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Transverse momentum dependence of D-meson production in Pb-Pb collisions at √sNN= 2.76 TeV

  • Author(s): The ALICE collaboration
  • Adam, J
  • Adamová, D
  • Aggarwal, MM
  • Aglieri Rinella, G
  • Agnello, M
  • Agrawal, N
  • Ahammed, Z
  • Ahn, SU
  • Aiola, S
  • Akindinov, A
  • Alam, SN
  • Aleksandrov, D
  • Alessandro, B
  • Alexandre, D
  • Alfaro Molina, R
  • Alici, A
  • Alkin, A
  • Almaraz, JRM
  • Alme, J
  • Alt, T
  • Altinpinar, S
  • Altsybeev, I
  • Alves Garcia Prado, C
  • Andrei, C
  • Andronic, A
  • Anguelov, V
  • Anielski, J
  • Antičić, T
  • Antinori, F
  • Antonioli, P
  • Aphecetche, L
  • Appelshäuser, H
  • Arcelli, S
  • Arnaldi, R
  • Arnold, OW
  • Arsene, IC
  • Arslandok, M
  • Audurier, B
  • Augustinus, A
  • Averbeck, R
  • Azmi, MD
  • Badalà, A
  • Baek, YW
  • Bagnasco, S
  • Bailhache, R
  • Bala, R
  • Baldisseri, A
  • Baral, RC
  • Barbano, AM
  • Barbera, R
  • Barile, F
  • Barnaföldi, GG
  • Barnby, LS
  • Barret, V
  • Bartalini, P
  • Barth, K
  • Bartke, J
  • Bartsch, E
  • Basile, M
  • Bastid, N
  • Basu, S
  • Bathen, B
  • Batigne, G
  • Batista Camejo, A
  • Batyunya, B
  • Batzing, PC
  • Bearden, IG
  • Beck, H
  • Bedda, C
  • Behera, NK
  • Belikov, I
  • Bellini, F
  • Bello Martinez, H
  • Bellwied, R
  • Belmont, R
  • Belmont-Moreno, E
  • Belyaev, V
  • Bencedi, G
  • Beole, S
  • Berceanu, I
  • Bercuci, A
  • Berdnikov, Y
  • Berenyi, D
  • Bertens, RA
  • Berzano, D
  • Betev, L
  • Bhasin, A
  • Bhat, IR
  • Bhati, AK
  • Bhattacharjee, B
  • Bhom, J
  • Bianchi, L
  • Bianchi, N
  • Bianchin, C
  • Bielčík, J
  • et al.
Abstract

© 2016, The Author(s). The production of prompt charmed mesons D0, D+and D∗+, and their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at the centre-of-mass energy per nucleon pair, (Formula presented.) , of 2.76 TeV. The production yields for rapidity |y| < 0.5 are presented as a function of transverse momentum, pT, in the interval 1–36 GeV/c for the centrality class 0–10% and in the interval 1–16 GeV/c for the centrality class 30–50%. The nuclear modification factor RAAwas computed using a proton-proton reference at (Formula presented.) TeV, based on measurements at (Formula presented.) TeV and on theoretical calculations. A maximum suppression by a factor of 5-6 with respect to binary-scaled pp yields is observed for the most central collisions at pTof about 10 GeV/c. A suppression by a factor of about 2-3 persists at the highest pTcovered by the measurements. At low pT(1-3 GeV/c), the RAAhas large uncertainties that span the range 0.35 (factor of about 3 suppression) to 1 (no suppression). In all pTintervals, the RAAis larger in the 30-50% centrality class compared to central collisions. The D-meson RAAis also compared with that of charged pions and, at large pT, charged hadrons, and with model calculations.

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