Nonperturbative finite T broadening of the {rho} meson and dilepton emission in heavy-ion collisions

Ruppert, Joerg; Renk, Thorsten

doi:10.1103/PhysRevC.71.064903

Title: Nonperturbative finite T broadening of the {rho} meson and dilepton emission in heavy-ion collisions

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Abstract

We study self-consistently the finite T broadening of the {rho} meson and its implications for dilepton emission in heavy-ion collisions. For this purpose finite width effects at finite temperature due to the {rho}-{pi} interaction are investigated in a self-consistent {phi}-functional approach. The temperature dependence of the {rho} meson and pion spectral functions and self-energies is discussed. The spectral functions show considerable broadening in comparison with a perturbative calculation on the one-loop level. Using these spectral functions, we make a comparison to dilepton emission data from the CERES NA49 Collaboration employing a parametrized fireball evolution model of collision. We demonstrate that these nonperturbative finite width effects are in-medium modifications relevant to the understanding of the enhancement of the low invariant mass spectrum of dileptons emitted in A-A collisions.

Authors:

Ruppert, Joerg; Renk, Thorsten ^[1]

Department of Physics, Duke University, Physics Building, Science Drive, Box 90305, Durham, North Carolina 27708-0305 (United States)

Publication Date:: Wed Jun 01 00:00:00 EDT 2005

OSTI Identifier:: 20698769

Resource Type:: Journal Article

Journal Name:: Physical Review. C, Nuclear Physics

Additional Journal Information:: Journal Volume: 71; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevC.71.064903; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COMPARATIVE EVALUATIONS; ELECTRON EMISSION; FIREBALL MODEL; HEAVY ION REACTIONS; MASS SPECTRA; MESON-MESON INTERACTIONS; NUCLEAR MATTER; PIONS; RHO-770 MESONS; SELF-ENERGY; SPECTRAL FUNCTIONS; STRONG INTERACTIONS; TEMPERATURE DEPENDENCE

Citation Formats


                    Ruppert, Joerg, and Renk, Thorsten. Nonperturbative finite T broadening of the {rho} meson and dilepton emission in heavy-ion collisions.  United States: N. p., 2005. 
        Web.  doi:10.1103/PhysRevC.71.064903.

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                    Ruppert, Joerg, & Renk, Thorsten. Nonperturbative finite T broadening of the {rho} meson and dilepton emission in heavy-ion collisions.  United States.  https://doi.org/10.1103/PhysRevC.71.064903

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                    Ruppert, Joerg, and Renk, Thorsten. 2005.  
        "Nonperturbative finite T broadening of the {rho} meson and dilepton emission in heavy-ion collisions".  United States.  https://doi.org/10.1103/PhysRevC.71.064903.

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@article{osti_20698769,

  title        = {Nonperturbative finite T broadening of the {rho} meson and dilepton emission in heavy-ion collisions},

  author       = {Ruppert, Joerg and Renk, Thorsten},

  abstractNote = {We study self-consistently the finite T broadening of the {rho} meson and its implications for dilepton emission in heavy-ion collisions. For this purpose finite width effects at finite temperature due to the {rho}-{pi} interaction are investigated in a self-consistent {phi}-functional approach. The temperature dependence of the {rho} meson and pion spectral functions and self-energies is discussed. The spectral functions show considerable broadening in comparison with a perturbative calculation on the one-loop level. Using these spectral functions, we make a comparison to dilepton emission data from the CERES NA49 Collaboration employing a parametrized fireball evolution model of collision. We demonstrate that these nonperturbative finite width effects are in-medium modifications relevant to the understanding of the enhancement of the low invariant mass spectrum of dileptons emitted in A-A collisions.},

  doi          = {10.1103/PhysRevC.71.064903},

  url          = {https://www.osti.gov/biblio/20698769},
  journal      = {Physical Review. C, Nuclear Physics},

  issn         = {0556-2813},

  number       = 6,

  volume       = 71,

  place        = {United States},

  year         = {Wed Jun 01 00:00:00 EDT 2005},

  month        = {Wed Jun 01 00:00:00 EDT 2005}

}

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