Hydrodynamic collectivity in proton–proton collisions at 13 TeV
In this paper, we investigate the hydrodynamic collectivity in proton–proton (p–p) collisions at 13 TeV, using iEBE-VISHNU hybrid model with HIJING initial conditions. With properly tuned parameters, our model simulations can remarkably describe all the measured 2-particle correlations, including in...
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doaj-9a116b602b82429e92f7e60a52dc2b9b2020-11-24T21:33:57ZengElsevierPhysics Letters B0370-26932018-05-01780495500Hydrodynamic collectivity in proton–proton collisions at 13 TeVWenbin Zhao0You Zhou1Hao-jie Xu2Weitian Deng3Huichao Song4Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China; Collaborative Innovation Center of Quantum Matter, Beijing 100871, ChinaNiels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 Copenhagen, Denmark; Corresponding authors.School of Science, Huzhou University, Huzhou 313000, China; Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, ChinaSchool of Physics, Huazhong University of Science and Technology, Wuhan 430074, ChinaDepartment of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China; Collaborative Innovation Center of Quantum Matter, Beijing 100871, China; Center for High Energy Physics, Peking University, Beijing 100871, China; Corresponding authors.In this paper, we investigate the hydrodynamic collectivity in proton–proton (p–p) collisions at 13 TeV, using iEBE-VISHNU hybrid model with HIJING initial conditions. With properly tuned parameters, our model simulations can remarkably describe all the measured 2-particle correlations, including integrated and differential elliptic flow coefficients for all charged and identified hadrons (KS0, Λ). However, our model calculations show positive 4-particle cumulant c2{4} in high multiplicity pp collisions, and can not reproduce the negative c2{4} measured in experiment. Further investigations on the HIJING initial conditions show that the fluctuations of the second order anisotropy coefficient ε2 increases with the increase of its mean value, which leads to a similar trend of the flow fluctuations. For a simultaneous description of the 2- and 4- particle cumulants within the hydrodynamic framework, it is required to have significant improvements on initial condition for pp collisions, which is still lacking of knowledge at the moment.http://www.sciencedirect.com/science/article/pii/S0370269318302119 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Wenbin Zhao You Zhou Hao-jie Xu Weitian Deng Huichao Song |
spellingShingle |
Wenbin Zhao You Zhou Hao-jie Xu Weitian Deng Huichao Song Hydrodynamic collectivity in proton–proton collisions at 13 TeV Physics Letters B |
author_facet |
Wenbin Zhao You Zhou Hao-jie Xu Weitian Deng Huichao Song |
author_sort |
Wenbin Zhao |
title |
Hydrodynamic collectivity in proton–proton collisions at 13 TeV |
title_short |
Hydrodynamic collectivity in proton–proton collisions at 13 TeV |
title_full |
Hydrodynamic collectivity in proton–proton collisions at 13 TeV |
title_fullStr |
Hydrodynamic collectivity in proton–proton collisions at 13 TeV |
title_full_unstemmed |
Hydrodynamic collectivity in proton–proton collisions at 13 TeV |
title_sort |
hydrodynamic collectivity in proton–proton collisions at 13 tev |
publisher |
Elsevier |
series |
Physics Letters B |
issn |
0370-2693 |
publishDate |
2018-05-01 |
description |
In this paper, we investigate the hydrodynamic collectivity in proton–proton (p–p) collisions at 13 TeV, using iEBE-VISHNU hybrid model with HIJING initial conditions. With properly tuned parameters, our model simulations can remarkably describe all the measured 2-particle correlations, including integrated and differential elliptic flow coefficients for all charged and identified hadrons (KS0, Λ). However, our model calculations show positive 4-particle cumulant c2{4} in high multiplicity pp collisions, and can not reproduce the negative c2{4} measured in experiment. Further investigations on the HIJING initial conditions show that the fluctuations of the second order anisotropy coefficient ε2 increases with the increase of its mean value, which leads to a similar trend of the flow fluctuations. For a simultaneous description of the 2- and 4- particle cumulants within the hydrodynamic framework, it is required to have significant improvements on initial condition for pp collisions, which is still lacking of knowledge at the moment. |
url |
http://www.sciencedirect.com/science/article/pii/S0370269318302119 |
work_keys_str_mv |
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