Direct photon production in pp, p–Pb and Pb–Pb collisions measured with the ALICE experiment
We review recent ALICE results on direct photon production in pp, p–Pb and Pb–Pb collisions at LHC energies. In light systems, pp and p–Pb, no signal of direct photons at low pT < 3-5 GeV/c is observed within uncertainties, while at high pT our measurements are consistent with NLO pQCD calculatio...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2018-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://doi.org/10.1051/epjconf/201819105001 |
| _version_ | 1828921888478330880 |
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| author | Peresunko D. |
| author_facet | Peresunko D. |
| author_sort | Peresunko D. |
| collection | DOAJ |
| description | We review recent ALICE results on direct photon production in pp, p–Pb and Pb–Pb collisions at LHC energies. In light systems, pp and p–Pb, no signal of direct photons at low pT < 3-5 GeV/c is observed within uncertainties, while at high pT our measurements are consistent with NLO pQCD calculations. In central and mid-central Pb–Pb collisions a thermal photon contribution is observed at low pT < 3 - 4 GeV/c with slopes Teff = (304 ± 11stat ± 40syst) MeV and (407 ± 61stat ± 96syst) MeV respectively. A collective elliptic flow of direct photons is measured and appeared to be close to the decay photon flow. |
| first_indexed | 2024-12-13T22:12:10Z |
| format | Article |
| id | doaj.art-6c79eec0d4834029b895e104fb20cfd3 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-13T22:12:10Z |
| publishDate | 2018-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-6c79eec0d4834029b895e104fb20cfd32022-12-21T23:29:42ZengEDP SciencesEPJ Web of Conferences2100-014X2018-01-011910500110.1051/epjconf/201819105001epjconf_quarks2018_05001Direct photon production in pp, p–Pb and Pb–Pb collisions measured with the ALICE experimentPeresunko D.We review recent ALICE results on direct photon production in pp, p–Pb and Pb–Pb collisions at LHC energies. In light systems, pp and p–Pb, no signal of direct photons at low pT < 3-5 GeV/c is observed within uncertainties, while at high pT our measurements are consistent with NLO pQCD calculations. In central and mid-central Pb–Pb collisions a thermal photon contribution is observed at low pT < 3 - 4 GeV/c with slopes Teff = (304 ± 11stat ± 40syst) MeV and (407 ± 61stat ± 96syst) MeV respectively. A collective elliptic flow of direct photons is measured and appeared to be close to the decay photon flow.https://doi.org/10.1051/epjconf/201819105001 |
| spellingShingle | Peresunko D. Direct photon production in pp, p–Pb and Pb–Pb collisions measured with the ALICE experiment EPJ Web of Conferences |
| title | Direct photon production in pp, p–Pb and Pb–Pb collisions measured with the ALICE experiment |
| title_full | Direct photon production in pp, p–Pb and Pb–Pb collisions measured with the ALICE experiment |
| title_fullStr | Direct photon production in pp, p–Pb and Pb–Pb collisions measured with the ALICE experiment |
| title_full_unstemmed | Direct photon production in pp, p–Pb and Pb–Pb collisions measured with the ALICE experiment |
| title_short | Direct photon production in pp, p–Pb and Pb–Pb collisions measured with the ALICE experiment |
| title_sort | direct photon production in pp p pb and pb pb collisions measured with the alice experiment |
| url | https://doi.org/10.1051/epjconf/201819105001 |
| work_keys_str_mv | AT peresunkod directphotonproductioninppppbandpbpbcollisionsmeasuredwiththealiceexperiment |