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We solve the Yang-Mills equations in the framework of the McLerran-Venugopalan model for small times tau after a collision of two nuclei. An analytic expansion around tau=0 leads to explicit results for the field strength and the energy…

Nuclear Theory · Physics 2008-11-26 Rainer J. Fries

Using analytic solutions of the Yang-Mills equations we calculate the initial flow of energy of the classical gluon field created in collisions of large nuclei at high energies. We find radial and elliptic flow which follows gradients in…

Nuclear Theory · Physics 2015-06-22 Rainer J. Fries , Guangyao Chen

Nuclei colliding at very high energy create a strong, quasi-classical gluon field during the initial phase of their interaction. We present an analytic calculation of the initial space-time evolution of this field in the limit of very high…

Nuclear Theory · Physics 2017-01-31 Joseph I. Kapusta , Guangyao Chen , Rainer J. Fries , Yang Li

Nuclei colliding at very high energy create a strong, quasi-classical gluon field during the initial phase of their interaction. We present an analytic calculation of the initial space-time evolution of this field in the limit of very high…

Nuclear Theory · Physics 2016-01-06 G. Chen , R. J. Fries , J. I. Kapusta , Y. Li

We perform a calculation of the one- and two-point correlation functions of energy density and axial charge deposited in the glasma in the initial stage of a heavy ion collision at finite proper time. We do this by describing the initial…

High Energy Physics - Phenomenology · Physics 2021-08-26 Pablo Guerrero-Rodríguez , Tuomas Lappi

The initial stages of relativistic heavy ion collisions are studied numerically in the framework of a 2+1 dimensional classical Yang-Mills theory. We calculate the energy and number densities and momentum spectra of the produced gluons. The…

High Energy Physics - Phenomenology · Physics 2009-11-10 T. Lappi

We construct an analytical expression for the distribution of gluons in the state immediately following a heavy ion collision in the quasi-classical limit of QCD given by McLerran-Venugopalan model. The resulting gluon number distribution…

High Energy Physics - Phenomenology · Physics 2009-10-31 Yuri V. Kovchegov

The early stages of a relativistic heavy-ion collision are examined in the framework of an effective classical SU(3) Yang-Mills theory in the transverse plane. We compute the initial energy and number distributions, per unit rapidity, at…

High Energy Physics - Phenomenology · Physics 2009-11-07 Alex Krasnitz , Yasushi Nara , Raju Venugopalan

We report on efforts to construct an event generator that calculates the classical gluon field generated at early times in high energy nuclear collisions. Existing approaches utilize numerical solutions of the Yang-Mills equations after the…

Nuclear Theory · Physics 2017-06-06 Rainer J. Fries , Steven Rose

We present the results of an analytical calculation of the distribution of gluons in the state immediately following a heavy ion collision in the quasi-classical limit of QCD given by McLerran-Venugopalan model. We show that the typical…

High Energy Physics - Phenomenology · Physics 2009-11-07 Yuri V. Kovchegov

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…

High Energy Physics - Phenomenology · Physics 2009-03-12 Hirotsugu Fujii , Kenji Fukushima , Yoshimasa Hidaka

We study systematically the topological charge density and the chiral density correlations in the early stage of high energy nuclear collisions: the intial condition is given by the McLerran-Venugopalan model and the evolution of the gluon…

High Energy Physics - Phenomenology · Physics 2021-02-03 Moran Jia , Junhong Liu , Hongfei Zhang , Marco Ruggieri

The rapidity dependence of the initial energy density in heavy-ion collisions is calculated from a three-dimensional McLerran-Venugopalan model (3dMVn) introduced by Lam and Mahlon. This model is infrared safe since global color neutrality…

Nuclear Theory · Physics 2014-03-12 Sener Ozonder , Rainer J. Fries

Color Glass Condensate (CGC) provides a classical description of dense gluon matter at high energies. Using the McLerran-Venugopalan (MV) model we calculate the initial energy density \epsilon(\tau) in the early stage of the relativistic…

High Energy Physics - Phenomenology · Physics 2014-11-18 Kenji Fukushima

We propose a new approach to initialize the hydrodynamic fields such as energy density distributions and four flow velocity fields in hydrodynamic modeling of high-energy nuclear collisions at the collider energies. Instead of matching the…

Nuclear Theory · Physics 2017-06-09 Michito Okai , Koji Kawaguchi , Yasuki Tachibana , Tetsufumi Hirano

We generalize calculations of the energy-momentum tensor for classical gluon fields in the McLerran-Venugopalan model using the small-$\tau$ power series expansion method. Results to all orders for the energy density and pressures are given…

Nuclear Theory · Physics 2016-08-24 Ming Li , Joseph I. Kapusta

This paper is a slightly modified version of the introductory part of a doctoral dissertation also containing the articles hep-ph/0303076, hep-ph/0409328 and hep-ph/0409058. The paper focuses on the calculation of particle production in a…

High Energy Physics - Phenomenology · Physics 2007-05-23 T. Lappi

The classical Yang-Mills radiation computed in the McLerran-Venugopalan model is shown to be equivalent to the gluon bremsstrahlung distribution to lowest order in pQCD. The classical distribution is also shown to match smoothly onto the…

Nuclear Theory · Physics 2008-11-26 Miklos Gyulassy , Larry McLerran

Using next-to-leading order perturbative QCD and a conjecture of saturation to suppress the production of low-energy partons, we calculate the initial energy densities and formation times for the dissipative fluid dynamical evolution of the…

High Energy Physics - Phenomenology · Physics 2015-06-17 R. Paatelainen , K. J. Eskola , H. Niemi , K. Tuominen

An iterative proceedure is proposed to compute the classical gauge field produced in the collision of two heavy nuclei at high energy. The leading order is obtained by linearizing the Yang-Mills equations in the light-cone gauge, and…

High Energy Physics - Phenomenology · Physics 2009-11-13 Yacine Mehtar-Tani
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