68 research outputs found
General formulae for dipole Wilson line correlators with the Color Glass Condensate
We present general formulae to compute Wilson line correlators with the Color
Glass Condensate described by the McLerran-Venugopalan model. We explicitly
construct a complete and non-orthogonal set of color-singlet bases and write
matrix elements down, so that the exponential of the matrix leads to the Wilson
line correlators. We further develop a systematic perturbative expansion of
dipole Wilson line correlators in terms of where is the color
number. As a phenomenological application we calculate the flow harmonics
in the dipole model and discuss the scaling.Comment: 19 pages, 4 figure
Initial energy density and gluon distribution from the Glasma in heavy-ion collisions
We estimate the energy density and the gluon distribution associated with the
classical fields describing the early-time dynamics of the heavy-ion
collisions. We first decompose the energy density into the momentum components
exactly in the McLerran-Venugopalan model, with the use of the Wilson line
correlators. Then we evolve the energy density with the free-field equation,
which is justified by the dominance of the ultraviolet modes near the collision
point. We also discuss the improvement with inclusion of nonlinear terms into
the time evolution. Our numerical results at RHIC energy are fairly consistent
with the empirical values.Comment: 14 pages, 8 figures, 3 table
Two-color quark matter: U(1)_A restoration, superfluidity, and quarkyonic phase
We discuss the phase structure of quantum chromodynamics (QCD) with two
colors and two flavors of light quarks. This is motivated by the increasing
interest in the QCD phase diagram as follows: (1) The QCD critical point search
has been under intensive dispute and its location and existence suffer from
uncertainty of effective U(1)_A symmetry restoration. (2) A new phase called
quarkyonic matter is drawing theoretical and experimental attention but it is
not clear whether it can coexist with diquark condensation. We point out that
two-color QCD is nontrivial enough to contain essential ingredients for (1) and
(2) both, and most importantly, is a system without the sign problem in
numerical simulations on the lattice. We adopt the two-flavor
Nambu-Jona-Lasinio model extended with the two-color Polyakov loop and make
quantitative predictions which can be tested by lattice simulations.Comment: 14 pages, REVTeX4, 12 eps figures; v2: version published in Phys.
Rev. D; v3: an error in the Appendix fixed, Fig. 9 modified accordingl
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