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http://bura.brunel.ac.uk/handle/2438/21330
Title: | The production of isolated photons in PbPb and pp collisions at √sNN = 5.02 TeV |
Authors: | Sirunyan, AM Tumasyan, A Adam, W Ambrogi, F Bergauer, T Dragicevic, M Erö, J Escalante Del Valle, A Flechl, M Frühwirth, R Jeitler, M Krammer, N Krätschmer, I Liko, D Madlener, T Mikulec, I Rad, N Schieck, J Schöfbeck, R Spanring, M Waltenberger, W Wulz, CE Zarucki, M Drugakov, V Mossolov, V Suarez Gonzalez, J Darwish, MR De Wolf, EA Di Croce, D Janssen, X Kello, T Lelek, A Pieters, M Rejeb Sfar, H Van Haevermaet, H Van Mechelen, P Van Putte, S Van Remortel, N Blekman, F Bols, ES Chhibra, SS D’Hondt, J De Clercq, J Lontkovskyi, D Lowette, S Marchesini, I Moortgat, S Python, Q Tavernier, S Van Doninck, W Van Mulders, P Beghin, D Bilin, B Clerbaux, B De Lentdecker, G Delannoy, H Dorney, B Favart, L Grebenyuk, A Kalsi, AK Moureaux, L Popov, A Postiau, N Starling, E Thomas, L Vander Velde, C Vanlaer, P Vannerom, D Cornelis, T Dobur, D Khvastunov, I Niedziela, M Roskas, C Skovpen, K Tytgat, M Verbeke, W Vermassen, B Vit, M Bruno, G Caputo, C David, P Delaere, C Delcourt, M Giammanco, A Lemaitre, V Prisciandaro, J Saggio, A Vischia, P Zobec, J Alves, GA Correia Silva, G Hensel, C Moraes, A Belchior Batista Das Chagas, E Carvalho, W Chinellato, J Coelho, E Da Costa, EM Da Silveira, GG De Jesus Damiao, D |
Keywords: | Hadron-Hadron scattering (experiments);Heavy-ion collision;Photon production |
Issue Date: | 17-Jul-2020 |
Publisher: | Springer Verlag |
Citation: | Journal of High Energy Physics, 2020, 2020 (7) |
Abstract: | © 2020, The Author(s). The transverse energy (ETγ) 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 <ETγ< 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. [Figure not available: see fulltext.] |
URI: | http://bura.brunel.ac.uk/handle/2438/21330 |
DOI: | http://dx.doi.org/10.1007/JHEP07(2020)116 |
ISSN: | 1126-6708 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers |
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