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Title: Interplaying mechanisms behind single inclusive jet suppression in heavy-ion collisions

Abstract

The suppression factor for single inclusive jets in Pb + Pb collisions at the Large Hadron Collider (LHC) has a weak dependence on the transverse momentum $$p_T$$ and remains almost the same at two colliding energies, $$\sqrt{s}$$ = 2.76 and 5.02 TeV, though the central rapidity density of bulk hadrons increases by about 20%. Here, this phenomenon is investigated within the linear Boltzmann transport (LBT) model, which includes elastic and inelastic processes based on perturbative QCD for both jet shower and recoil medium partons as they propagate through a quark-gluon plasma (QGP). With the dynamic evolution of the QGP given by the 3 + 1 D CLVisc hydrodynamic model with event-by-event fully fluctuating initial conditions, single inclusive jet suppression in Pb + Pb collisions from LBT agrees well with experimental data. The weak $$ \sqrt{s} $$ and $$p_T$$ dependence of the jet suppression factor at LHC are found to result directly from the $$ \sqrt{s} $$ dependence of the initial jet $$p_T$$ spectra and slow $$p_T$$ dependence of the jet energy loss. Contributions from jet-induced medium response, influence of radial expansion, both of which depend on jet-cone size, and jet flavor composition all conjoin to give a slow $$p_T$$ dependence of jet energy loss and the single jet suppression factor RAA , their dependence on $$\sqrt{s}$$ , and jet-cone size. Single inclusive jet suppression at $$\sqrt{s}$$ = 200 GeV is also predicted that actually decreases slightly with pT in the $$p_T$$< 50 GeV/c range because of the steeper initial jet spectra though the $$p_T$$ dependence of the jet energy loss is weaker than that at LHC.

Authors:
 [1];  [2];  [3];  [3];  [4];  [5]
  1. Central China Normal Univ. (China). Key Lab. of Quark and Lepton Physics (MOE) and Inst. of Particle Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division
  2. Wayne State Univ., Detroit, MI (United States). Dept. of Physics and Astronomy
  3. Central China Normal Univ. (China). Key Lab. of Quark and Lepton Physics (MOE) and Inst. of Particle Physics
  4. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division
  5. Central China Normal Univ. (China). Key Lab. of Quark and Lepton Physics (MOE) and Inst. of Particle Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division; Univ. of California, Berkeley, CA (United States). Dept. of Physics
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
National Natural Science Foundation of China (NNSFC); USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1527129
Alternate Identifier(s):
OSTI ID: 1523313
Grant/Contract Number:  
AC02-05CH11231; SC0013460; 11221504; 2014CB845404; ACI-1550228; ACI-1550300
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 99; Journal Issue: 5; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

He, Yayun, Cao, Shanshan, Chen, Wei, Luo, Tan, Pang, Long-Gang, and Wang, Xin-Nian. Interplaying mechanisms behind single inclusive jet suppression in heavy-ion collisions. United States: N. p., 2019. Web. doi:10.1103/PhysRevC.99.054911.
He, Yayun, Cao, Shanshan, Chen, Wei, Luo, Tan, Pang, Long-Gang, & Wang, Xin-Nian. Interplaying mechanisms behind single inclusive jet suppression in heavy-ion collisions. United States. doi:https://doi.org/10.1103/PhysRevC.99.054911
He, Yayun, Cao, Shanshan, Chen, Wei, Luo, Tan, Pang, Long-Gang, and Wang, Xin-Nian. Wed . "Interplaying mechanisms behind single inclusive jet suppression in heavy-ion collisions". United States. doi:https://doi.org/10.1103/PhysRevC.99.054911. https://www.osti.gov/servlets/purl/1527129.
@article{osti_1527129,
title = {Interplaying mechanisms behind single inclusive jet suppression in heavy-ion collisions},
author = {He, Yayun and Cao, Shanshan and Chen, Wei and Luo, Tan and Pang, Long-Gang and Wang, Xin-Nian},
abstractNote = {The suppression factor for single inclusive jets in Pb + Pb collisions at the Large Hadron Collider (LHC) has a weak dependence on the transverse momentum $p_T$ and remains almost the same at two colliding energies, $\sqrt{s}$ = 2.76 and 5.02 TeV, though the central rapidity density of bulk hadrons increases by about 20%. Here, this phenomenon is investigated within the linear Boltzmann transport (LBT) model, which includes elastic and inelastic processes based on perturbative QCD for both jet shower and recoil medium partons as they propagate through a quark-gluon plasma (QGP). With the dynamic evolution of the QGP given by the 3 + 1 D CLVisc hydrodynamic model with event-by-event fully fluctuating initial conditions, single inclusive jet suppression in Pb + Pb collisions from LBT agrees well with experimental data. The weak $ \sqrt{s} $ and $p_T$ dependence of the jet suppression factor at LHC are found to result directly from the $ \sqrt{s} $ dependence of the initial jet $p_T$ spectra and slow $p_T$ dependence of the jet energy loss. Contributions from jet-induced medium response, influence of radial expansion, both of which depend on jet-cone size, and jet flavor composition all conjoin to give a slow $p_T$ dependence of jet energy loss and the single jet suppression factor RAA , their dependence on $\sqrt{s}$ , and jet-cone size. Single inclusive jet suppression at $\sqrt{s}$ = 200 GeV is also predicted that actually decreases slightly with pT in the $p_T$< 50 GeV/c range because of the steeper initial jet spectra though the $p_T$ dependence of the jet energy loss is weaker than that at LHC.},
doi = {10.1103/PhysRevC.99.054911},
journal = {Physical Review C},
number = 5,
volume = 99,
place = {United States},
year = {2019},
month = {5}
}

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