Publication : t20/020
Skewness of mean transverse momentum fluctuations in heavy-ion collisions
Giacalone G. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)Gardim F. G. ()
Noronha-Hostler J. ()
Ollitrault J.-Y. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)
Abstract:Année de publication : 2021
We propose the skewness of mean transverse momentum, ⟨pt⟩, fluctuations as a fine probe of hydrodynamic behavior in relativistic nuclear collisions. We describe how the skewness of the ⟨pt⟩ distribution can be analyzed experimentally, and we use hydrodynamic simulations to predict its value. We predict in particular that ⟨pt⟩ fluctuations have positive and nontrivial skew at a given collision centrality. We elucidate the origin of this result by deriving generic formulas relating the fluctuations of ⟨pt⟩ to the fluctuations of the early-time thermodynamic quantities. We thus argue that the positive skewness of ⟨pt⟩ fluctuations is a universal prediction of hydrodynamic models.
Revue : Phys. Rev. C 103 024910 (2021)
DOI : 10.1103/PhysRevC.103.024910
Preprint : arXiv:2004.09799
Keywords : Nuclear Theory (nucl-th); High Energy Physics - Experiment (hep-ex); High Energy Physics - Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
Langue : Anglais
Fichier(s) à télécharger :
publi.pdf
