Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 한인식 | * |
dc.date.accessioned | 2023-08-03T16:31:03Z | - |
dc.date.available | 2023-08-03T16:31:03Z | - |
dc.date.issued | 2023 | * |
dc.identifier.issn | 2469-9985 | * |
dc.identifier.issn | 2469-9993 | * |
dc.identifier.other | OAK-33455 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/265472 | - |
dc.description.abstract | The measurement of direct photons from Au + Au collisions at ,/sNN = 39 and 62.4 GeV in the transverse-momentum range 0.4 < pT < 3 Gev/c is presented by the PHENIX collaboration at the BNLRelativistic Heavy Ion Collider. A significant direct-photon yield is observed in both collision systems. A universal scaling is observed when the direct-photon pT spectra for different center-of-mass energies and for different centrality selections at ,/sNN = 62.4 GeV is scaled with (dNch/d eta)alpha for alpha = 1.21 +/- 0.04. This scaling also holds true for direct-photon spectra from Au + Au collisions at ,/sNN = 200 GeV measured earlier by PHENIX, as well as the spectra from Pb + Pb at ,/sNN = 2760 GeV published by ALICE. The scaling power alpha seems to be independent of pT, center of mass energy, and collision centrality. The spectra from different collision energies have a similar shape up to pT of 2 Gev/c. The spectra have a local inverse slope Teff increasing with pT of 0.174 +/- 0.018 Gev/c in the range 0.4 < pT < 1.3 Gev/c and increasing to 0.289 +/- 0.024 Gev/c for 0.9 < pT < 2.1 Gev/c. The observed similarity of low-pT direct-photon production from ,/sNN = 39 to 2760 GeV suggests a common source of direct photons for the different collision energies and event centrality selections, and suggests a comparable space-time evolution of direct-photon emission. | * |
dc.language | English | * |
dc.publisher | AMER PHYSICAL SOC | * |
dc.title | Low-pT direct-photon production in Au plus Au collisions at root sNN=39 and 62.4 GeV | * |
dc.type | Article | * |
dc.relation.issue | 2 | * |
dc.relation.volume | 107 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.journaltitle | PHYSICAL REVIEW C | * |
dc.identifier.doi | 10.1103/PhysRevC.107.024914|http://dx.doi.org/10.1103/PhysRevC.107.024914 | * |
dc.identifier.wosid | WOS:000982377900006 | * |
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dc.contributor.scopusid | 한인식(7201832280;57205469686;57192312712) | * |
dc.date.modifydate | 20240415134453 | * |