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arXiv · 2608.04592

Directed Flow of Protons and Deuterons in Xe+Cs(I) Collisions: Preliminary BM@N Data and THESEUS Modeling

M. E. Kozhevnikova·M. V. Mamaev·I. A. Zhavoronkova·A. V. Taranenko·Yu. B. Ivanov
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Abstract

Preliminary BM@N results on the directed flow ($v_1$) of protons and deuterons in Xe+Cs(I) collisions at 3.8$A$ GeV are presented for the 10-40% centrality interval. The measured rapidity dependence of $v_1$ is compared with calculations from the THESEUS event generator, where deuterons are produced thermodynamically on an equal basis with hadrons using a late freeze-out scenario. While THESEUS well describes the proton $v_1$ data, it shows a slight but systematic overestimation of the deuteron flow at low and intermediate rapidities. This comparison tests both the collective dynamics of baryon-rich matter and the thermodynamic mechanism of light-nucleus formation at Nuclotron energies.

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M. E. Kozhevnikova, M. V. Mamaev, I. A. Zhavoronkova, A. V. Taranenko, Yu. B. Ivanov. 2026-08-05. Directed Flow of Protons and Deuterons in Xe+Cs(I) Collisions: Preliminary BM@N Data and THESEUS Modeling. https://arxiv.org/abs/2608.04592

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