May 17 – 22, 2021
US/Eastern timezone

Light-nuclei production in heavy-ion collisions at RHIC BES in updated Three-fluid Hydrodynamics-based Event Simulator (THESEUS).

May 19, 2021, 10:50 AM
Room B (Zoom)

Room B


zoom co-host: Klaus Dehmelt


Iurii Karpenko (SUBATECH Nantes)


We present an updated event generator THESEUS, based on the three-fluid dynamics (3FD), complemented by UrQMD cascade for the late stage of the nuclear collision. The generator is extended to simulate light-nuclei production in relativistic heavy-ion collisions via thermal mechanism, on the same basis as hadrons.
We present the rapidity, transverse momentum spectra, first ($v_1$) and second ($v_2$) flow harmonics of deuterons, tritons, $^3$He at different collision energies and impact parameters in the RHIC BES range. The results are compared with experimental data from NA49 and STAR.
We show that anti-deuteron spectra from THESEUS are in good agreement with STAR data.
We demonstrate the contributions from the excited states of Helium to the yields of deuteron, triton and $^3$He. The reproduction is achieved without any extra parameters, while the original coalescence approach in 3FD requires a tuning of the coalescence coefficients for each light nucleus separately.

Primary authors

Marina Kozhevnikova (Joint Institute for Nuclear Research, Dubna, Russia) Yuri Ivanov (NRC Kurchatov Institute) Iurii Karpenko (SUBATECH Nantes) David Blaschke (University of Wroclaw) Dr Oleg Rogachevsky (JINR)

Presentation materials