Publication:
Classical excluded volume of loosely bound light (anti) nuclei and their chemical freeze-out in heavy ion collisions

Дата
2020
Авторы
Grinyuk, B. E.
Bugaev, K. A.
Sagun, V. V.
Ivanytskyi, O. I.
Blaschke, D. B.
Taranenko, A. V.
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Научные группы
Организационные подразделения
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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
Выпуск журнала
Аннотация
From the analysis of light (anti)nuclei multiplicities that were measured recently by the ALICE collaboration in Pb+Pb collisions at the center-of-mass collision energy root sNN = 2.76TeV, there arose a highly nontrivial question about the excluded volume of composite particles. Surprisingly, the hadron resonance gas model (HRGM) is able to perfectly describe the light (anti) nuclei multiplicities under various assumptions. Thus, one can consider the (anti)nuclei with a vanishing hard-core radius (as the point-like particles) or with the hard-core radius of proton, but the fit quality is the same for these assumptions. It is clear, however, that such assumptions are unphysical. Hence we obtain a formula for the classical excluded volume of loosely bound light nuclei consisting of A baryons. To implement a new formula into the HRGM, we have to modify the induced surface tension concept to treat the hadrons and (anti)nuclei on the same footing. We perform a thorough analysis of hadronic and (anti)nuclei multiplicities measured by the ALICE collaboration. The HRGM with the induced surface tension allows us to verify different assumptions on the values of hard-core radii and different scenarios of chemical freeze-out of (anti)nuclei. It is shown that the unprecedentedly high quality of fit chi(2)(tot)/dof similar or equal to 0.724 is achieved, if the chemical freeze-out temperature of hadrons is about T-h = 150MeV, while the one for all (anti)nuclei is T-A = 174-175.2MeV.
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Цитирование
Classical excluded volume of loosely bound light (anti) nuclei and their chemical freeze-out in heavy ion collisions / Grinyuk, BE [et al.] // International Journal of Modern Physics E. - 2020. - 29. - № 11. - 10.1142/S0218301320400091
URI
https://www.doi.org/10.1142/S0218301320400091
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85098240270&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000612956600003
 https://openrepository.mephi.ru/handle/123456789/23112
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