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Title: Precision Dijet Acoplanarity Tomography of the Chromo Structure of Perfect QCD Fluids

Abstract

Dijet acoplanarity is dominated by vacuum (Sudakov) pQCD radiation even in Pb+Pb collisions, but future higher precision measurements of the tails of the acoplanarity distributions can help to resolve separately the medium opacity, χ=L/λ and the color screening scale μ2 from the path averaged BDMS saturation scale Q$$^2_s$$[χ,μ]=∫dL$$\hat{q}$$(E,T(L))∝μ2L/λ that is already well constrained by nuclear modification factor data on RAA(pT). We compare Gaussian (BDMS) and non-Gaussian (GLV) models of medium broadening of vacuum (Sudakov) induced acoplanarity distributions in A+A. With few percent accuracy on the ratio of A+A to p+p distributions, experiments can easily identify non-Gaussian Landau and Rutherford tails due to multiple collisions. However, we find that sub-percent precision will be required to constrain χ and μ separately from Qs.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [5];  [6]
+ Show Author Affiliations
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); MTA Wigner Research Center for Physics, Budapest (Hungary); Columbia Univ., New York, NY (United States). Pupin Lab.; Central China Normal University, Wuhan (China)
  2. MTA Wigner Research Center for Physics, Budapest (Hungary)
  3. Indiana Univ., Bloomington, IN (United States). Center for Exploration of Energy and Matter; Central China Normal Univ., Wuhan (China). Institute of Particle Physics
  4. Indiana Univ., Bloomington, IN (United States). Center for Exploration of Energy and Matter
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Central China Normal University, Wuhan (China)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF); National Science Foundation of China (NSFC)
OSTI Identifier:
1616079
Grant/Contract Number:  
AC02-05CH11231; PHY-1352368; K120660; 11775095; 11375072; 1122150; 11735007
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Physics. A
Additional Journal Information:
Journal Volume: 982; Journal Issue: C; Conference: XXVII. International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2018), Venice (Italy), 13-19 May 2018; Journal ID: ISSN 0375-9474
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Quark Gluon Plasmas sep Heavy Ion Collision; Jet Quenching; Dijet Acoplanarity

Citation Formats

Gyulassy, M., Levai, P., Liao, J., Shi, S., Yuan, F., and Wang, X. N. Precision Dijet Acoplanarity Tomography of the Chromo Structure of Perfect QCD Fluids. United States: N. p., 2019. Web. doi:10.1016/j.nuclphysa.2018.08.038.
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Gyulassy, M., Levai, P., Liao, J., Shi, S., Yuan, F., & Wang, X. N. Precision Dijet Acoplanarity Tomography of the Chromo Structure of Perfect QCD Fluids. United States. https://doi.org/10.1016/j.nuclphysa.2018.08.038
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Gyulassy, M., Levai, P., Liao, J., Shi, S., Yuan, F., and Wang, X. N. Tue . "Precision Dijet Acoplanarity Tomography of the Chromo Structure of Perfect QCD Fluids". United States. https://doi.org/10.1016/j.nuclphysa.2018.08.038. https://www.osti.gov/servlets/purl/1616079.
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@article{osti_1616079,
title = {Precision Dijet Acoplanarity Tomography of the Chromo Structure of Perfect QCD Fluids},
author = {Gyulassy, M. and Levai, P. and Liao, J. and Shi, S. and Yuan, F. and Wang, X. N.},
abstractNote = {Dijet acoplanarity is dominated by vacuum (Sudakov) pQCD radiation even in Pb+Pb collisions, but future higher precision measurements of the tails of the acoplanarity distributions can help to resolve separately the medium opacity, χ=L/λ and the color screening scale μ2 from the path averaged BDMS saturation scale Q$^2_s$[χ,μ]=∫dL$\hat{q}$(E,T(L))∝μ2L/λ that is already well constrained by nuclear modification factor data on RAA(pT). We compare Gaussian (BDMS) and non-Gaussian (GLV) models of medium broadening of vacuum (Sudakov) induced acoplanarity distributions in A+A. With few percent accuracy on the ratio of A+A to p+p distributions, experiments can easily identify non-Gaussian Landau and Rutherford tails due to multiple collisions. However, we find that sub-percent precision will be required to constrain χ and μ separately from Qs.},
doi = {10.1016/j.nuclphysa.2018.08.038},
journal = {Nuclear Physics. A},
number = C,
volume = 982,
place = {United States},
year = {Tue Jan 22 00:00:00 EST 2019},
month = {Tue Jan 22 00:00:00 EST 2019}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.nuclphysa.2018.08.038
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Cited by: 7 works
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Figures / Tables:

Fig. 1 Fig. 1: (a) Jet-Medium multiple scattering broadening of dijet dN/dq2 in BDMS(blue) and GLV(red) approximations without vacuum effects compared to convoluted vacuum+medium distribution for $Q^{2}_{s}$ = 3.2, 6.4, 12.3 GeV 2. (b) The dijet azimuthal dN/dΔφ distributions for $Q^{2}_{s}$ = 9.6 (dash) and 16 (solid) are compared to vacuum p+pmore » (black) for BDMS (blue) and GLV (red). Note that with the intercept at Δφ = π constrained (circled point), very high precision is needed to differentiate BDMS and GLV.« less
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Works referenced in this record:

Event-by-Event Hydrodynamics + Jet Energy Loss: A Solution to the R A A ⊗ v 2 Puzzle
journal, June 2016

A Unified Description for Comprehensive Sets of Jet Energy Loss Observables with CUJET3
journal, November 2017

Jets as a probe of quark-gluon plasmas
journal, February 1986

Reaction operator approach to multiple elastic scatterings
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Polarization probes of vorticity in heavy ion collisions
journal, October 2007

Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
journal, March 2005

Multiple jets and γ -jet correlation in high-energy heavy-ion collisions
journal, July 2018

Measurements of jet quenching with semi-inclusive hadron+jet distributions in Au + Au collisions at s N N = 200 GeV
journal, August 2017

Strongly coupled plasma with electric and magnetic charges
journal, May 2007

Dissipative phenomena in quark-gluon plasmas
journal, January 1985

Jet-like correlations with direct-photon and neutral-pion triggers at s N N = 200  GeV
journal, September 2016

Angular Dependence of Jet Quenching Indicates Its Strong Enhancement near the QCD Phase Transition
journal, May 2009

Probing transverse momentum broadening in heavy ion collisions
journal, December 2016

Radiative energy loss and p⊥-broadening of high energy partons in nuclei
journal, January 1997

Jets in expanding quark-gluon plasmas
journal, November 1986

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    Works referencing / citing this record:

    Acoplanarity of a Lepton Pair to Probe the Electromagnetic Property of Quark Matter
    journal, April 2019

    Acoplanarity of Lepton Pair to Probe the Electromagnetic Property of Quark Matter
    text, January 2018

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      Figures / Tables found in this record:

      Fig. 1 (p. 4)figure
      Fig. 2 (p. 4)figure
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