We show that the inclusion of a recently found additional term of the spin polarization vector at local equilibrium which is linear in the symmetrized gradients of the velocity field, and the assumption of hadron production at constant temperature restore the quantitative agreement between hydrodynamic model predictions and local polarization measurements in relativistic heavy ion collisions at sNN=200 GeV. The longitudinal component of the spin polarization vector turns out to be very sensitive to the temperature value, with a good fit around 155 MeV. The implications of this finding are discussed.

Local Polarization and Isothermal Local Equilibrium in Relativistic Heavy Ion Collisions / Becattini F.; Buzzegoli M.; Palermo A.; Inghirami G.; Karpenko I.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 127:(2021), pp. 272302-272306. [10.1103/PhysRevLett.127.272302]

Local Polarization and Isothermal Local Equilibrium in Relativistic Heavy Ion Collisions

Becattini F.
Conceptualization
;
Buzzegoli M.
Membro del Collaboration Group
;
Palermo A.
Membro del Collaboration Group
;
Inghirami G.
Membro del Collaboration Group
;
2021

Abstract

We show that the inclusion of a recently found additional term of the spin polarization vector at local equilibrium which is linear in the symmetrized gradients of the velocity field, and the assumption of hadron production at constant temperature restore the quantitative agreement between hydrodynamic model predictions and local polarization measurements in relativistic heavy ion collisions at sNN=200 GeV. The longitudinal component of the spin polarization vector turns out to be very sensitive to the temperature value, with a good fit around 155 MeV. The implications of this finding are discussed.
2021
127
272302
272306
Becattini F.; Buzzegoli M.; Palermo A.; Inghirami G.; Karpenko I.
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1259317
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