Muon pairs and photon pairs as signals for the hadronization phase transition at finite baryon density
In an isentropic expansion of a baryon-rich quark-gluon plasma (QGP) formed in heavy-ion collisions and undergoing a first-order phase transition into a hadron-resonance gas, it is found that an analysis of the production cross sections of dimuons in the region where the invariant mass M is greater than 2.25 GeV is enough for the detection of a QGP, whereas an analysis in the region with Mapprox. >7.5 GeV is required for photon pairs. While the production cross section of dimuons is found to be almost independent of the equation of state used for the QGP, that for photon pairs depends on the equation of state of the QGP. We conclude that for the detection of the QGP muon pairs are better signals than photon pairs, whereas for a study of the equation of state of the QGP photon pairs seem to be more suitable than muon pairs.
- Research Organization:
- Department of Nuclear Physics, University of Madras, Madras 600 025, India
- OSTI ID:
- 6751591
- Journal Information:
- Phys. Rev. D; (United States), Vol. 38:9
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HEAVY ION REACTIONS
PARTICLE PRODUCTION
QUARK MATTER
PHASE TRANSFORMATIONS
CROSS SECTIONS
EQUATIONS OF STATE
MASS SPECTRA
MUONS
PAIR PRODUCTION
PHOTONS
QUANTUM CHROMODYNAMICS
CHARGED-PARTICLE REACTIONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FIELD THEORIES
INTERACTIONS
LEPTONS
MASSLESS PARTICLES
MATTER
NUCLEAR REACTIONS
QUANTUM FIELD THEORY
SPECTRA
645204* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties
645400 - High Energy Physics- Field Theory