[논문]Longitudinal and azimuthal evolution of two-particle transverse momentum correlations in Pb–Pb collisions at  s NN  = 2.76 TeV

Acharya, S.; Adamová; , D.; Adler, A.; Adolfsson, J.; Aggarwal, M.M.; Aglieri Rinella, G.; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, S.; Ahn, S.U.; Akindinov, A.; Al-Turany, M.; Alam, S.N.; Albuquerque, D.S.D.; Aleksandrov, D.; Alessandro, B.; Alfanda, H.M.; Alfaro Molina, R.; Ali, B.; Ali, Y.; Alici, A.; Alkin, A.; Alme, J.; Alt, T.; Altenkamper, L.; Altsybeev, I.; Anaam, M.N.; Andrei, C.; Andreou, D.; Andrews, H.A.; Andronic, A.; Angeletti, M.; Anguelov, V.; Anson, C.; Antič; ić; , T.; Antinori, F.; Antonioli, P.; Anwar, R.; Apadula, N.; Aphecetche, L.; Appelshä; user, H.; Arcelli, S.; Arnaldi, R.; Arratia, M.; Arsene, I.C.; Arslandok, M.; Augustinus, A.; Averbeck, R.; Aziz, S.; Azmi, M.D.; Badalà; , A.; Baek, Y.W.; Bagnasco, S.; Bai, X.; Bailhache, R.; Bala, R.; Baldisseri, A.; Ball, M.; Balouza, S.; Barbera, R.; Barioglio, L.; Barnafö; ldi, G.G.; Barnby, L.S.; Barret, V.; Bartalini, P.; Ba

doi:10.1016/j.physletb.2020.135375

[해외논문] Longitudinal and azimuthal evolution of two-particle transverse momentum correlations in Pb–Pb collisions at s NN = 2.76 TeV 원문보기

Physics letters: B, v.804, 2020년, pp.135375 -

Acharya, S. (Variable Energy Cyclotron Centre, Homi Bhabha National Institute) , Adamová, D. (Nuclear Physics Institute of the Czech Academy of Sciences) , Adler, A. (Johann-Wolfgang-Goethe Universitä) , Adolfsson, J. (t, Frankfurt Institut fü) , Aggarwal, M.M. (r Informatik, Fachbereich Informatik und Mathematik) , Aglieri Rinella, G. (Lund University Department of Physics, Division of Particle Physics) , Agnello, M. (Physics Department, Panjab University) , Agrawal, N. (European Organization for Nuclear Research (CERN)) , Ahammed, Z. (Dipartimento DISAT del Politecnico, Sezione INFN) , Ahmad, S. (Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”) , Ahn, S.U. (Variable Energy Cyclotron Centre, Homi Bhabha National Institute) , Akindinov, A. (Department of Physics, Aligarh Muslim University) , Al-Turany, M. (Korea Institute of Science and Technology Information) , Alam, S.N. , Albuquerque, D.S.D. , Aleksandrov, D. , Alessandro, B. , Alfanda, H.M. , Alfaro Molina, R. , Ali, B. , Ali, Y. , Alici, A. , Alkin, A. , Alme, J. , Alt, T. , Altenkamper, L. , Altsybeev, I. , Anaam, M.N. , Andrei, C. , Andreou, D. , Andrews, H.A. , 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. , Arratia, M. , Arsene, I.C. , Arslandok, M. , Augustinus, A. , Averbeck, R. , Aziz, S. , Azmi, M.D. , Badalà, A. , Baek, Y.W. , Bagnasco, S. , Bai, X. , Bailhache, R. , Bala, R. , Baldisseri, A. , Ball, M. , Balouza, S. , Barbera, R. , Barioglio, L. , Barnaföldi, G.G. , Barnby, L.S. , Barret, V. , Bartalini, P. , Ba

Abstract ▼ AI-Helper

Abstract This paper presents the first measurements of the charge independent (CI) and charge dependent (CD) two-particle transverse momentum correlators G 2 CI and G 2 CD in Pb–Pb collisions at s NN = 2.76 TeV by the ALICE collaboration. The two-particle transverse momentum correlator G 2 was introduced as a measure of the momentum current transfer between neighboring system cells. The correlators are measured as a function of pair separation in pseudorapidity (Δη) and azimuth (Δφ) and as a function of collision centrality. From peripheral to central collisions, the correlator G 2 CI exhibits a longitudinal broadening while undergoing a monotonic azimuthal narrowing. By contrast, G 2 CD exhibits a narrowing along both dimensions. These features are not reproduced by models such as HIJING and AMPT. However, the observed narrowing of the correlators from peripheral to central collisions is expected to result from the stronger transverse flow profiles produced in more central collisions and the longitudinal broadening is predicted to be sensitive to momentum currents and the shear viscosity per unit of entropy density η / s of the matter produced in the collisions. The observed broadening is found to be consistent with the hypothesized lower bound of η / s and is in qualitative agreement with values obtained from anisotropic flow measurements.

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