D-meson production in \(p\)–Pb collisions at \(\sqrt{s_{\rm NN}}=5.02\) TeV and in \(pp\) collisions at \(\sqrt{s}=7\) TeV
Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, Shafiq F.; Ahn, Sang Un; Aiola, Salvatore; Alme, Johan; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Altinpinar, Sedat; Djuvsland, Øystein; 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 André; Akindinov, Alexander; Alam, Sk Noor; De Albuquerque, Danilo Silva; Aleksandrov, Dimitry; Alessandro, Bruno; Alexandre, Didier; Alfaro Molina, José Rubén; Alici, Andrea; ALICE, Collaboration
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2016-11Metadata
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Adam J, Adamová D, Aggarwal MM, Aglieri Rinella G, Agnello M, Agrawal N, Ahammed Z, Ahmad SF, Ahn SU, Aiola S, Alme J, Helstrup H, Hetland KF, Kileng B, Altinpinar S, Djuvsland Ø, Lønne P, Nystrand J, Rehman Au, Røhrich D, Tambave GJ, Ullaland K, Velure A, Wagner B, Zhang H, Zhou Z, Zhu H, Arsene IC, Bätzing P, Dordic O, Lindal S, Mahmood SM, Milosevic J, Qvigstad H, Richter M, Røed K, Skaali TB, Tveter TS, Wikne JC, Zhao C, Langøy R, Lien JA, Akindinov A, Alam SN, De Albuquerque DS, Aleksandrov D, Alessandro B, Alexandre D, Alfaro Molina JR, Alici A, ALICE C. D-meson production in p-Pb collisions at √sNN = 5.02 TeV and in pp collisions at √s = 7 TeV. Physical Review C. Nuclear Physics. 2016;94:054908 https://doi.org/10.1103/physrevc.94.054908Abstract
The production cross sections of the prompt charmed mesons D\)^0\), D\)^+\), D\)^{*+}\) and D\(_{\rm s}^+\) were measured at mid-rapidity in p-Pb collisions at a centre-of-mass energy per nucleon pair \(\sqrt{s_{\rm NN}}=5.02\) TeV with the ALICE detector at the LHC. D mesons were reconstruct ed from their decays D\)^0\rightarrow {\rm K}^-\pi^+\), D\)^+\rightarrow {\rm K}^-\pi^+\pi^+\), D\)^{*+}\rightarrow {\rm D}^0\pi^+\), D\(_s^+\rightarrow\phi\pi^+\rightarrow {\rm K}^-{\rm K}^+\pi^+\), and their charge conjugates. The \(p_{\rm T}\)-differential production cross sections were measured at mid-rapidity in the transverse momentum interval \(1<p_{\rm T}<24\) GeV/\(c\) for D\)^0\), D\)^+\) and D\)^{*+}\) mesons and in \(2<p_{\rm T}<12\) GeV/\(c\) for \(D_s^+\) mesons, using an analysis method based on the selection of decay topologies displaced from the interaction vertex. The production cross sections of the D\)^0\), D\)^+\) and D\)^{*+}\) mesons were also measured in three \(p_{\rm T}\) intervals as a function of the rapidity \(y_{\rm cms}\) in the centre-of-mass system in \(-1.26<y_{\rm cms}<0.34\), In addition, the prompt D\)^0\) production cross section was measured in pp collisions at \(\sqrt{s}=7\) TeV and p-Pb collisions at \(\sqrt{s_{\rm NN}}=5.02\) TeV down to \(p_{\rm T}=0\) using an analysis technique that is based on the estimation and subtraction of the combinatorial background, without reconstruction of the D\)^0\) decay vertex. The nuclear modification factor \(R_{\rm pPb}(p_{\rm T})\), defined as the ratio of the \(p_{\rm T}\)-differential D-meson cross section in p-Pb collisions and that in pp collisions scaled by the mass number of the Pb nucleus, was calculated for the four D-meson species and found to be compatible with unity within experimental uncertainties. The results are compared to theoretical calculations that include cold-nuclear-matter effects and to transport model calculations incorporating the interactions of charm quarks with an expanding deconfined medium.