Search for the Elusive Jet-Induced Diffusion Wake in -Jets with 2D Jet Tomography in High-Energy Heavy-Ion Collisions
Abstract
Diffusion wake is an unambiguous part of the jet-induced medium response in high-energy heavy-ion collisions that leads to a depletion of soft hadrons in the opposite direction of the jet propagation. New experimental data on Z-hadron correlation in Pb+Pb collisions at the Large Hadron Collider show, however, an enhancement of soft hadrons in the direction of both the Z and the jet. Using a coupled linear Boltzmann transport and hydro model, we demonstrate that medium modification of partons from the initial multiple parton interaction (MPI) gives rise to a soft hadron enhancement that is uniform in azimuthal angle while jet-induced medium response and soft gluon radiation dominate the enhancement in the jet direction. After subtraction of the contributions from MPI with a mixed-event procedure, the diffusion wake becomes visible in the near-side Z-hadron correlation. We further employ the longitudinal and transverse gradient jet tomography for the first time to localize the initial jet production positions in Z/γ-jet events in which the effect of the diffusion wake is apparent in Z/γ-hadron correlation even without the subtraction of the MPI contribution.
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE; National Natural Science Foundation of China (NSFC); National Science Foundation (NSF); UCB-CCNU Collaboration; Guangdong Major Project of Basic and Applied Basic Research; Science and Technology Program of Guangzhou
- OSTI Identifier:
- 1813883
- Alternate Identifier(s):
- OSTI ID: 1829694
- Grant/Contract Number:
- AC02-05CH11231; 11935007; 11221504; 11861131009; 11890714; 12075098; ACI-1550228; OAC-2004571; 2020B0301030008; 20190500001
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Name: Physical Review Letters Journal Volume: 127 Journal Issue: 8; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; collective flow; hard scattering; hydrodynamic models; jets & heavy flavor physics; photon, lepton & quark production; QCD in nuclear reactions; quark & gluon jets; quark-gluon plasma; relativistic heavy-ion collisions; W & Z bosons
Citation Formats
Chen, Wei, Yang, Zhong, He, Yayun, Ke, Weiyao, Pang, Long-Gang, and Wang, Xin-Nian. Search for the Elusive Jet-Induced Diffusion Wake in Z / γ -Jets with 2D Jet Tomography in High-Energy Heavy-Ion Collisions. United States: N. p., 2021.
Web. doi:10.1103/PhysRevLett.127.082301.
Chen, Wei, Yang, Zhong, He, Yayun, Ke, Weiyao, Pang, Long-Gang, & Wang, Xin-Nian. Search for the Elusive Jet-Induced Diffusion Wake in Z / γ -Jets with 2D Jet Tomography in High-Energy Heavy-Ion Collisions. United States. https://doi.org/10.1103/PhysRevLett.127.082301
Chen, Wei, Yang, Zhong, He, Yayun, Ke, Weiyao, Pang, Long-Gang, and Wang, Xin-Nian. Tue .
"Search for the Elusive Jet-Induced Diffusion Wake in Z / γ -Jets with 2D Jet Tomography in High-Energy Heavy-Ion Collisions". United States. https://doi.org/10.1103/PhysRevLett.127.082301.
@article{osti_1813883,
title = {Search for the Elusive Jet-Induced Diffusion Wake in Z / γ -Jets with 2D Jet Tomography in High-Energy Heavy-Ion Collisions},
author = {Chen, Wei and Yang, Zhong and He, Yayun and Ke, Weiyao and Pang, Long-Gang and Wang, Xin-Nian},
abstractNote = {Diffusion wake is an unambiguous part of the jet-induced medium response in high-energy heavy-ion collisions that leads to a depletion of soft hadrons in the opposite direction of the jet propagation. New experimental data on Z-hadron correlation in Pb+Pb collisions at the Large Hadron Collider show, however, an enhancement of soft hadrons in the direction of both the Z and the jet. Using a coupled linear Boltzmann transport and hydro model, we demonstrate that medium modification of partons from the initial multiple parton interaction (MPI) gives rise to a soft hadron enhancement that is uniform in azimuthal angle while jet-induced medium response and soft gluon radiation dominate the enhancement in the jet direction. After subtraction of the contributions from MPI with a mixed-event procedure, the diffusion wake becomes visible in the near-side Z-hadron correlation. We further employ the longitudinal and transverse gradient jet tomography for the first time to localize the initial jet production positions in Z/γ-jet events in which the effect of the diffusion wake is apparent in Z/γ-hadron correlation even without the subtraction of the MPI contribution.},
doi = {10.1103/PhysRevLett.127.082301},
journal = {Physical Review Letters},
number = 8,
volume = 127,
place = {United States},
year = {Tue Aug 17 00:00:00 EDT 2021},
month = {Tue Aug 17 00:00:00 EDT 2021}
}
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