Электронный каталог

Статья

Abdulhamid, M.I.
Beam Energy Dependent of Triton Production and Yield Ratio (N&sub(t) x N&sub(p)/N*2&sub(d)) in Au+Au Collisions at RHIC / M.I.Abdulhamid, G.Agakishiev, A.Aitbaev, A.Aparin, G.S.Averichev, T.G.Dedovich, A.Kechechyan, A.A.Korobitsin, R.Lednicky, V.B.Luong, A.Mudrokh, Y.Panebratsev, O.V.Rogachevsky, E.Shahaliev, M.Tokarev, S.Vokal, [a.o.] // Physical Review Letters [Electronic resource]. – 2023. – Vol.130, No.20. – P.202301. – URL: https://doi.org/10.1103/PhysRevLett.130.202301. – Bibliogr.:100.

We report the triton (t) production in midrapidity (|y|<0.5) Au+Au collisions at √sNN=7.7–200  GeV measured by the STAR experiment from the first phase of the beam energy scan at the Relativistic Heavy Ion Collider. The nuclear compound yield ratio (Nt×Np/N2d), which is predicted to be sensitive to the fluctuation of local neutron density, is observed to decrease monotonically with increasing charged-particle multiplicity (dNch/dη) and follows a scaling behavior. The dNch/dη dependence of the yield ratio is compared to calculations from coalescence and thermal models. Enhancements in the yield ratios relative to the coalescence baseline are observed in the 0%-10% most central collisions at 19.6 and 27 GeV, with a significance of 2.3σ and 3.4σ, respectively, giving a combined significance of 4.1σ. The enhancements are not observed in peripheral collisions or model calculations without critical fluctuation, and decreases with a smaller pT acceptance. The physics implications of these results on the QCD phase structure and the production mechanism of light nuclei in heavy-ion collisions are discussed.



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 343 е2 - Взаимодействие релятивистских ядер с ядрами
Бюллетени = 46/023