The McLerran-Venugopalan Model (MV) of Color Glass Condensate for two colliding nuclei has been solved in the past using numerical methods and recursive analytic solution. On the other hand, in the weak field limit explicit analytic solutions in transverse momentum space have, in principle, been known for quite some time. Based on the latter we derive analytic expressions for gluon 2-point...
Nuclear deformation is an ubiqutous phenomenon for most atomic nuclei, reflecting collective motion induced by interaction between valance nucleons and shell structure. In most cases, the deformation has a quadrupole shape that is charactorized by overall strength $\beta_2$ and triaxiality $\gamma$ (prolate $\gamma=0$, obolate $\gamma=\pi/3$ and triaxial otherwise). Collisions of deformed...
While it is well known that there is a significant amount of conserved charges in the initial state of nuclear collisions, the production of these due to gluon splitting has yet to be thoroughly investigated. The ICCING (Initial Conserved Charges in Nuclear Geometry) algorithm reconstructs these quark distributions, providing conserved strange, baryon, and electric charges, by sampling a given...
We demonstrate that hard dijet production via inelastic diffraction is a promising channel for probing gluon saturation at the Electron-Ion Collider. Diffraction refers to a process in which there is a large rapidity gap between the produced jets and the nuclear target, while inelastic means that the two hard jets - a quark-antiquark pair generated by the decay of the virtual photon - are...
Jets produced in heavy-ion collisions provide important information about the medium that they traverse. Their seeds, highly energetic partons that are created via hard scatterings during the collision, are affected by all different stages of the medium, including the pre-equilibrium precursor state of the quark-gluon plasma, which is known as the glasma. We will report on our numerical...
We use the boost-invariant IP-Glasma+MUSIC+UrQMD framework to isolate and study the effects of initial state geometry on observables. The study of spherically symmetric nuclei via heavy ion collisions cannot fully distinguish between the effects of collision centrality and initial state geometry on the hydrodynamic QGP or the hadron resonance gas. By using deformed collision systems such as...
Hydrodynamic attractor behavior plays a key role in the pre-equilibrium evolution of expanding quark-gluon plasmas. Especially, the early-time hydrodynamic attractor allows for early-time initialization of hydrodynamic modelings, which strongly supports the applications of fluid dynamics to small colliding systems.
The hydrodynamic attractor has been well-established in conformal fluids,...
A crucial open question is why many models of expanding systems exhibit an apparent simplification in their description while gradients in the system are still large and hydrodynamics is not expected to apply. We discuss a new conceptual approach to understand the pre-equilibrium bulk evolution of a system in terms of a reduced set of slow modes. For concreteness we consider a kinetic theory...
Recently observed signs of collectivity in small systems has highlighted the need for a better understanding of equilibration in small and large collisions systems. In search of this, the QCD effective kinetic theory formulated by Arnold, Moore and Yaffe (AMY) [1] has emerged as a promising candidate. In order to bridge the gap between theory and experiments we develop a parton cascade that...
Color Glass Condensate (CGC) effective field theory (EFT) at leading order describes well the Deep Inelastic Scattering (DIS) inclusive cross section data at small-x as measured by the HERA experiments [1-3]. Recently the inclusive DIS impact factors have been calculated in Next-to-Leading Order (NLO) accuracy in CGC EFT [4-6], and the soft gluon divergence present at NLO has been factorized...
Nuclear deformation is an ubiquitous phenomenon for most atomic nuclei, reflecting collective motion induced by interaction between valance nucleons and shell structure. In most cases, the deformation has a quadrupole shape that is characterized by overall strength $\beta_2$ and triaxiality $\gamma$, and/or a octuple shape $\beta_3$. Nuclear deformation enhances the fluctuations of harmonic...
Scaling phenomena, and the associated self-similar evolution, play an important role in characterizing the off-equilibrium evolution of many physical systems. In far-from-equilibrium QCD, the distribution functions of quarks and gluons have been found to have self-similar evolution in terms of a scaling function and scaling exponents [1,2,3]. In this work [4] we use the collision kernel for...
Trento-3D is a parametric initial condition model, specifically designed for rapidly generating 3D energy distributions to initialize fully (3+1)-dimensional, event-by-event hydrodynamic simulations of ultrarelativistic heavy-ion collisions. Trento-3D builds upon the well-established T${}_\mathrm{R}$ENTo model [1], which samples nuclear configuration with subnucleonic structure and determines...
Large angle gluon radiations induced by multiple parton scatterings contribute to dijet production in deeply inelastic scattering off a large nucleus at the Electron- Ion Collider. Within the generalized high-twist approach to multiple parton scattering, the dijet cross section of eA at the leading order in perturbative QCD and large Bjorken momentum fraction xB can be expressed as a...
A multi-phase transport (AMPT) model has been successful in reproducing a wide range of observables in relativistic heavy-ion collisions. However, certain key parameters need to have significantly different values for pp and central AA collisions for the model to well describe the yield and transverse momentum spectrum of the bulk matter.
In this work[1], we extensively study the system...
