Abstract
We study the fragmentation (far forward/backward) region of heavy ion collisions by considering an at-rest nucleus which is struck by a relativistic sheet of colored glass. By means of a simple classical model, we calculate the subsequent evolution of baryons and the associated radiation. We confirm that the struck nucleus undergoes a compression and that the dynamics of the early times of the collision are best described by two separate fluids as the produced radiation's velocity distribution is very different to the velocity distribution of the matter in the struck nucleus.
Highlights
The fragmentation region of heavy-ion collisions is interesting as it is the only baryon-rich [1] part of phase space in the presence of strong gluon fields.It was first observed in [2] that, upon interaction with a relativistic heavy-ion projectile, the target will undergo some compression and that this in turn will increase the baryon and energy density in the fireball
By means of a classical model of the target we would like to achieve two goals: the first is to reevaluate the compression of the nucleus to include the effects of saturation in the framework of the color-glass condensate (CGC), and our second goal is to develop an intuitive picture of the earlytime dynamics of both the struck particles and the resultant radiation
II we present a brief review of the equations of motion describing a classical results from colliding two infinitesimally thin sheets
Summary
The fragmentation (very forward/backward) region of heavy-ion collisions is interesting as it is the only baryon-rich [1] part of phase space in the presence of strong gluon fields. It was first observed in [2] that, upon interaction with a relativistic heavy-ion projectile, the target will undergo some compression and that this in turn will increase the baryon and energy density in the fireball. In the current paper we will use the classical quark-CGC interaction of [8,9] to treat the evolution of the quarks while approximating the gluon radiation spectrum by a flat distribution. Particle interacting with a sheet of colored glass We use these equations of motion to derive a momentum distribution of the struck quark after averaging over the classical sources. V where we highlight the realization of our two goals
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