Measurement of D-meson production versus multiplicity in p-Pb collisions at √sNN=5.02 TeV
Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahn, Sang Un; Aimo, Ilaria; Akindinov, Alexander; Alme, Johan; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Altinpinar, Sedat; Djuvsland, Øystein; Haaland, Øystein Senneset; Huang, Meidana; Lønne, Per-Ivar; Nystrand, Joakim; Rehman, Attiq ur; Røhrich, Dieter; Tambave, Ganesh Jagannath; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Zhang, Hui; Zhou, Zhuo; Zhu, Hongsheng; Arsene, Ionut Christian; Bätzing, Paul Christoph; Dordic, Olja; Lindal, Svein; Mahmood, Sohail Musa; Milosevic, Jovan; Qvigstad, Henrik; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Langøy, Rune; Lien, Jørgen; Alam, Sk Noor; Aleksandrov, Dimitry; Alessandro, Bruno; Alexandre, Didier; Alfaro Molina, José Rubén; Alici, Andrea; ALICE, Collaboration
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Date
2016Metadata
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Original version
Journal of High Energy Physics (JHEP). 2016, 2016:78 (8), 1-44. 10.1007/JHEP08(2016)078Abstract
The measurement of prompt D-meson production as a function of multiplicity in p-Pb collisions at √sNN = 5.02 TeV with the ALICE detector at the LHC is reported. D0, D+ and D_+ mesons are reconstructed via their hadronic decay channels in the centre-of-mass rapidity range -0.96 < ycms < 0.04 and transverse momentum interval 1 < pT < 24 GeV= c. The multiplicity dependence of D-meson production is examined by either comparing yields in p-Pb collisions in different event classes, selected based on the multiplicity of produced particles or zero-degree energy, with those in pp collisions, scaled by the number of binary nucleon-nucleon collisions (nuclear modification factor); as well as by evaluating the per-event yields in p{Pb collisions in different multiplicity intervals normalised to the multiplicity-integrated ones (relative yields). The nuclear modification factors for D0, D+ and D_+ are consistent with one another. The D-meson nuclear modifcation factors as a function of the zero-degree energy are consistent with unity within uncertainties in the measured pT regions and event classes. The relative D-meson yields, calculated in various pT intervals, increase as a function of the charged-particle multiplicity. The results are compared with the quivalent pp measurements at √s = 7 TeV as well as with EPOS 3 calculations.