Unruh gamma radiation at RHIC?

Bı́ró, Tamás; Gyulassy, Miklós; Schram, Zsolt

doi:10.1016/j.physletb.2011.12.062

Cited by 16 publications

(23 citation statements)

References 30 publications

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“…To extract the spectrum of the photons radiated from the classical electromagnetic fields, Ref. [20] employs an interpretation that the frequency distribution of the radiation energy as the energy distribution of photons with the help of Einstein's relation. On the other hand, it is known that the classical electromagnetic field can be interpreted as the wave function of the corresponding photons [23][24][25][26].…”

Section: Wigner Function Of Electromagnetic Fieldsmentioning

confidence: 99%

Anisotropy of low energy direct photons in relativistic heavy ion collisions

Koide

Kodama

2016

J. Phys. G: Nucl. Part. Phys.

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We investigate the behavior of low energy photons radiated by the deceleration processes of two colliding nuclei in relativistic heavy ion collisions using the Wigner function approach for electromagnetic radiation fields. The angular distribution reveals the information of the initial geometric configurations. Such a property is reflected in the anisotropic parameter v2, showing an increasing v2 as energy decreases, which is a behavior qualitatively different from v2 from hadrons produced in the collisions.

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Section: Wigner Function Of Electromagnetic Fieldsmentioning

confidence: 99%

Anisotropy of low energy direct photons in relativistic heavy ion collisions

Koide

Kodama

2016

J. Phys. G: Nucl. Part. Phys.

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“…One can reinterpret this phenomenon a e-mail: horvath.miklos@wigner.mta.hu quasi-classically as the emission of photons. It is straightforward to calculate the differential yield of emitted photons when the charge accelerates uniformly on a straight line [17],…”

Section: Radiation Produced By Decelerating Sourcesmentioning

confidence: 99%

Elliptic flow due to radiation in heavy-ion collisions

2015

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Abstract.In this paper we demonstrate that radiation patterns could cause flow-like behaviour without any reference to hydrodynamic description. For that purpose we use a statistical ensemble of radiating dipoles, motivated by the investigation of the equivalent photon yield produced by decelerating charges. For the elliptic asymmetry factor, v 2, we find a reasonable agreement with experimental data.Hydrodynamical simulations are widely used to describe the early time evolution of proton-nucleus and heavy-ion collisions, see refs. [1][2][3][4][5][6][7][8][9][10][11] and the references therein. However, the fact that hydrodynamics has a strong predictive power does not imply that it is the only option to explain collective phenomena in such systems. There have been recent efforts to reproduce the flow patterns observed in RHIC and LHC using color scintillating antennas radiating gluons [12,13]. Other authors utilized phenomenological models of color-electric dipoles in order to account for angular correlations in high-energy processes [14][15][16]. It is an ongoing debate though, whether a simple effective model, lacking hydrodynamics, could catch the flow-like behaviour or not. Unfortunately, it is rather complicated to explain the collective properties using microscopical models as a starting point.In this letter, our goal is to demonstrate that the radiation originating from a dipole set-up is, in principle, able to match quantitatively the elliptic asymmetry factor v 2 , measured in heavy-ion experiments. To do so, we discuss the yield of massless particles produced by a decelerating point-like charge. Then we compute the flow coefficient v 2 of a dipole composed of two, parallel displaced counterdecelerating charges. Motivated by the formula in eq. (6), we fit various experimental data. Finally, we conclude our analysis discussing several open issues and their relevance for further, more realistic description. Radiation produced by decelerating sourcesAccording to electrodynamics, an accelerating point charge radiates. One can reinterpret this phenomenon a

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“…Or we experience pseudo-thermalization and pseudo-flow? Some hints towards that this might be the case dates back to 1975, when it was shown that simple acceleration may produce a thermal feeling, it may lead to radiation spectra appearing as the black-body radiation [2,3,4,5].…”

Section: Thermalizationmentioning

confidence: 99%