Measurement of electrons from semileptonic heavy-flavour hadron decays at midrapidity in pp and Pb-Pb collisions at √ s(NN)=5.02 TeV

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Acharya, S, Adamova, D, Adhya, SP, Adler, A, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z et al (show 1022 more authors) , Ahmad, S, Ahn, SU, Akindinov, A, Al-Turany, M, Alam, SN, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Alfanda, HM, Alfaro Molina, R, Ali, B, Ali, Y, Alici, A, Alkin, A, Alme, J, Alt, T, Altenkamper, L, Altsybeev, I, Anaam, MN, Andrei, C, Andreou, D, Andrews, HA, Andronic, A, Angeletti, M, Anguelov, V, Anson, C, Anticic, T, Antinori, F, Antonioli, P, Anwar, R, Apadula, N, Aphecetche, L, Appelshaeuser, H, Arcelli, S, Arnaldi, R, Arratia, M, Arsene, IC, Arslandok, M, Augustinus, A, Averbeck, R, Aziz, S, Azmi, MD, Badala, A, Baek, YW, Bagnasco, S, Bai, X, Bailhache, R, Bala, R, Baldisseri, A, Ball, M, Balouza, S, Baral, RC, Barbera, R, Barioglio, L, Barnafoldi, GG, Barnby, LS, Barret, V, Bartalini, P, Barth, K, Bartsch, E, Baruffaldi, F, Bastid, N, Basu, S, Batigne, G, Batyunya, B, Batzing, PC, Bauri, D, Bazo Alba, JL, Bearden, 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W, Chapeland, S, Chartier, M ORCID: 0000-0003-0578-5567, Chattopadhyay, S, Chauvin, A, Cheshkov, C, Cheynis, B, Barroso, V Chibante, Chinellato, DD, Cho, S, Chochula, P, Chowdhury, T, Christakoglou, P, Christensen, CH, Christiansen, P, Chujo, T, Cicalo, C, Cifarelli, L, Cindolo, F, Cleymans, J, Colamaria, F, Colella, D, Collu, A, Colocci, M, Concas, M, Balbastre, G Conesa, del Valle, Z Conesa, Contin, G, Contreras, JG, Cormier, TM, Morales, Y Corrales, Cortese, P, Cosentino, MR, Costa, F, Costanza, S, Crkovska, J, Crochet, P, Cuautle, E, Cunqueiro, L, Dabrowski, D, Dahms, T, Dainese, A, Damas, FPA, Dani, S, Danisch, MC, Danu, A, Das, D, Das, I, Das, P, Das, S, Dash, A, Dash, S, Dashi, A, De, S, De Caro, A, de Cataldo, G, de Conti, C, de Cuveland, J, De Falco, A, De Gruttola, D, De Marco, N, De Pasquale, S, De Souza, RD, Deb, S, Degenhardt, HF, Deja, KR, Deloff, A, Delsanto, S, Devetak, D, Dhankher, P, Di Bari, D, Di Mauro, A, Diaz, RA, Dietel, T, Dillenseger, P, Ding, Y, Divia, R, Djuvsland, O, Dmitrieva, U, Dobrin, A, Doenigus, B, Dordic, O, Dubey, AK, Dubla, A, Dudi, S, Dukhishyam, M, Dupieux, P, Ehlers, RJ, Elia, D, Engel, H, Epple, E, Erazmus, B, Erhardt, F, Erokhin, A, Ersdal, MR, Espagnon, B, Eulisse, G, Eum, J, Evans, D, Evdokimov, S, Fabbietti, L, Faggin, M, Faivre, J, Fantoni, A, Fasel, M, Fecchio, P, Feliciello, A, Feofilov, G, Fernandez Tellez, A, Ferrero, A, Ferretti, A, Festanti, A, Feuillard, VJG, Figiel, J, Filchagin, S, Finogeev, D, Fionda, FM, Fiorenza, G, Flor, F, Foertsch, S, Foka, P, Fokin, S, Fragiacomo, E, Frankenfeld, U, Fronze, GG, Fuchs, U, Furget, C, Furs, A, Girard, M Fusco, Gaardhoje, JJ, Gagliardi, M, Gago, AM, Gal, A, Galvan, CD, Ganoti, P, Garabatos, C, Garcia-Solis, E, Garg, K, Gargiulo, C, Garibli, A, Garner, K, Gasik, P, Gauger, EF, Ducati, MB Gay, Germain, M, Ghosh, J, Ghosh, P, Ghosh, SK, Gianotti, P, Giubellino, P, Giubilato, P, Glaessel, P, Gomez Coral, DM, Ramirez, A Gomez, Gonzalez, V, Gonzalez-Zamora, P, Gorbunov, S, 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midrapidity in pp and Pb-Pb collisions at √ s(NN)=5.02 TeV Physics Letters B: Nuclear Physics and Particle Physics, 804. 135377-. ISSN 0370-2693, 1873-2445

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Abstract

The differential invariant yield as a function of transverse momentum (p<inf>T</inf>) of electrons from semileptonic heavy-flavour hadron decays was measured at midrapidity in central (0–10%), semi-central (30–50%) and peripheral (60–80%) lead–lead (Pb–Pb) collisions at s<inf>NN</inf>=5.02 TeV in the p<inf>T</inf> intervals 0.5–26 GeV/c (0–10% and 30–50%) and 0.5–10 GeV/c (60–80%). The production cross section in proton–proton (pp) collisions at s=5.02 TeV was measured as well in 0.5<p<inf>T</inf><10 GeV/c and it lies close to the upper band of perturbative QCD calculation uncertainties up to p<inf>T</inf>=5 GeV/c and close to the mean value for larger p<inf>T</inf>. The modification of the electron yield with respect to what is expected for an incoherent superposition of nucleon–nucleon collisions is evaluated by measuring the nuclear modification factor R<inf>AA</inf>. The measurement of the R<inf>AA</inf> in different centrality classes allows in-medium energy loss of charm and beauty quarks to be investigated. The R<inf>AA</inf> shows a suppression with respect to unity at intermediate p<inf>T</inf>, which increases while moving towards more central collisions. Moreover, the measured R<inf>AA</inf> is sensitive to the modification of the parton distribution functions (PDF) in nuclei, like nuclear shadowing, which causes a suppression of the heavy-quark production at low p<inf>T</inf> in heavy-ion collisions at LHC.

Item Type:	Article
Uncontrolled Keywords:	5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 5110 Synchrotrons and Accelerators, 51 Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	26 Aug 2020 10:44
Last Modified:	23 May 2026 02:32
DOI:	10.1016/j.physletb.2020.135377
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3098779
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