Deuteron production and elliptic flow in relativistic heavy ion collisions

Abstract

The hadronic transport model ART is extended to include the production and annihilation of deuterons via the reactions BB ↔ dM, where B and M stand for baryons and mesons, respectively, as well as their elastic scattering with mesons and baryons in the hadronic matter. This new hadronic transport model is used to study the transverse momentum spectrum and elliptic flow of deuterons in relativistic heavy ion collisions, with the initial hadron distributions after hadronization of the produced quark-gluon plasma taken from a blast wave model. The results are compared with those measured by the PHENIX and STAR Collaborations for Au + Au collisions at √ s NN = 200 GeV and also with those obtained from the coalescence model based on freeze-out nucleons in the transport model.

Origin of the mass splitting of elliptic anisotropy in a multiphase transport model

“…, Ω baryons and antibaryons [26], plus deuterons and anti-deuterons [34]. We terminate the hadronic interactions at a cutoff time, when the observables of interest are stable; a cutoff time of 30 fm/c is used.…”

AntimatterHΛ4hypernucleus production and theHΛ3Sun1, Chen2 2016Phys. Rev. C271170View full textAdd to dashboardCite

“…It is interesting to note that the Λ freezeout temperature is slightly higher at RHIC than at LHC. For FOAu-Λ * and FOPb-Λ * , we have neglected final state interactions of the produced 3 Λ H during the last 2 ∼ 3 fm/c time interval when some nucleons have not yet frozen out, and probably this can be justified from the transport model study which indicates including the final state interactions changes the deuteron yield by only about 20% at RHIC [36]. On the other hand, since 3 Λ H is an even more loosely bound system than deuteron (Note the total binding energy of , nicely reproducing the measured central values.…”

Light (anti-)nuclei production and flow in relativistic heavy-ion collisions

“…In the present study, we generalize the study of Ref. [22] to include the production of not only deuteron but also triton, helium 3, hypertriton, and hyperhelium 3 as well as their antinuclei from the coalescence model using the phase-space distribution of protons, neutrons, Lambdas and their antiprticles at freeze out from the AMPT model in both its default and string melting versions. We specifically study the transverse momentum spectra and elliptic flows of these nuclei for Pb+Pb collisions at √ s N N = 2.76 TeV as studied in the experiments by the ALICE Collaboration.…”

“…Also, the study of deuteron production in heavy ion collisions at RHIC was studied in Ref. [22] based on a multiphase transport (AMPT) model. Both the coalescence model based on the phasespace distributions of protons and neutrons at freeze out and a dynamic model that includes deuteron production and annihilation via N N ↔ πd in the hadronic stage of AMPT have been used.…”