Measurement of prompt D$^{0}$, D$^{+}$, D$^{+}$, and $ {\mathrm{D}}_{\mathrm{S}}^{+} $ production in p–Pb collisions at $ \sqrt{{\mathrm{s}}_{\mathrm{NN}}} $ = 5.02 TeV

• Published in: The journal of high energy physics 2019, Vol.12
• Main Authors: Acharya, Shreyasi, Adamova, Dagmar, Adhya, Souvik Priyam, Adler, Alexander, Adolfsson, Jonatan, Aggarwal, Madan Mohan, Aglieri Rinella, Gianluca, Agnello, Michelangelo, Agrawal, Neelima, Ahammed, Zubayer, Ahmad, Shakeel, Ahn, Sang Un, Akindinov, Alexander, Al-Turany, Mohammad, Alam, Sk Noor, Silva de Albuquerque, Danilo, Aleksandrov, Dmitry, Alessandro, Bruno, Alfanda, Haidar Mas'Ud, Alfaro Molina, Jose Ruben, Ali, Bushra, Ali, Yasir, Alici, Andrea, Alkin, Anton, Alme, Johan, Alt, Torsten, Altenkamper, Lucas, Altsybeev, Igor, Anaam, Mustafa Naji, Andrei, Cristian, Andreou, Dimitra, Andrews, Harry Arthur, Andronic, Anton, Angeletti, Massimo, Anguelov, Venelin, Anson, Christopher Daniel, Anticic, Tome, Antinori, Federico, Antonioli, Pietro, Anwar, Rafay, Apadula, Nicole, Aphecetche, Laurent Bernard, Appelshaeuser, Harald, Arcelli, Silvia, Arnaldi, Roberta, Arratia Munoz, Miguel Ignacio, Arsene, Ionut Cristian, Arslandok, Mesut, Augustinus, Andre, Averbeck, Ralf Peter, Aziz, Sizar, Azmi, Mohd Danish, Badala, Angela, Baek, Yongwook, Bagnasco, Stefano, Bai, Xiaozhi, Bailhache, Raphaelle Marie, Bala, Renu, Baldisseri, Alberto, Ball, Markus, Balouza, Samah, Baral, Rama Chandra, Barbera, Roberto, Barioglio, Luca, Barnafoldi, Gergely Gabor, Barnby, Lee Stuart, Ramillien Barret, Valerie, Bartalini, Paolo, Barth, Klaus, Bartsch, Esther, Baruffaldi, Filippo, Bastid, Nicole, Basu, Sumit, Batigne, Guillaume, Batyunya, Boris, Batzing, Paul Christoph, Bauri, Dibakar, Bazo Alba, Jose Luis, Bearden, Ian Gardner, Bedda, Cristina, Behera, Nirbhay Kumar, Belikov, Iouri, Bellini, Francesca, Bellwied, Rene, Belyaev, Vladimir, Bencedi, Gyula, Beole, Stefania, Bercuci, Alexandru, Berdnikov, Yaroslav, Berenyi, Daniel, Bertens, Redmer Alexander, Berzano, Dario, Besoiu, Mihaela Gabriela, Betev, Latchezar, Bhasin, Anju, Bhat, Inayat Rasool, Bhat, Mohammad Asif, Bhatt, Himani, Bhattacharjee, Buddhadeb, Bianchi, Antonio
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Nuclear Experiment; Physics
• ISSN: 1126-6708; 1029-8479
• DOI: 10.1007/JHEP12(2019)092

The measurement of the production of prompt D$^{0}$, D$^{+}$, D$^{*+}$, and $ {\mathrm{D}}_{\mathrm{S}}^{+} $ mesons in proton–lead (p–Pb) collisions at the centre-of-mass energy per nucleon pair of $ \sqrt{s_{\mathrm{NN}}} $ = 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 < y$_{cms}$< 0.04) as a function of transverse momentum (p$_{T}$) in the intervals 0 < p$_{T}$< 36 GeV/c for D$^{0}$, 1 < p$_{T}$< 36 GeV/c for D$^{+}$ and D$^{*+}$, and 2 < p$_{T}$< 24 GeV/c for D$^{+}$ mesons. For each species, the nuclear modification factor R$_{pPb}$ is calculated as a function of p$_{T}$ using a proton-proton (pp) ref- erence measured at the same collision energy. The results are compatible with unity in the whole p$_{T}$ range. The average of the non-strange D mesons R$_{pPb}$ is compared with theoretical model predictions that include initial-state effects and parton transport model predictions. The p$_{T}$ dependence of the D$^{0}$, D$^{+}$, and D$^{*+}$ nuclear modification factors is also reported in the interval 1 < p$_{T}$< 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 p$_{T}$-differential cross sections of D$^{0}$, D$^{+}$, D$^{*+}$, and $ {\mathrm{D}}_{\mathrm{S}}^{+} $ mesons are also reported. The $ {\mathrm{D}}_{\mathrm{S}}^{+} $ and D$^{+}$ yields are compared as a function of the charged-particle multiplicity for several p$_{T}$ intervals. No modification in the relative abundances of the four species is observed with respect to pp collisions within the statistical and systematic uncertainties.