Starting comments / EXP overview

• Alexander Philipp Kalweit (CERN)

Room: Zoom only

The thermal-statistical model applied to nuclear clusters

• Anton Andronic (Westfaelische Wilhelms-Universitaet Muenster (DE))

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Coalescence as the origin of nuclear clusters

• Ulrich Heinz (The Ohio State University)

Room: Zoom only Measurements of the production of light nuclei in relativistic heavy-ion collisions present us with an apparent puzzle: While the momentum spectra of these nuclei indicate a low "kinetic freeze-out” temperature coupled with strong collective flow, their yields reflect a much higher “chemical freeze-out” temperature, consistent with the quark-gluon plasma hadronization temperature. How can these fragile nuclei “survive” the rescattering in the hadronic phase, cooling down in the process and picking up additional collective flow, without getting destroyed and depleted? I will explain how the coalescence model reconciles these observations and how recent kinetic simulations of the process support this model.

Light-nuclei production: experimental measurements vs theoretical predictions

• Luca Barioglio (Universita e INFN Torino (IT))

Room: Zoom only An abundant production of light nuclei and anti-nuclei have been observed in hadron collisions for a long time. However, their production mechanisms are still not completely understood. In this presentation, the experimental results about the production of light (anti-)nuclei in different collision systems and at different energies will be compared with the predictions of the coalescence model and of the statistical hadronisation model.

Coalescence--correlations relation: B2 vs. HBT/radii

• Bernhard Hohlweger (TUM)
• Bernhard Hohlweger (Technische Universitaet Muenchen (DE))

Room: Zoom only Discussion of the EXP effort to test the predicted relation between pair correlations and coalescence yield. Main questions for TH and for the analysis, results and discussion.

Discussion: coalescence vs. HBT Room: Zoom only

Nuclear clusters in an off-equilibrium thermal model

• Volodymyr Vovchenko (Lawrence Berkeley National Laboratory)

Room: Zoom only The production of light (anti-)(hyper-)nuclei during the hadronic phase of heavy-ion collisions at the LHC is discussed in the framework of an extended thermal model approach — the Saha equation —making use of an analogy between the evolution of the early universe after the Big Bang and that of "Little Bangs" created in the lab. Then rate equations are utilized to relax the assumption of relative chemical equilibrium of nuclear reactions, revealing only moderate deviations from the Saha equation baseline.

Cluster formation in a transport model

• Dmytro Oliinychenko
• Dmytro Oliinychenko (Lawrence Berkeley National Laboratory)

Room: Zoom only

Google Doc Discussion Room: Zoom only

Hypertriton structure

• Hans-Werner Hammer

Room: Zoom only

Hypertriton lifetime

• Jean-Marc Richard (IP2I, Lyon)

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Hypertriton yield at ALICE: EXP vs. TH

• Maximiliano Puccio (CERN)
• Maximiliano Puccio

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Discussion: Hypertriton as a probe of cluster formation Room: Zoom only

How to distinguish coalescence from thermal production of light nuclei

• Stanislaw Mrowczynski (Jan Kochanowski University)
• Stanislaw Mrowczynski

Room: Zoom only There are discussed two methods to distinguish the coalescence from thermal production of light nuclei. At first the hadron-deuteron correlation function is shown to carry information about an origin of deuterons, whether they are emitted from a fireball together with all other hadrons or formed due to final state interactions after nucleons left the fireball. Secondly, it is proposed to measure the yield of an exotic nuclide $^{4}$Li and compare it the yield of $^{4}$He. The coalescence and thermal models predict a significantly different ratio of the yields of $^{4}$Li to $^{4}$He. A measurement of $^{4}$Li is discussed.

Google Doc Discussion & Workshop summary Room: Zoom only

TH Colloquium: Jesse Thaler (https://indico.cern.ch/event/888504/) Room: Zoom only