Long- and short-range correlations and their event-scale dependence in high-multiplicity pp collisions at <mml:msqrt>s</mml:msqrt>=13 TeV

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22
Citations

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24

초록

Two-particle angular correlations are measured in high-multiplicity proton-proton collisions at = 13 TeV by the ALICE Collaboration. The yields of particle pairs at short-(eta similar to 0) and long-range (1.6 < |<eta>| < 1.8) in pseudorapidity are extracted on the near-side ( <similar to> 0). They are reported as a function of transverse momentum (p(T)) in the range 1 < p(T)< 4 GeV/c. Furthermore, the event-scale dependence is studied for the first time by requiring the presence of high-p(T) leading particles or jets for varying p(T) thresholds. The results demonstrate that the long-range "ridge" yield, possibly related to the collective behavior of the system, is present in events with high-p(T) processes as well. The magnitudes of the short- and long-range yields are found to grow with the event scale. The results are compared to EPOS LHC and PYTHIA 8 calculations, with and without string-shoving interactions. It is found that while both models describe the qualitative trends in the data, calculations from EPOS LHC show a better quantitative agreement for the p(T) dependency, while overestimating the event-scale dependency.

키워드

Heavy Ion ExperimentsHEAVY-ION COLLISIONSSMALL SYSTEMCOLLECTIVITYPLASMAFLOW
제목
Long- and short-range correlations and their event-scale dependence in high-multiplicity pp collisions at <mml:msqrt>s</mml:msqrt>=13 TeV
저자
Acharya, S.Adamova, D.Adler, A.Adolfsson, J.Aglieri Rinella, G.Agnello, M.Agrawal, N.Ahammed, Z.Ahmad, S.Ahn, S. U.Akbar, Z.Akindinov, A.Al-Turany, M.Albuquerque, D. S. D.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.Anguelov, V.Anticic, T.Antinori, F.Antonioli, P.Anuj, C.Apadula, N.Aphecetche, L.Appelshaeuser, H.Arcelli, S.Arnaldi, R.Arratia, M.Arsene, I. C.Arslandok, M.Augustinus, A.Averbeck, R.Aziz, S.Azmi, M. D.Badala, A.Baek, Y. W.Bai, X.Bailhache, R.Bala, R.Balbino, A.Baldisseri, A.Ball, M.Banerjee, D.Barbera, R.Barioglio, L.Barlou, M.Barnafoeldi, 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. 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DOI
10.1007/JHEP05(2021)290
발행일
2021-05-31
유형
Article
저널명
Journal of High Energy Physics
5