons in understanding the dilepton spectrum in A-A and p-A reaction.

AB - In nuclear medium, in addition to possible change in the vector meson mass, there will be breaking of Lorentz invariance and to leading order in the three momentum, the vector meson dispersion relation would be modified to ω2 - (1 + a)q2 - m2V = 0 with a ≠ 0. We formulate a QCD sum rule to find a to leading order in density, for ρ, ω and φ mesons. For both the longitudinal and transverse polarization direction of the vector meson with respect to q, we find less than 2 % (0.1 %) shift of the peak position at nuclear matter density and at q = 0.5 GeV/c for the ρ, ω (φ) mesons. This justifies neglecting the three momentum dependence and the polarization effect when implementing the universal scaling laws of the vector mesons in understanding the dilepton spectrum in A-A and p-A reaction.

UR - http://www.scopus.com/inward/record.url?scp=5544313468&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=5544313468&partnerID=8YFLogxK

U2 - 10.1143/PTPS.129.83

DO - 10.1143/PTPS.129.83

M3 - Article

AN - SCOPUS:5544313468

SP - 83

EP - 89

JO - Progress of Theoretical Physics

JF - Progress of Theoretical Physics

SN - 0033-068X

IS - 129

ER -