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We improve a nucleon coalescence model to include the coordinate-momentum correlation in nucleon joint distributions, and apply it to Pb-Pb collisions at √sNN=2.760.16em0exTeV 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 pT/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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Wang et al. (2024) studied this question.
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