Enhanced photon production from quark-gluon plasma: Finite-lifetime effect
Open accessAbstract
Photon production from a thermalized quark-gluon plasma of finite lifetime is studied directly in real time with a nonequilibrium formulation that includes off-shell (energy nonconserving) effects. To lowest order we find that production of direct photons form a quark-gluon plasma of temperature $T\ensuremath{\sim}200 \mathrm{MeV}$ and lifetime $t\ensuremath{\sim}10--20 \mathrm{fm}/c$ is strongly enhanced by off-shell (anti)quark bremsstrahlung $q(\overline{q})\ensuremath{\rightarrow}q(\overline{q})\ensuremath{\gamma}.$ The yield from this nonequilibrium finite-lifetime effect dominates over those obtained from higher order equilibrium rate calculations in the range of energy $E>2 \mathrm{GeV}$ and falls off with a power law for $E\ensuremath{\gg}T.$
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An important measure of this collective flow is elliptic flow in collisions with non-vanishing impact parameter (non-central).
“An important measure of this collective flow is elliptic flow [146] in collisions with non-vanishing impact parameter (non-central).”
From Phase Transitions in the Early and Present Universe (2006) · cites this paper as [146]
The paper’s introduction (p. 1) discusses QGP expansion and identifies photons as a proposed experimental signal; its analysis (pp. 3–4) concerns photon yield. Searches for elliptic flow, collective flow, and non-central collisions found no passage addressing elliptic flow as a measure of collective flow. (LLM, conf=0.77)
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Tuithung, K., & Singh, S. S. (2026) · Brazilian Journal of Physics · doi:10.1007/s13538-026-02069-9
- Authors
- Wang, S.-Y., & Boyanovsky, D.
- Affiliations
- University of Pittsburgh (US)
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 2001-01-31
- Volume
- 63
- Issue
- 5
- ISSN
- 0556-2821 (ISSN-L)
- 1089-4918
- OpenAlex
- W1984539219
- Cited by
- 29
- References
- 24
- Citations by year
- 2026: 1 · 2024: 1 · 2023: 1 · 2021: 1 · 2020: 1 · 2019: 1 · 2017: 2 · 2015: 1 · 2014: 3 · 2013: 3 · 2012: 1
- FWCI
- 2.05
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- Tamkang University Institutional Repository (TKUIR) (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › High-Energy Particle Collisions Research
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Quantum Chromodynamics and Particle Interactions
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Particle physics theoretical and experimental studies
- Keywords
- direct photon production, quark-gluon plasma, finite lifetime, nonequilibrium dynamics, off-shell effects, gluon bremsstrahlung, real-time dynamics
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