Numerical Simulation of Azimuthal Anisotropy of Direct Photons in High Energy Nucleusnucleus Collisions

MA Ke; ZHU Guang-xi; ZHOU Dai-cui

doi:10.11804/NuclPhysRev.27.04.426

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Article Navigation > Nuclear Physics Review > 2010 > 27(4): 426-431

MA Ke, ZHU Guang-xi, ZHOU Dai-cui. Numerical Simulation of Azimuthal Anisotropy of Direct Photons in High Energy Nucleusnucleus Collisions[J]. Nuclear Physics Review, 2010, 27(4): 426-431. doi: 10.11804/NuclPhysRev.27.04.426

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MA Ke, ZHU Guang-xi, ZHOU Dai-cui. Numerical Simulation of Azimuthal Anisotropy of Direct Photons in High Energy Nucleusnucleus Collisions[J]. Nuclear Physics Review, 2010, 27(4): 426-431. doi: 10.11804/NuclPhysRev.27.04.426

Numerical Simulation of Azimuthal Anisotropy of Direct Photons in High Energy Nucleusnucleus Collisions

doi: 10.11804/NuclPhysRev.27.04.426

1 Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2 Institue of Particle Physics, Central China Normal University, Wuhan 430079, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2010-12-20

Abstract

The azimuthal anisotropy of high p_T direct photons is investigated by using the coefficient of elliptic flow ν₂ in non-central nucleus-nucleus collision at LHC energies. These photons come from radiation induced by the interaction between jet and hot/dense medium. The azimuthal anisotropy of high p_T direct photons is investigated by using the coefficient of elliptic flow ν₂ in non-central nucleus-nucleus collision at LHC energies. These photons come There is π/2 difference between direct photons and hadrons for the azimuthal elliptic flow ν₂. Such photons are the main source of the negative part of ν₂ for direct photons. The dependence of the direct photon ν₂ on the transverse momentum p_T at LHC energy is found to be consistent with the experimental results at RHIC energy. Furthermore, we find that the value of the direct photon ν₂ at LHC energy is smaller than that at RHIC energy. The value of the transverse momentum at which the direct photon ν₂ changes from negative value to positive at LHC is higher than that at RHIC. It’sfound the enhanced jetquenching effect and enhanced contribution for the elliptic flow ν₂ of the direct photons emitted from surface at LHC energy.
- direct photon,
- high energy nucleusnucleus collision,
- jet-quenching,
- azimuthal anisotrop
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Numerical Simulation of Azimuthal Anisotropy of Direct Photons in High Energy Nucleusnucleus Collisions

doi: 10.11804/NuclPhysRev.27.04.426

1 Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2 Institue of Particle Physics, Central China Normal University, Wuhan 430079, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2010-12-20

Key words:

Abstract: The azimuthal anisotropy of high p_T direct photons is investigated by using the coefficient of elliptic flow ν₂ in non-central nucleus-nucleus collision at LHC energies. These photons come from radiation induced by the interaction between jet and hot/dense medium. The azimuthal anisotropy of high p_T direct photons is investigated by using the coefficient of elliptic flow ν₂ in non-central nucleus-nucleus collision at LHC energies. These photons come There is π/2 difference between direct photons and hadrons for the azimuthal elliptic flow ν₂. Such photons are the main source of the negative part of ν₂ for direct photons. The dependence of the direct photon ν₂ on the transverse momentum p_T at LHC energy is found to be consistent with the experimental results at RHIC energy. Furthermore, we find that the value of the direct photon ν₂ at LHC energy is smaller than that at RHIC energy. The value of the transverse momentum at which the direct photon ν₂ changes from negative value to positive at LHC is higher than that at RHIC. It’sfound the enhanced jetquenching effect and enhanced contribution for the elliptic flow ν₂ of the direct photons emitted from surface at LHC energy.