Measurement of prompt D0, D+, D+, and D+S production in p–Pb collisions at √sNN = 5.02 TeV

• Published in: The journal of high energy physics
• Main Authors: Acharya, Shreyasi, Adamová, Dagmar, Adhya, Souvik Priyam, Adler, Clemens, Adolfsson, Jonatan, Aggarwal, Madan M, Aglieri Rinella, Gianluca, Agnello, Michelangelo, Agrawal, Nikita, Ahammed, Zubayer, Alme, Johan, Altenkaemper, Lucas, Djuvsland, Øystein, Ersdal, Magnus Rentsch, Fionda, Fiorella Maria Celeste, Grøttvik, Ola Slettevoll, Lofnes, Ingrid Mckibben, Nystrand, Joakim, Rehman, Attiq ur, Røhrich, Dieter, Tambave, Ganesh Jagannath, Ullaland, Kjetil, Wagner, Boris, Yang, Shiming, Yuan, Shiming, Zhou, Zhuo, Arsene, Ionut Cristian, Bätzing, Paul Christoph, Dordic, Olja, Lardeux, Antoine Xavier, Lindal, Svein, Mahmood, Sohail Musa, Malik, Qasim Waheed, Richter, Matthias, Røed, Ketil, Skaali, Toralf Bernhard, Tveter, Trine Spedstad, Wikne, Jon Christopher, Zhao, Chengxin, Helstrup, Håvard, Hetland, Kristin Fanebust, Kileng, Bjarte, Nesbø, Simon Voigt, Storetvedt, Maksim Melnik, Langøy, Rune, Lien, Jørgen André, Ahmad, Shafiq F, Ahn, Sang Un, Akindinov, Alexander, Al-Turany, Mohammed, ALICE, Collaboration
• Format: Journal Article
• Language: Norwegian
• Published: 2019
• ISSN: 1126-6708; 1029-8479

The measurement of the production of prompt D0 , D+, D∗+, and D+ s mesons in proton–lead (p–Pb) collisions at the centre-of-mass energy per nucleon pair of √ sNN = 5.02 TeV, with an integrated luminosity of 292 ± 11 µb −1 , are reported. Differential production cross sections are measured at mid-rapidity (−0.96 < ycms < 0.04) as a function of transverse momentum (pT) in the intervals 0 < pT < 36 GeV/c for D0 , 1 < pT < 36 GeV/c for D+ and D∗+, and 2 < pT < 24 GeV/c for D+ s mesons. For each species, the nuclear modification factor RpPb is calculated as a function of pT using a proton-proton (pp) reference measured at the same collision energy. The results are compatible with unity in the whole pT range. The average of the non-strange D mesons RpPb is compared with theoretical model predictions that include initial-state effects and parton transport model predictions. The pT dependence of the D0 , D+, and D∗+ nuclear modification factors is also reported in the interval 1 < pT < 36 GeV/c as a function of the collision centrality, and the central-to-peripheral ratios are computed from the D-meson yields measured in different centrality classes. The results are further compared with charged-particle measurements and a similar trend is observed in all the centrality classes. The ratios of the pT-differential cross sections of D0 , D+, D∗+, and D+ s mesons are also reported. The D+ s and D+ yields are compared as a function of the charged-particle multiplicity for several pT intervals. No modification in the relative abundances of the four species is observed with respect to pp collisions within the statistical and systematic uncertainties.