Oct 21 – 25, 2019
CZiITT
Europe/Warsaw timezone
Call for papers is open! Please submit your paper!

Is orbital angular momentum efficiently transferred to spin degreeds of freedom at NICA energies?

Oct 21, 2019, 12:00 PM
25m
Conference room... (CZiITT)

Conference room...

CZiITT

Centrum Zarządzania Innowacjami i Transferem Technologii Politechniki Warszawskiej cziitt@pw.edu.pl ul. Rektorska 4 00-614 Warszawa
NICA Days 2019 General Session NICA Days 2019 General Session

Speaker

Prof. Alejandro Ayala (Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México)

Description

We compute the relaxation time for quark/antiquark spin and thermal vorticity alignment in a quark-gluon plasma at finite temperature and quark chemical potential. We model the interaction of quark/antiquark spin with thermal vorticity as driven by a phenomenological modification of the elementary quark interaction with gluons. We find that in a scenario where the angular velocity produced in a peripheral heavy-ion collision competes with transverse expansion, and thus is small, quarks/antiquarks take a long time to align their spin with the vorticity. However, when the angular velocity created in the reaction is large, the alignment is efficient and well within the lifetime of the system created in the reaction. The relaxation time is larger for antiquarks which points out to a difference for the polarization of hadrons and antihadrons when this alignment is preserved during hadronization.

Primary author

Prof. Alejandro Ayala (Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México)

Presentation materials