η meson production of high-energy nuclear collisions at NLO
The transverse momentum spectrum of η meson in relativistic heavy-ion collisions is studied at the Next-to-Leading Order (NLO) within the perturbative QCD, where the jet quenching effect in the QGP is incorporated with the effectively medium-modified η fragmentation functions using the higher-twist...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2015-11-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269315007285 |
| _version_ | 1828739954679742464 |
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| author | Wei Dai Xiao-Fang Chen Ben-Wei Zhang Enke Wang |
| author_facet | Wei Dai Xiao-Fang Chen Ben-Wei Zhang Enke Wang |
| author_sort | Wei Dai |
| collection | DOAJ |
| description | The transverse momentum spectrum of η meson in relativistic heavy-ion collisions is studied at the Next-to-Leading Order (NLO) within the perturbative QCD, where the jet quenching effect in the QGP is incorporated with the effectively medium-modified η fragmentation functions using the higher-twist approach. We show that the theoretical simulations could give nice descriptions of PHENIX data on η meson in both p+p and central Au + Au collisions at the RHIC, and also provide numerical predictions of η spectra in central Pb + Pb collisions with sNN=2.76 TeV at the LHC. The ratios of η/π0 in p+p and in central Au + Au collisions at 200 GeV are found to overlap in a wide pT region, which matches well the measured ratio η/π0 by PHENIX. We demonstrate that, at the asymptotic region when pT→∞ the ratios of η/π0 in both Au + Au and p+p are almost determined only by quark jets fragmentation and thus approach to the one in e+e− scattering; in addition, the almost identical gluon (quark) contribution fractions to η and to π result in a rather moderate variation of η/π0 distribution at intermediate and high pT region in A+A relative to that in p+p; while a slightly higher η/π0 at small pT in Au + Au can be observed due to larger suppression of gluon contribution fraction to π0 as compared to the one to η. The theoretical prediction for η/π0 at the LHC has also been presented. |
| first_indexed | 2024-04-13T00:31:37Z |
| format | Article |
| id | doaj.art-d86ae6c124e34a23ad7c4dc6725951f4 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-04-13T00:31:37Z |
| publishDate | 2015-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-d86ae6c124e34a23ad7c4dc6725951f42022-12-22T03:10:27ZengElsevierPhysics Letters B0370-26931873-24452015-11-01750C39039510.1016/j.physletb.2015.09.053η meson production of high-energy nuclear collisions at NLOWei Dai0Xiao-Fang Chen1Ben-Wei Zhang2Enke Wang3Physics Department, Tsinghua University, Beijing, ChinaSchool of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, ChinaKey Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, ChinaKey Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, ChinaThe transverse momentum spectrum of η meson in relativistic heavy-ion collisions is studied at the Next-to-Leading Order (NLO) within the perturbative QCD, where the jet quenching effect in the QGP is incorporated with the effectively medium-modified η fragmentation functions using the higher-twist approach. We show that the theoretical simulations could give nice descriptions of PHENIX data on η meson in both p+p and central Au + Au collisions at the RHIC, and also provide numerical predictions of η spectra in central Pb + Pb collisions with sNN=2.76 TeV at the LHC. The ratios of η/π0 in p+p and in central Au + Au collisions at 200 GeV are found to overlap in a wide pT region, which matches well the measured ratio η/π0 by PHENIX. We demonstrate that, at the asymptotic region when pT→∞ the ratios of η/π0 in both Au + Au and p+p are almost determined only by quark jets fragmentation and thus approach to the one in e+e− scattering; in addition, the almost identical gluon (quark) contribution fractions to η and to π result in a rather moderate variation of η/π0 distribution at intermediate and high pT region in A+A relative to that in p+p; while a slightly higher η/π0 at small pT in Au + Au can be observed due to larger suppression of gluon contribution fraction to π0 as compared to the one to η. The theoretical prediction for η/π0 at the LHC has also been presented.http://www.sciencedirect.com/science/article/pii/S0370269315007285 |
| spellingShingle | Wei Dai Xiao-Fang Chen Ben-Wei Zhang Enke Wang η meson production of high-energy nuclear collisions at NLO Physics Letters B |
| title | η meson production of high-energy nuclear collisions at NLO |
| title_full | η meson production of high-energy nuclear collisions at NLO |
| title_fullStr | η meson production of high-energy nuclear collisions at NLO |
| title_full_unstemmed | η meson production of high-energy nuclear collisions at NLO |
| title_short | η meson production of high-energy nuclear collisions at NLO |
| title_sort | η meson production of high energy nuclear collisions at nlo |
| url | http://www.sciencedirect.com/science/article/pii/S0370269315007285 |
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