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http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/4956| Title: | The production of isolated photons in PbPb and pp collisions at √sNN = 5.02 TeV |
| Authors: | CMS Collaboration Sirunyan, A. M. DUBE, SOURABH KANSAL, B. KAPOOR, A. KOTHEKAR, K. PANDEY, S. RANE, A. RASTOGI, A. SHARMA, SEEMA et al. Dept. of Physics |
| Keywords: | Hadron-Hadron scattering (experiments) Heavy-ion collision Photon production TOC-AUG-2020 2020 2020-AUG-WEEK2 |
| Issue Date: | Jul-2020 |
| Publisher: | Springer Nature |
| Citation: | Journal of High Energy Physics, 2020(7). |
| Abstract: | The transverse energy (EγT) spectra of photons isolated from other particles are measured using proton-proton (pp) and lead-lead (PbPb) collisions at the LHC at √sNN = 5.02 TeV with integrated luminosities of 27.4 pb−1 and 404 μb−1 for pp and PbPb data, respectively. The results are presented for photons with 25 <EγT< 200 GeV in the pseudorapidity range |η| < 1.44, and for different centrality intervals for PbPb collisions. Photon production in PbPb collisions is consistent with that in pp collisions scaled by the number of binary nucleon-nucleon collisions, demonstrating that photons do not interact with the quark-gluon plasma. Therefore, isolated photons can provide information about the initial energy of the associated parton in photon+jet measurements. The results are compared with predictions from the next-to-leading-order jetphox generator for different parton distribution functions (PDFs) and nuclear PDFs (nPDFs). The comparisons can help to constrain the nPDFs global fits. |
| URI: | http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/4956 https://doi.org/10.1007/JHEP07(2020)116 |
| ISSN: | 1126-6708 1029-8479 |
| Appears in Collections: | JOURNAL ARTICLES |
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