Elliptic Flow Measurement of Direct Photon in s<SUB>NN</SUB>=200GeV Au+Au Collisions at RHIC-PHENIX

Kentaro Miki

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2024年10月30日

Chinese Physics C> 2007, Vol. 31> Issue(12) : 1174-1176

Elliptic Flow Measurement of Direct Photon in s_NN=200GeV Au+Au Collisions at RHIC-PHENIX

Kentaro Miki ^,

University of Tsukuba, Tsukuba, Ibaraki 305, Japan

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Abstract：
Azimuthal anisotropy of direct photon is measured in s_NN=200GeV Au+Au collisions at RHIC-PHENIX. Direct photon is one of the most effective probes to study properties of hot dence medium at initial state (also QGP state) of heavy ion collisions because photons almost do not interact strongly with any other particles caused by its long mean free path and they keep their conditions when they are created. Within statistical and systematic errors, the elliptic flow parameter (v₂) of direct photon is consistent with zero. Direct photon v₂ is estimated by hadron decay photon contamination are subtracted from inclusive photon v₂ in intermediate to high transverse momentum (p_T) region (0 to 10GeV/c) for 3 centrality selections (20% steps) and minimum bias.

References

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Kentaro Miki. Elliptic Flow Measurement of Direct Photon in s_NN=200GeV Au+Au Collisions at RHIC-PHENIX[J]. Chinese Physics C, 2007, 31(12): 1174-1176.

Kentaro Miki. Elliptic Flow Measurement of Direct Photon in s_NN=200GeV Au+Au Collisions at RHIC-PHENIX[J]. Chinese Physics C, 2007, 31(12): 1174-1176. shu

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Received: 2007-07-17
Revised: 1900-01-01

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通讯作者: 陈斌, [email protected]

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沈阳化工大学材料科学与工程学院沈阳 110142

Elliptic Flow Measurement of Direct Photon in s_NN=200GeV Au+Au Collisions at RHIC-PHENIX

Kentaro Miki ^,

Corresponding author: Kentaro Miki,

University of Tsukuba, Tsukuba, Ibaraki 305, Japan

Received Date: 2007-07-17
Accepted Date: 1900-01-01
Available Online: 2007-12-05

Abstract: Azimuthal anisotropy of direct photon is measured in s_NN=200GeV Au+Au collisions at RHIC-PHENIX. Direct photon is one of the most effective probes to study properties of hot dence medium at initial state (also QGP state) of heavy ion collisions because photons almost do not interact strongly with any other particles caused by its long mean free path and they keep their conditions when they are created. Within statistical and systematic errors, the elliptic flow parameter (v₂) of direct photon is consistent with zero. Direct photon v₂ is estimated by hadron decay photon contamination are subtracted from inclusive photon v₂ in intermediate to high transverse momentum (p_T) region (0 to 10GeV/c) for 3 centrality selections (20% steps) and minimum bias.

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Elliptic Flow Measurement of Direct Photon in s_NN=200GeV Au+Au Collisions at RHIC-PHENIX

Elliptic Flow Measurement of Direct Photon in s_NN=200GeV Au+Au Collisions at RHIC-PHENIX