1994/10/04 by M. A. Moinester, Murray A. Moinester, Moinester, Murray A.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.48550/arxiv.hep-ph/9410215
3 pages text (latex), Tel Aviv U. Preprint TAUP 2207-94, Presented at the Workshop on Chiral Dynamics, Massachusetts Institute of Technology, July 1994
arxiv created 1994/10/04 · openalex publication_date 1994/10/04 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Can one expect gamma rays rates from the QGP to be higher than from the hot hadronic gas phase? Xiong, Shuryak, Brown (XSB) calculate photon production from a hot hadronic gas via the reaction π- + ρ0 → π- + γ. They assume that this reaction proceeds through the a1(1260). They also use their estimated a1 radiative width to calculate the pion polarizability; following a connection noted previously by Holstein. However, for a1(1260) → πγ, the experimental radiative width is more than two times less than the value 1.4 MeV estimated and used by XSB. We describe how the gamma production reaction can be studied in Fermilab E781 (via the inverse reaction, with detailed balance) via the Primakoff reaction π- + γ→ π- + ρ0. Such a study can provide the data base for evaluations of the utility of gamma production experiments in QGP searches. One can experimentally check the a1 dominance assumption of XSB. A remeasurement of the a1(1260) radiative width and of the pion polarizability in Fermilab E781 will also allow us to reevaluate the consistency of their expected relationship.