Production properties of deuterons, helions and tritons via an analytical nucleon coalescence method in Pb-Pb collisions at √s_NN=2.76 TeV

2023/09/28 by Wang, Rui-Qin, Li, Yan-Hao, Song, Jun +1
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2309.16296

Abstract

We improve a nucleon coalescence model to include the coordinate-momentum correlation in nucleon joint distributions, and apply it to Pb-Pb collisions at √s_NN=2.76 TeV to study production properties of deuterons (d), helions (³He) and tritons (t). We give formulas of the coalescence factors B₂ and B₃, and naturally explain their behaviors as functions of the collision centrality and the transverse momentum per nucleon p_T/A. We reproduce the transverse momentum spectra, averaged transverse momenta and yield rapidity densities of d, ³He and t, and find the system effective radius obtained in the coalescence production of light nuclei behaves similarly to Hanbury Brown-Twiss interferometry radius. We particularly give expressions of yield ratios d/p, ³He/d, t/p, ³He/p, d/p², ³He/p³, t/³He and argue their nontrivial behaviors can be used to distinguish production mechanisms of light nuclei.

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