Options
Measurement of prompt D<inf>s</inf><sup>+</sup>-meson production and azimuthal anisotropy in Pb–Pb collisions at s<inf>NN</inf>=5.02TeV
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ISSN
03702693
Date Issued
2022-04-10
Author(s)
Acharya, S.
Adamová, D.
Adler, A.
Adolfsson, J.
Aglieri Rinella, G.
Agnello, M.
Agrawal, N.
Ahammed, Z.
Ahmad, S.
Ahn, S. U.
Ahuja, I.
Akbar, Z.
Akindinov, A.
Al-Turany, M.
Alam, S. N.
Aleksandrov, D.
Alessandro, B.
Alfanda, H. M.
Alfaro Molina, R.
Ali, B.
Ali, Y.
Alici, A.
Alizadehvandchali, N.
Alkin, A.
Alme, J.
Alt, T.
Altenkamper, L.
Altsybeev, I.
Anaam, M. N.
Andrei, C.
Andreou, D.
Andronic, A.
Angeletti, M.
Anguelov, V.
Antinori, F.
Antonioli, P.
Anuj, C.
Apadula, N.
Aphecetche, L.
Appelshäuser, H.
Arcelli, S.
Arnaldi, R.
Arsene, I. C.
Arslandok, M.
Augustinus, A.
Averbeck, R.
Aziz, S.
Azmi, M. D.
Badalà, A.
Baek, Y. W.
Bai, X.
Bailhache, R.
Bailung, Y.
Bala, R.
Balbino, A.
Baldisseri, A.
Balis, B.
Banerjee, D.
Barbera, R.
Barioglio, L.
Barlou, M.
Barnaföldi, G. G.
Barnby, L. S.
Barret, V.
Bartels, C.
Barth, K.
Bartsch, E.
Baruffaldi, F.
Bastid, N.
Basu, S.
Batigne, G.
Batyunya, B.
Bauri, D.
Bazo Alba, J. L.
Bearden, I. G.
Beattie, C.
Belikov, I.
Bell Hechavarria, A. D.C.
Bellini, F.
Bellwied, R.
Belokurova, S.
Belyaev, V.
Bencedi, G.
Beole, S.
Bercuci, A.
Berdnikov, Y.
Berdnikova, A.
Bergmann, L.
Besoiu, M. G.
Betev, L.
Bhaduri, P. P.
Bhasin, A.
Bhat, I. R.
Bhat, M. A.
Bhattacharjee, B.
Bhattacharya, P.
Bianchi, L.
Bianchi, N.
Bielčík, J.
Bielčíková, J.
Abstract
The production yield and angular anisotropy of prompt Ds+ mesons were measured as a function of transverse momentum (pT) in Pb–Pb collisions at a centre-of-mass energy per nucleon pair sNN=5.02TeV collected with the ALICE detector at the LHC. Ds+ mesons and their charge conjugates were reconstructed at midrapidity (|y|<0.5) from their hadronic decay channel Ds+→ϕπ+, with ϕ→K−K+, in the pT intervals 2<pT<50GeV/c and 2<pT<36GeV/c for the 0–10% and 30–50% centrality intervals. For pT>10GeV/c, the measured Ds+-meson nuclear modification factor RAA is consistent with the one of non-strange D mesons within uncertainties, while at lower pT a hint for a Ds+-meson RAA larger than that of non-strange D mesons is seen. The enhanced production of Ds+ relative to non-strange D mesons is also studied by comparing the pT-dependent Ds+/D0 production yield ratios in Pb–Pb and in pp collisions. The ratio measured in Pb–Pb collisions is found to be on average higher than that in pp collisions in the interval 2<pT<8GeV/c with a significance of 2.3σ and 2.4σ for the 0–10% and 30–50% centrality intervals. The azimuthal anisotropy coefficient v2 of prompt Ds+ mesons was measured in Pb–Pb collisions in the 30–50% centrality interval and is found to be compatible with that of non-strange D mesons. The main features of the measured RAA, Ds+/D0 ratio, and v2 as a function of pT are described by theoretical calculations of charm-quark transport in a hydrodynamically expanding quark–gluon plasma including hadronisation via charm-quark recombination with light quarks from the medium. The pT-integrated production yield of Ds+ mesons is compatible with the prediction of the statistical hadronisation model.
Volume
827
Publication link