Electromagnetic probes

Chatterjee, Rupa; Bhattacharya, Lusaka; Srivastava, Dinesh K.

doi:10.48550/arxiv.0901.3610

Cited by 3 publications

(6 citation statements)

References 58 publications

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“…The important parameter used to characterize the emitted dilepton spectrum is its invariant mass (M ) that can be broadly divided in three distinct ranges, namely, low with M < M φ (= 1.024 GeV), intermediate with M φ < M < M J/ψ (= 3.1 GeV), and high (M > M J/ψ ). The intermediate mass range is important for getting the QGP signature and in this region the radiation from QGP dominates the mass spectrum [17].…”

Section: Introductionmentioning

confidence: 99%

Hard dilepton production from a weakly magnetized hot QCD medium

et al. 2019

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We have computed the hard dilepton production rate from a weakly magnetized deconfined QCD medium within one-loop photon self-energy by considering one hard and one thermomagnetic resummed quark propagator in the loop. In the presence of the magnetic field, the resummed propagator leads to four quasiparticle modes. The production of hard dileptons consists of rates when all four quasiquarks originating from the poles of the propagator individually annihilate with a hard quark coming from a bare propagator in the loop. Besides these, there are also contributions from a mixture of pole and Landau cut part. In weak field approximation, the magnetic field appears as a perturbative correction to the thermal contribution. Since the calculation is very involved, for a first effort as well as for simplicity, we obtained the rate up to first order in the magnetic field, i.e., O[(eB)], which causes a marginal improvement over that in the absence of magnetic field. * aritra.das@saha.ac.in † nhaque@niser.ac.in

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Section: Introductionmentioning

confidence: 99%

Hard dilepton production from a weakly magnetized hot QCD medium

et al. 2019

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“…In the following, I will discuss briefly about thermal photons. For more detailed information, see [115][116] [117].…”

Section: Photonsmentioning

confidence: 99%

“…As for photons, emission rates are to be convoluted over the space-time volume to obtain production yield in nucleus-nucleus collisions. For more details see [115].…”

Section: Dileptonsmentioning

confidence: 99%

A Short Course on Relativistic Heavy Ion Collisions

Chaudhuri

2014

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“…We also note that the inclusion of shadowing leads to a significant variation in the end result so that at lower transverse momenta, the single photon production goes up. The middle and the lower panels of the figure show the results for x T = 2p T / √ s scaling with the inclusion of iso-spin and parton shadowing at SPS, RHIC, and LHC energies [11]. The deviations from a scaling behaviour are due to the scale dependence of the structure functions and the QCD interactions [22].…”

Section: Prompt Photonsmentioning

confidence: 99%

“…Middle panel: Effect of iso-spin at SPS, RHIC, and LHC energies as a function of xT = 2pT / √ s. Lower panel: Same as before with shadowing. (see Ref [11]…”

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confidence: 99%

Single photons from relativistic collisions of lead nuclei at energies available at the CERN Super Proton Synchrotron (SPS): A reanalysis

2009

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We present a reanalysis of single photon production from relativistic collision of lead nuclei at CERN SPS measured by the WA98 experiment. The refinements include use of iso-spin and shadowing corrected NLO pQCD treatment for prompt photon production using an optimized scale for factorization, renormalization, and fragmentation and use of hydrodynamics suited for non-central collisions along with a well tested equation of state admitting a quark-hadron phase transition. A quantitative explanation of the data requires a large initial temperature (at a small formation time of about 0.2 fm/c) and a moderate increase in the prompt yield which could perhaps be attributed to the Cronin effect in nuclei. The data can also be explained using a moderate initial temperature (at a formation time of about 1 fm/c) with a very large K-factor multiplying the prompt yield. We show that different initial times give rise to different values for the elliptic flow parameter v2 for thermal photons. We also show that a measurement of v2 for thermal photons could also distinguish between the scenarios with or without a phase transition.

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Electromagnetic probes

Abstract: We introduce the seminal developments in the theory and experiments of electromagnetic probes for the study of the dynamics of relativistic heavy ion collisions and quark gluon plasma.

Cited by 3 publications

References 58 publications

Hard dilepton production from a weakly magnetized hot QCD medium

Hard dilepton production from a weakly magnetized hot QCD medium

A Short Course on Relativistic Heavy Ion Collisions

Single photons from relativistic collisions of lead nuclei at energies available at the CERN Super Proton Synchrotron (SPS): A reanalysis

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