Dijet Acoplanarity in CUJET3 as a Probe of the Nonperturbative Color Structure of QCD Perfect Fluids
Abstract
Using the CUJET3=DGLV+VISHNU jet-medium interaction framework, we show that dijet azimuthal acoplanarity in high energy A + A collisions is sensitive to possible non-perturbative enhancement of the jet transport coefficient, $$\hat{q}$$(T,E), in the QCD crossover temperature T ~ 150–300 MeV range. With jet-medium couplings constrained by global RHIC& LHC χ2 fits to nuclear modification data on RAA(pT > 20) GeV, we compare predictions of the medium induced dijet transverse momentum squared, $$Q_s^2~\langle \hat{q}L\rangle~ΔΦ^2E^2$$, in two models of the temperature, T, and jet energy E dependence of the jet medium transport coefficient, $$\hat{q}$$(T,E)). In one model, wQGP, the chromo degrees of freedom (dof) are approximated by a perturbative dielectric gas of quark and gluons dof. In the second model, sQGMP, we consider a nonperturbative partially confined semi-Quark-Gluon-Monopole-Plasma with emergent color magnetic dof constrained by lattice QCD data. Unlike the slow variation of the scaled jet transport coefficient, $$\hat{q}_{wQGP}/T^3$$, the sQGMP model $$\hat{q}_{sQGMP}/T^3$$ features a sharp maximum in the QCD confinement crossover T range. We show that the dijet path averaged medium induced azimuthal acoplanarity, Δφ2, in sQGMP is robustly ~ 2 times larger than in perturbative wQGP. even though the radiative energy loss in both models is very similar as needed to fit the same RAA data. Future A+A dijet acoplanarity measurements constrained together with single jet RAA and νn measurements therefore appears to be a promising strategy to search for possible signatures of critical opalescence like phenomena in the QCD confinement temperature range.
- Authors:
-
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Central China Normal Univ., Wuhan (China)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Indiana Univ., Bloomington, IN (United States)
- McGill Univ., Montreal, QC (Canada)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE; Natural Science and Engineering Research Council of Canada (NERSC)
- OSTI Identifier:
- 1826321
- Alternate Identifier(s):
- OSTI ID: 1760956
- Grant/Contract Number:
- AC02-05CH11231; 11935007; 11221504; 11890714; PHY-1913729
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Physics. A
- Additional Journal Information:
- Journal Volume: 1005; Journal ID: ISSN 0375-9474
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; quark gluon plasmas; heavy ion collisions; jet quenching; dijet acoplanarity
Citation Formats
Gyulassy, M., Jacobs, P. M., Liao, J., Shi, S., Wang, X. N., and Yuan, F. Dijet Acoplanarity in CUJET3 as a Probe of the Nonperturbative Color Structure of QCD Perfect Fluids. United States: N. p., 2020.
Web. doi:10.1016/j.nuclphysa.2020.121938.
Gyulassy, M., Jacobs, P. M., Liao, J., Shi, S., Wang, X. N., & Yuan, F. Dijet Acoplanarity in CUJET3 as a Probe of the Nonperturbative Color Structure of QCD Perfect Fluids. United States. https://doi.org/10.1016/j.nuclphysa.2020.121938
Gyulassy, M., Jacobs, P. M., Liao, J., Shi, S., Wang, X. N., and Yuan, F. Thu .
"Dijet Acoplanarity in CUJET3 as a Probe of the Nonperturbative Color Structure of QCD Perfect Fluids". United States. https://doi.org/10.1016/j.nuclphysa.2020.121938. https://www.osti.gov/servlets/purl/1826321.
@article{osti_1826321,
title = {Dijet Acoplanarity in CUJET3 as a Probe of the Nonperturbative Color Structure of QCD Perfect Fluids},
author = {Gyulassy, M. and Jacobs, P. M. and Liao, J. and Shi, S. and Wang, X. N. and Yuan, F.},
abstractNote = {Using the CUJET3=DGLV+VISHNU jet-medium interaction framework, we show that dijet azimuthal acoplanarity in high energy A + A collisions is sensitive to possible non-perturbative enhancement of the jet transport coefficient, $\hat{q}$(T,E), in the QCD crossover temperature T ~ 150–300 MeV range. With jet-medium couplings constrained by global RHIC& LHC χ2 fits to nuclear modification data on RAA(pT > 20) GeV, we compare predictions of the medium induced dijet transverse momentum squared, $Q_s^2~\langle \hat{q}L\rangle~ΔΦ^2E^2$, in two models of the temperature, T, and jet energy E dependence of the jet medium transport coefficient, $\hat{q}$(T,E)). In one model, wQGP, the chromo degrees of freedom (dof) are approximated by a perturbative dielectric gas of quark and gluons dof. In the second model, sQGMP, we consider a nonperturbative partially confined semi-Quark-Gluon-Monopole-Plasma with emergent color magnetic dof constrained by lattice QCD data. Unlike the slow variation of the scaled jet transport coefficient, $\hat{q}_{wQGP}/T^3$, the sQGMP model $\hat{q}_{sQGMP}/T^3$ features a sharp maximum in the QCD confinement crossover T range. We show that the dijet path averaged medium induced azimuthal acoplanarity, Δφ2, in sQGMP is robustly ~ 2 times larger than in perturbative wQGP. even though the radiative energy loss in both models is very similar as needed to fit the same RAA data. Future A+A dijet acoplanarity measurements constrained together with single jet RAA and νn measurements therefore appears to be a promising strategy to search for possible signatures of critical opalescence like phenomena in the QCD confinement temperature range.},
doi = {10.1016/j.nuclphysa.2020.121938},
journal = {Nuclear Physics. A},
number = ,
volume = 1005,
place = {United States},
year = {Thu Dec 10 00:00:00 EST 2020},
month = {Thu Dec 10 00:00:00 EST 2020}
}
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