{"title":"在 $\\sqrt{s}$ = 13 TeV 的 pp 对撞中测量包容性孤立光子产生截面","authors":"ALICE Collaboration","doi":"arxiv-2407.01165","DOIUrl":null,"url":null,"abstract":"The production cross section of inclusive isolated photons has been measured\nby the ALICE experiment at the CERN LHC in pp collisions at centre-of-momentum\nenergy of $\\sqrt{s}=13$ TeV collected during the LHC Run 2 data-taking period.\nThe measurement is performed by combining the measurements of the\nelectromagnetic calorimeter EMCal and the central tracking detectors ITS and\nTPC, covering a pseudorapidity range of $|\\eta^{\\gamma}|<0.67$ and a transverse\nmomentum range of $7<p_{\\rm T}^{\\gamma}<200$ GeV/$c$. The result extends to\nlower $p_{\\rm T}^{\\gamma}$ and $x_{\\rm T}^{\\gamma} = 2p_{\\rm\nT}^{\\gamma}/\\sqrt{s}$ ranges, the lowest $x_{\\rm T}^{\\gamma}$ of any isolated\nphoton measurements to date, extending significantly those measured by the\nATLAS and CMS experiments towards lower $p_{\\rm T}^{\\gamma}$ at the same\ncollision energy with a small overlap between the measurements. The measurement\nis compared with next-to-leading order perturbative QCD calculations and the\nresults from the ATLAS and CMS experiments as well as with measurements at\nother collision energies. The measurement and theory prediction are in\nagreement with each other within the experimental and theoretical\nuncertainties.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":"49 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Measurement of the inclusive isolated-photon production cross section in pp collisions at $\\\\sqrt{s}$ = 13 TeV\",\"authors\":\"ALICE Collaboration\",\"doi\":\"arxiv-2407.01165\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The production cross section of inclusive isolated photons has been measured\\nby the ALICE experiment at the CERN LHC in pp collisions at centre-of-momentum\\nenergy of $\\\\sqrt{s}=13$ TeV collected during the LHC Run 2 data-taking period.\\nThe measurement is performed by combining the measurements of the\\nelectromagnetic calorimeter EMCal and the central tracking detectors ITS and\\nTPC, covering a pseudorapidity range of $|\\\\eta^{\\\\gamma}|<0.67$ and a transverse\\nmomentum range of $7<p_{\\\\rm T}^{\\\\gamma}<200$ GeV/$c$. The result extends to\\nlower $p_{\\\\rm T}^{\\\\gamma}$ and $x_{\\\\rm T}^{\\\\gamma} = 2p_{\\\\rm\\nT}^{\\\\gamma}/\\\\sqrt{s}$ ranges, the lowest $x_{\\\\rm T}^{\\\\gamma}$ of any isolated\\nphoton measurements to date, extending significantly those measured by the\\nATLAS and CMS experiments towards lower $p_{\\\\rm T}^{\\\\gamma}$ at the same\\ncollision energy with a small overlap between the measurements. The measurement\\nis compared with next-to-leading order perturbative QCD calculations and the\\nresults from the ATLAS and CMS experiments as well as with measurements at\\nother collision energies. The measurement and theory prediction are in\\nagreement with each other within the experimental and theoretical\\nuncertainties.\",\"PeriodicalId\":501206,\"journal\":{\"name\":\"arXiv - PHYS - Nuclear Experiment\",\"volume\":\"49 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - PHYS - Nuclear Experiment\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2407.01165\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Nuclear Experiment","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2407.01165","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Measurement of the inclusive isolated-photon production cross section in pp collisions at $\sqrt{s}$ = 13 TeV
The production cross section of inclusive isolated photons has been measured
by the ALICE experiment at the CERN LHC in pp collisions at centre-of-momentum
energy of $\sqrt{s}=13$ TeV collected during the LHC Run 2 data-taking period.
The measurement is performed by combining the measurements of the
electromagnetic calorimeter EMCal and the central tracking detectors ITS and
TPC, covering a pseudorapidity range of $|\eta^{\gamma}|<0.67$ and a transverse
momentum range of $7