9th Workshop of the APS Topical Group on Hadronic Physics

Session

Small Systems and Collectivity

Apr 13, 2021, 1:30 PM

Conveners

Small Systems and Collectivity

• Jiangyong Jia (Stony Brook University)

Description

co-hosts: Bjoern Schenke and Julia Velkovska

254. Momentum anisotropies in the initial stages of heavy-ion collisions: the hunt is on

Giuliano Giacalone (Universität Heidelberg)

4/13/21, 1:30 PM

Oral Presentation

Collider data shows that elliptic flow in high-multiplicity proton-nucleus and nucleus-nucleus collisions emerges as a response to the spatial ellipticity characterizing the energy density deposited in the transverse plane by the collision process. For collisions at small multiplicities, however, elliptic flow is expected to receive as well an important contribution from the anisotropic...

228. Dynamical modeling from p-p to A-A collisions with unified picture

Yuuka Kanakubo (Sophia University)

4/13/21, 1:50 PM

Oral Presentation

It is widely known that the quark-gluon plasma (QGP), a state of deconfined quarks and gluons under equilibrium, is generated in relativistic heavy-ion collisions. Compared to the heavy-ion, small colliding systems such as nucleon-induced collisions were regarded as a reference for the heavy-ion collisions. Since around 2010, however, it has been reported that the QGP might be formed even in...

261. Small systems at RHIC: a brief overview

Ron Belmont (University of North Carolina at Greensboro)

4/13/21, 2:10 PM

Oral Presentation

Collisions of heavy nuclei at relativistic energies create the quark-gluon plasma, the phase of matter that existed in the first few microseconds after the big bang. One of the major pillars of heavy-ion physics today is the study of so-called small systems, consisting of collisions of a light nucleus on a heavy nucleus or even of two light nuclei. In this talk we will give a short overview...

224. Probing QCD medium effects in small systems at the LHC via heavy flavor particles

Yousen Zhang (Rice University (US))

4/13/21, 2:30 PM

Oral Presentation

Hot QCD medium effects were extensively studied in heavy nucleus-nucleus collisions while the measurements in proton-nucleus (pA) collisions were primarily to study cold nuclear effects. However, the observations of the collective flow of light flavor particles in both proton-proton (pp) and pA collisions raised the question whether the hot medium effects are negligible in small-collision...

232. Experimental approaches to flow and nonflow in small systems

Shengquan Tuo (Vanderbilt University)

4/13/21, 2:50 PM

Oral Presentation

Understanding the onset of collective flow from small to large heavy ion collisions is crucial for the study of the smallest QGP droplet. As particle multiplicity decreases in smaller systems, flow signal becomes smaller and nonflow background is larger. The nonflow correlations can be significant even when imposing a large pseudorapidity gap between particles when using two-particle...