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

Journal Article · · Nuclear Physics. A
 [1];  [2];  [3];  [4];  [5];  [6]
  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)
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.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); National Science Foundation of China (NSFC); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1616079
Alternate ID(s):
OSTI ID: 22889119
Journal Information:
Nuclear Physics. A, Journal Name: Nuclear Physics. A Journal Issue: C Vol. 982; ISSN 0375-9474
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)


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