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SUMMARY:FEATURES OF THE NON-EQUILIBRIUM QUANTUM HYDRODYNAMIC APPROACH FOR 
 DESCRIBING THE EMISSION OF SECONDARY PARTICLES IN COLLISIONS OF HEAVY IONS
  OF HIGH AND INTERMEDIATE ENERGIES
DTSTART;VALUE=DATE-TIME:20261029T140500Z
DTEND;VALUE=DATE-TIME:20261029T142000Z
DTSTAMP;VALUE=DATE-TIME:20261104T222816Z
UID:indico-contribution-6305@cern.ch
DESCRIPTION:Speakers: Alexander Dyachenko ()\nA.T. D’yachenko$^{1\,2}$\n
 \n$^1$B.P. Konstantinov Petersburg Nuclear Physics Institute\, National Re
 search Center "Kurchatov Institute"\, Gatchina\, Russia \n\n$^2$Emperor Al
 exander I Petersburg State Transport University\, St. Petersburg\, Russia\
 n\n  Based on the effective Klein–Fock–Gordon equation [1]\, a descrip
 tion is given of the emission of cumulative protons\, pions\, and fragment
 s (p\, π\, K\, d\, t) in heavy-ion collisions at energies of the U-70 acc
 elerator (IHEP\, Protvino) [2\,3]\, КI (Moscow) [4\,5]\, and the BM@N col
 laboration (JINR\, Dubna) [6-8]. The advantage of this approach in describ
 ing the experimental data of IHEP and KI for the emission of protons\, pio
 ns\, kaons\, and fragments of H\, $^2$H\, $^3$H\, $^3$He\, $^4$He\, $^6$Li
 \, $^7$Li\, compared to other theoretical models\, is shown. \n\nAn explan
 ation for the splitting effect in the momentum spectra of protons and ligh
 t fragments in the (230 MeV/A)$^{56}$Fe+$^9$Be→f+X reaction in the FRAGM
  (KI) experiment [9] is provided. This splitting is explained by the nucle
 on potential\, which depends quadratically on the distance from the partic
 le emission center. The spectrum splitting disappears with increasing ion 
 collision energy and upon transition to heavier fragments.\n\nWhen describ
 ing the available experimental data\, it is essential to identify the resu
 lting hot spot\, which is compatible with the hydrodynamic model of hot je
 t separation in heavy-ion collisions [10]\, and which has recently been de
 veloped in elementary particle physics [11].\n\n1.	D’yachenko A.T.\,  Ph
 ys. At. Nucl. $\\bf{87}$\, 646 (2024). \n2.	D’yachenko A.T.\,  Phys. At.
  Nucl. $\\bf{87}$\, 125 ( 2024).\n3.	D’yachenko A.T.\,  Phys. Part. Nucl
 . $\\bf{55}$\, 786 (2024).\n4.	D’yachenko A.T.\,  Mitropolsky I.A.\, Phy
 s. At. Nucl. $\\bf{85}$\, 1053 (2022).\n5.	D’yachenko A.T.\,  Phys. At. 
 Nucl. $\\bf{88}$\, 805 ( 2025).\n6.	D’yachenko A.T.\,  Phys. Part. Nucl.
  $\\bf{57}$\, 365 ( 2026).\n7.	D’yachenko A.T.\,  Phys. Part. Nucl. $\\b
 f{57}$\, 1018 ( 2026).\n8.	Afanasiev S. et al. BM@N Collaboration\, JHEP $
 \\bf{07}$\, 174 (2023).\n9.	Abramov B.M. et al. EPJ Web of Conferences $\\
 bf{204}$\, 03008 (2019).\n10.	Khangulyan V.A.\, Galitsky V.M.\, Ivanov Yu.
 B.\, JETP Lett\, $\\bf{33}$\, 484 (1981).\n11.	Blok R.\, Segev R.\, Strikm
 an M.\, Eur. Phys. J. C $\\bf{83}$\,:415 (2023)\n\nhttps://indico.particle
 .mephi.ru/event/626/contributions/6305/
LOCATION: Conference Hall 4
URL:https://indico.particle.mephi.ru/event/626/contributions/6305/
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