Photon production and elliptic flow from a momentum-anisotropic quark-gluon plasma
Abstract
The emission of real photons from a momentum-anisotropic quark-gluon plasma (QGP) is affected by both the collective flow of the radiating medium and the modification of the local rest frame emission rate due to the anisotropic momentum distribution of partonic degrees of freedom. In this paper, we first calculate the photon production rate from an ellipsoidally momentum-anisotropic QGP including hard contributions from Compton scattering and quark pair annihilation and soft contribution calculated using the hard thermal loop approximation. We introduce a parametrization of the nonequilibrium rate in order to facilitate its further application in yield and flow calculations. We convolve the anisotropic photon rate with the space-time evolution of QGP provided by 3 + 1d anisotropic hydrodynamics to obtain the yield and the elliptic flow coefficient $$v_2$$ of photons from QGP generated at Pb-Pb collisions at the LHC at 2.76 TeV and Au-Au collisions at the RHIC at 200 GeV. We investigate the effects of various parameters on the results. In particular, we analyze the sensitivity of the results to initial momentum anisotropy.
- Publication Date:
- Research Org.:
- Kent State Univ., Kent, OH (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1641864
- Alternate Identifier(s):
- OSTI ID: 1802496
- Grant/Contract Number:
- SC0013470
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 102 Journal Issue: 1; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Astronomy & Astrophysics; Physics
Citation Formats
Kasmaei, Babak S., and Strickland, Michael. Photon production and elliptic flow from a momentum-anisotropic quark-gluon plasma. United States: N. p., 2020.
Web. doi:10.1103/PhysRevD.102.014037.
Kasmaei, Babak S., & Strickland, Michael. Photon production and elliptic flow from a momentum-anisotropic quark-gluon plasma. United States. https://doi.org/10.1103/PhysRevD.102.014037
Kasmaei, Babak S., and Strickland, Michael. Wed .
"Photon production and elliptic flow from a momentum-anisotropic quark-gluon plasma". United States. https://doi.org/10.1103/PhysRevD.102.014037.
@article{osti_1641864,
title = {Photon production and elliptic flow from a momentum-anisotropic quark-gluon plasma},
author = {Kasmaei, Babak S. and Strickland, Michael},
abstractNote = {The emission of real photons from a momentum-anisotropic quark-gluon plasma (QGP) is affected by both the collective flow of the radiating medium and the modification of the local rest frame emission rate due to the anisotropic momentum distribution of partonic degrees of freedom. In this paper, we first calculate the photon production rate from an ellipsoidally momentum-anisotropic QGP including hard contributions from Compton scattering and quark pair annihilation and soft contribution calculated using the hard thermal loop approximation. We introduce a parametrization of the nonequilibrium rate in order to facilitate its further application in yield and flow calculations. We convolve the anisotropic photon rate with the space-time evolution of QGP provided by 3 + 1d anisotropic hydrodynamics to obtain the yield and the elliptic flow coefficient $v_2$ of photons from QGP generated at Pb-Pb collisions at the LHC at 2.76 TeV and Au-Au collisions at the RHIC at 200 GeV. We investigate the effects of various parameters on the results. In particular, we analyze the sensitivity of the results to initial momentum anisotropy.},
doi = {10.1103/PhysRevD.102.014037},
journal = {Physical Review D},
number = 1,
volume = 102,
place = {United States},
year = {Wed Jul 22 00:00:00 EDT 2020},
month = {Wed Jul 22 00:00:00 EDT 2020}
}
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https://doi.org/10.1103/PhysRevD.102.014037
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