CERN Accelerating science

Article
Title	Quarkonium polarization in p-p and Pb-Pb collisions
Author(s)	Sahu, Dushmanta (Indian Inst. Tech., Indore)
Collaboration	ALICE Collaboration
Publication	2024
Number of pages	2
In:	DAE Symp. Nucl. Phys. 67 (2024) pp.1053-1054
In:	67th DAE Symposium on Nuclear Physics (DAE NPSYMP 2023), Indore, Madhya Pradesh, India, 9 - 23 Dec 2023
Subject category	Nuclear Physics - Experiment ; Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ALICE
Abstract	Polarization is the degree of a particle spin alignment with respect to a given direction. In order to obtain useful information about the quark-gluon plasma (QGP) produced in Pb–Pb collisions and the initial stages of the collision, the study of quarkonium production and polarization is extremely important. In pp collisions, the study of quarkonium polarization (and production cross section) is essential to constrain their production mechanism since various theoretical models provide different predictions for the polarization observables. On the other hand, in heavy-ion collisions, quarkonium polarization can get affected by the magnetic field generated by the fast motion, in opposite direction, of the two colliding charged ions in non-central collisions. In addition, quarkonium polarization may be altered by the presence of the rotating fluid with a large vorticity.

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