24–28 Oct 2022
University of Santiago de Compostela
Europe/Madrid timezone

New experimental observables to probe (anti)nucleosynthesis with ALICE

27 Oct 2022, 15:40
20m
Classroom 1, Facultad de Ciencias de la Comunicación (University of Santiago de Compostela)

Classroom 1, Facultad de Ciencias de la Comunicación

University of Santiago de Compostela

Campus Norte, Av. de Castelao, s/n, 15782 Santiago de Compostela, Spain
Oral Contribution P5 Heavy Ion Collisions and QCD Phases P5 Heavy Ion Collisions and QCD Phases

Speaker

Francesco Mazzaschi (Universita e INFN Torino (IT))

Description

The formation of light (anti)nuclei in heavy-ion collisions as well as in hadron collisions has been studied experimentally and theoretically for many decades. Two competing (anti)nucleosynthesis models are typically used to describe light (anti)nuclei yields and their ratios to other hadrons in heavy-ion collisions: the statistical hadronization model (SHM) and the nucleon coalescence model.
In this talk, new measurements of (anti)nuclei production in Pb-Pb collisions at the LHC measured with the ALICE experiment are presented. With these measurements, spanning from (anti)deuterons to (anti-)4He, we show how (anti)nuclei can be used to measure both the chemical freeze-out temperature and the baryon chemical potential with great precision. Moreover, these measurements are compared to predictions from the state-of-the art statistical hadronization and coalescence models.
Additionally, the first measurement of event-by-event antideuteron number fluctuations in heavy-ion collisions is also presented and compared with expectations of the SHM and coalescence. This new observable represents an additional testing ground for these two production models.

Primary authors

Francesco Mazzaschi (Universita e INFN Torino (IT)) Ramona Lea (Universita di Brescia (IT))

Presentation materials