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Anisotropic flow of identified particles in Pb-Pb collisions at √sNN=5.02 TeV

  • Author(s): Acharya, S;
  • Acosta, FT;
  • Adamová, D;
  • Adolfsson, J;
  • Aggarwal, MM;
  • Aglieri Rinella, G;
  • Agnello, M;
  • Agrawal, N;
  • Ahammed, Z;
  • Ahn, SU;
  • Aiola, S;
  • Akindinov, A;
  • Al-Turany, M;
  • Alam, SN;
  • Albuquerque, DSD;
  • Aleksandrov, D;
  • Alessandro, B;
  • Alfaro Molina, R;
  • Ali, Y;
  • Alici, A;
  • Alkin, A;
  • Alme, J;
  • Alt, T;
  • Altenkamper, L;
  • Altsybeev, I;
  • Anaam, MN;
  • Andrei, C;
  • Andreou, D;
  • Andrews, HA;
  • Andronic, A;
  • Angeletti, M;
  • Anguelov, V;
  • Anson, C;
  • Antičić, T;
  • Antinori, F;
  • Antonioli, P;
  • Anwar, R;
  • Apadula, N;
  • 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;
  • Ball, M;
  • Baral, RC;
  • Barbano, AM;
  • Barbera, R;
  • Barile, F;
  • Barioglio, L;
  • Barnaföldi, GG;
  • Barnby, LS;
  • Barret, V;
  • Bartalini, P;
  • Barth, K;
  • Bartsch, E;
  • Bastid, N;
  • Basu, S;
  • Batigne, G;
  • Batyunya, B;
  • Batzing, PC;
  • Bazo Alba, JL;
  • Bearden, IG;
  • Beck, H;
  • Bedda, C;
  • Behera, NK;
  • Belikov, I;
  • Bellini, F;
  • Bello Martinez, H;
  • Bellwied, R;
  • Beltran, LGE;
  • Belyaev, V;
  • Bencedi, G;
  • Beole, S;
  • Bercuci, A;
  • Berdnikov, Y;
  • Berenyi, D;
  • Bertens, RA;
  • Berzano, D;
  • Betev, L;
  • Bhaduri, PP;
  • Bhasin, A;
  • Bhat, IR;
  • Bhatt, H;
  • Bhattacharjee, B;
  • Bhom, J;
  • Bianchi, A;
  • Bianchi, L;
  • Bianchi, N
  • et al.
Abstract

The elliptic (v2), triangular (v3), and quadrangular (v4) flow coefficients of π±, K±, p+p¯,Λ+Λ¯,KS0, and the ϕ-meson are measured in Pb-Pb collisions at sNN=5.02 TeV. Results obtained with the scalar product method are reported for the rapidity range |y| < 0.5 as a function of transverse momentum, pT, at different collision centrality intervals between 0–70%, including ultra-central (0–1%) collisions for π±, K±, and p + p ¯. For pT< 3 GeV/c, the flow coefficients exhibit a particle mass dependence. At intermediate transverse momenta (3 < pT < 8–10 GeV/c), particles show an approximate grouping according to their type (i.e., mesons and baryons). The ϕ-meson v2, which tests both particle mass dependence and type scaling, follows p + p ¯ v2 at low pT and π±v2 at intermediate pT. The evolution of the shape of vn(pT) as a function of centrality and harmonic number n is studied for the various particle species. Flow coefficients of π±, K±, and p + p ¯ for pT < 3 GeV/c are compared to iEBE-VISHNU and MUSIC hydrodynamical calculations coupled to a hadronic cascade model (UrQMD). The iEBE-VISHNU calculations describe the results fairly well for pT < 2.5 GeV/c, while MUSIC calculations reproduce the measurements for pT < 1 GeV/c. A comparison to vn coefficients measured in Pb-Pb collisions at sNN=2.76 TeV is also provided.[Figure not available: see fulltext.].

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