Conveners
Parallel session 4: Initial state of hadronic and electron-ion collisions & nuclear structure I
- Raju Venugopalan
The LHCb detector’s forward geometry provides unprecedented access to
the very low regions of Bjorken \textit{x} inside the nucleon. With full particle ID and a fast DAQ, LHCb is able to fully reconstruct plentiful charged particles and neutral mesons, as well as relatively rare probes such as heavy quarks, providing a unique set of constraints on nucleon structure functions. This...
The second-order shape phase transition of the Xe isotope chain, predicted to lie around $^{128}\text{Xe}$ to $^{130}$Xe, is challenging to measure in low-energy nuclear experiments. Recently, heavy-ion collisions have demonstrated their potential as an imaging tool for nuclear structure by examining anisotropic flow and its correlations with the mean transverse momentum. Hints of a triaxial...
Measurements of top-quark pairs in heavy-ion collisions are expected to provide novel probes of nuclear parton distribution functions at high Bjoerken-$x$ values, which are difficult to access experimentally using other available probes. We report the observation of top-quark pair production in proton-lead collisions at the centre-of-mass energy of 8.16 TeV in the ATLAS experiment at the LHC....
We present a novel Monte-Carlo implementation of the EKRT model, MC-EKRT, for computing partonic initial states in high-energy nuclear collisions [1]. Our new MC-EKRT event generator is based on collinearly factorized, dynamically fluctuating pQCD minijet production, supplemented with a saturation conjecture that controls the low-$p_T$ particle production. Previously, the EKRT model has been...
It has recently been widely acknowledged that the initial stages are important for correctly describing jet quenching in heavy-ion collisions. In particular, the initial stages influence the emission spectrum of hard partons traversing the plasma. Such calculations require the knowledge of the momentum-broadening kernel $C$, which describes the probability of a jet parton receiving a momentum...
I will discuss the (3+1)D structure of the Glasma [1] in the dilute approximation, a semi-analytic framework for the computation of rapidity-dependent early-time observables in relativistic heavy-ion collisions. Based on the Color Glass Condensate effective field theory, where the gluonic interactions between the large Bjorken-x, static sources localized in the colliding nuclei are described...
We include the perturbative JIMWLK energy evolution into the IP-Glasma initial state description used to simulate the early-time dynamics in heavy ion collisions. By numerically solving the JIMWLK equation on an event-by-event basis, we obtain the energy (Bjorken-$x$) dependent structure of the colliding nuclei. This enables us to predict how the initial state evolves when moving from RHIC to...
