Transverse momentum fluctuations as a probe of thermalization and collective dynamics of QGP

2025/05/05 by Samanta, Rupam, Parida, Tribhuban
#FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2505.02706

Abstract

We study fluctuations of mean transverse momentum per particle ([p_T]) in ultrarelativistic heavy-ion collisions. We show that the steep fall in the variance of transverse momentum fluctuation in ultracentral Pb+Pb collision serves as a natural consequence of the thermalization of the QGP medium. We study the correlation between the spectra and [p_T] which maps these fluctuations differentially and dubbed as v₀(p_T). We highlight the importance of v₀(p_T) showing that it plays similar role as anisotropic flow when probing the collective nature of QGP.

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