Delta(1232) and Nucleon Spectral Functions in Hot Hadronic Matter

Simple item page
dc.creatorvan Hees, Hendrik
dc.creatorRapp, Ralf
dc.date2004-07-16
dc.date2004-10-25
dc.date.accessioned2026-07-07T05:40:29Z
dc.date.available2026-07-07T05:40:29Z
dc.descriptionModifications of Delta(1232) and nucleon spectral functions at finite temperature and baryon density are evaluated in terms of resonant scattering off thermal pions, as well as a renormalization of the vacuum Delta-width including vertex corrections. The interactions are based on effective Lagrangians of pions and baryon resonances, with underlying parameters (coupling constants and form factors) determined by the elastic pi N scattering phase shift in the isobar channel, and by empirical decay branchings of excited resonances. Pion modifications are included via interactions in a pion gas, as well as standard Delta- and nucleon-hole excitations in nuclear matter. In hot hadronic matter, under conditions resembling thermal freezeout at the Relativistic Heavy-Ion Collider (RHIC), the Delta exhibits a significant broadening of ~65 MeV together with a slight upward peak shift of 5-10 MeV, in qualitative agreement with preliminary data from the STAR collaboration.
dc.description7 pages, 5 figures v2: Version accepted for publication in Phys. Lett. B, replaced one figure, added and updated references
dc.identifierhttps://arxiv.org/abs/nucl-th/0407050
dc.identifierhttp://arxiv.org/abs/nucl-th/0407050
dc.identifierPhys.Lett. B606 (2005) 59-66
dc.identifierdoi:10.1016/j.physletb.2004.10.062
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/82266
dc.subjectNuclear Theory
dc.titleDelta(1232) and Nucleon Spectral Functions in Hot Hadronic Matter
dc.typetext

Files

Collections

arXiv