Eur. Phys. J. A (2017) 53: 218
https://doi.org/10.1140/epja/i2017-12422-3

Regular Article - Theoretical Physics

Light fragment production at CERN Super Proton Synchrotron

¹ National Research Centre “Kurchatov Institute”, 123182, Moscow, Russia
² National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409, Moscow, Russia
³ Bogoliubov Laboratory of Theoretical Physics, JINR, 141980, Dubna, Russia

^* e-mail: y.b.ivanov@yandex.ru

Received: 27 July 2017
Accepted: 24 October 2017
Published online: 20 November 2017

Abstract

Recent data on the deutron and ³He production in central Pb+Pb collisions at the CERN Super Proton Synchrotron (SPS) energies measured by the NA49 Collaboration are analyzed within the model of the three-fluid dynamics (3FD) complemented by the coalescence model for the light-fragment production. The simulations are performed with different equations of state --with and without deconfinement transition. It is found that scenarios with the deconfinement transition are preferable for reproduction rapidity distributions of deuterons and ³ He, the corresponding results well agree with the experimental data. At the same time the calculated transverse-mass spectra at midrapidity do not agree that nicely with the experimental data. The latter apparently indicate that coalescence coefficients should be temperature and/or momentum dependent.