Elliptic flow of identified hadrons in small collisional systems measured with ALICE

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초록

Recent observations of long-range multi-particle azimuthal correlations in p-Pb and high multiplicity pp collisions provided new insights into collision dynamics and opened a possibility to study collective effects in these small systems. New measurements of p(T)-differential elliptic flow (v(2)) coefficient for inclusive charged hadrons as well as a variety of identified particle species in p-Pb collisions at root s(NN) = 5.02 TeV are presented. The data was collected by ALICE during the LHC Run 2 data taking. Besides high precision measurements of v(2)(P-T) for pi(+/-), K-+/- and p((p) over bar), the first results for K-s(0), Lambda((Lambda) over bar) and phi are shown. In order to eliminate non-flow contamination, a pseudorapidity separation between correlated particles is applied as well as subtraction of remaining non-flow estimate based on a measurement of minimum-bias pp collisions at root s = 13 TeV. Moreover, the reported characteristic mass ordering and approximate number of constituent quarks (NCQ) and transverse kinetic energy (KET) scaling of v(2) allow to test various theoretical models, constrain the initial conditions, and probe the origin of collective behavior in small collision systems.

키워드

anisotropic azimuthal correlationselliptic flowp(T)-differentialidentified particlessmall systemsp-PbALICELHC
제목
Elliptic flow of identified hadrons in small collisional systems measured with ALICE
저자
Pacik, VojtechAcharya, S.Acosta, F. T.Adamova, D.Adolfsson, J.Aggarwal, M. M.Rinella, G. AglieriAgnello, M.Agrawal, N.Ahammed, Z.Ahn, S. U.Aiola, S.Akindinov, A.Al-Turany, M.Alam, S. N.Albuquerque, D. S. D.Aleksandrov, D.Alessandro, B.Alfaro Molina, R.Ali, Y.Alici, A.Alkin, A.Alme, J.Alt, T.Altenkamper, L.Altsybeev, IAnaam, M. N.Andrei, C.Andreou, D.Andrews, H. A.Andronic, A.Angeletti, M.Anguelov, VAnson, C.Anticic, T.Antinori, F.Antonioli, P.Anwar, R.Apadula, N.Aphecetche, L.Appelshaeuser, H.Arcelli, S.Arnaldi, R.Arnold, O. W.Arratia, M.Arsene, I. C.Arslandok, M.Augustinus, A.Averbeck, R.Azmi, M. D.Badala, A.Baek, Y. W.Bagnasco, S.Bailhache, R.Bala, R.Baldisseri, A.Ball, M.Baral, R. C.Barbano, A. M.Barbera, R.Barile, F.Barioglio, L.Barnafoldi, G. G.Barnby, L. S.Barret, VBartalini, P.Barth, K.Bartsch, E.Bastid, N.Basu, S.Batigne, G.Batyunya, B.Batzing, P. C.Bazo Alba, J. L.Bearden, I. G.Beck, H.Bedda, C.Behera, N. K.Belikov, IBellini, F.Bello Martinez, H.Bellwied, R.Beltran, L. G. 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DOI
10.1016/j.nuclphysa.2018.09.020
발행일
2019-02
유형
Article; Proceedings Paper
저널명
Nuclear Physics A
982
페이지
451 ~ 454