Quark Matter 2019 - the XXVIIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions

Session

Parallel Session - Initial state II

6 Nov 2019, 14:00

Wanda Reign Wuhan Hotel

Conveners

Parallel Session - Initial state II

• Bolek Wyslouch (Massachusetts Inst. of Technology (US))

505. First observation of diffraction in proton-lead collisions with the CMS detector

Dmitry Sosnov for the CMS Collaboration (NRC Kurchatov Institute PNPI (RU))

06/11/2019, 14:00

Initial state and approach to equilibrium

Oral Presentation

We present the first measurements of diffraction in $\sqrt{s_{NN}}=8.16$ TeV proton-lead collisions within CMS. The very large angular coverage of CMS is used to tag rapidity gaps on both the proton-going and lead-going sides and to identify both pomeron-lead and pomeron-proton topologies. Since the previous highest energy measurement of these processes was at $\sqrt{s_{NN}}=30$ GeV, the...

596. Adiabatic hydrodynamization in rapidly-expanding quark-gluon plasma

Jasmine Brewer (Massachusetts Institute of Technology)

06/11/2019, 14:20

Initial state and approach to equilibrium

Oral Presentation

We propose a new scenario characterizing the transition of the quark-gluon plasma (QGP) produced in heavy-ion collisions from a highly non-equilibrium state at early times toward a fluid described by hydrodynamics at late times. In this scenario, the bulk evolution is governed by a set of slow modes, after an emergent time scale τ_{Redu} when the number of modes that govern the bulk evolution...

323. Prescaling and far-from-equilibrium hydrodynamics in the quark-gluon plasma

Aleksas Mazeliauskas

06/11/2019, 14:40

Initial state and approach to equilibrium

Oral Presentation

We use the leading-order QCD kinetic equations with quarks and gluons to study the QGP in the far-from-equilibrium state. At weak coupling, we demonstrate the emergence of early hydrodynamic behavior--prescaling--around a nonthermal fixed point, which is qualitatively different from the more conventional hydrodynamics around equilibrium. Prescaling is a far-from-equilibrium phenomenon which...

447. Connecting far-from-equilibrium hydrodynamics to resummed transport coefficients and attractor solutions

Jorge Noronha (University of Sao Paulo)

06/11/2019, 15:00

Initial state and approach to equilibrium

Oral Presentation

We show how far-from-equilibrium hydrodynamics may be systematically defined, for arbitrary flow profiles, in terms of a generalized tensorial expansion with transport coefficients that contain an all order resummation in gradients. In this formulation, the transport coefficients of far-from-equilibrium fluid dynamics depend not only on the microscopic properties of the system but also on the...

211. Initial Condition for Matter in the Fragmentation Region

Larry McLerran (INT, University of Washington)

06/11/2019, 15:20

Initial state and approach to equilibrium

Oral Presentation

The initial conditions for matter produced in the fragmentation region of high
energy hadronic collisions can be computed using the theory of the Color Glass Condensate. We consider the scattering of a classical color charge from a large nucleus and compute produced radiation in the fragmentation region of the classical color charge. Our results are to all order in the strength of the color...

409. Collinear resummation for the non-linear evolution in QCD at high energy

Edmond Iancu (Université Paris-Saclay (FR))

06/11/2019, 15:40

Initial state and approach to equilibrium

Oral Presentation

The next-to-leading order (NLO) Balitsky-Kovchegov (BK) equation describing the high-energy evolution of the scattering between a dilute projectile and a dense target suffers from instabilities unless it is supplemented by a proper resummation of the radiative corrections enhanced by large transverse logarithms. These instabilities are associated with large, anti-collinear, double logarithms...