Stopped Δ-matter source in heavy-ion collisions at 10 GeV/nucleon?

1994/11/14 by Markus Hofmann, M. Hofmann, Raffaele Mattiello +6 · 4 citations
Physics and Astronomy · #Atomic physics #Baryon #Delta baryon #Excitation #High-Energy Particle Collisions Research #Nuclear matter #Nuclear physics #Nuclear physics research studies #Nucleon #Observable #Particle physics #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Resonance (particle physics) #hep-ph #nucl-th

paper · pdf · doi:10.1103/physrevc.51.2095

published as Phys.Rev.C51:2095-2098,1995 · 17 pages, 5 postscript figures, uses psfig.sty and revtex.sty

arxiv created 1994/11/14 · openalex publication_date 1995/04/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We predict the formation of highly dense baryon-rich resonance matter in Au+Au collisions at the Brookhaven Alternating Gradient Synchrotron (AGS) energies. The final pion yields show observable signs for resonance matter. The \mathrm\ensuremathΔ₁₂₃₂ resonance is predicted to be the dominant source for pions of small transverse momenta. Rescattering effects---consecutive excitation and deexcitation of \ensuremathΔ's---lead to a long apparent lifetime (>10 fm/c) and rather large volumina (several 100 fm³) of the \ensuremathΔ-matter state. Heavier baryon resonances prove to be crucial for reaction dynamics and particle production at AGS.

Cited by

• Systematic study of the kaon to pion multiplicity ratios in heavy-ion collisions
• Signatures of quark-gluon plasma formation in high energy heavy-ion collisions: a critical review
• Relativistic transport theory ofN,Δ, andN*(1440) interacting throughσ,ω, andπmesons
• Excitation functions in central Au+Au collisions from SIS/GSI to AGS/Brookhaven