Lambda production from anti-proton annihilation in nuclei

Ko, Che Ming; Yuan, Ruixi

doi:10.1016/0370-2693(87)91136-1

Cited by 29 publications

(16 citation statements)

References 10 publications

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“…Dynamics of the resulting hadronic matter is described by a relativistic transport model (ART) [16], which has been improved to include baryon-antibaryon production from meson-meson interactions and their annihilation using cross sections given in Ref. [17,18]. Also, the K * resonances are explicitly treated by including their production from pion-kaon and pion-rho scatterings [19] and the inverse reactions of decay and absorption.We first determine the parameters in the AMPT model by fitting the experimental data from central Pb+Pb collisions at center of mass energy of 17 AGeV [20].…”

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Charged particle rapidity distributions at relativistic energies

et al. 2001

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Using a multiphase transport model ͑AMPT͒, which includes both initial partonic and final hadronic interactions, we study the rapidity distributions of charged particles such as protons, antiprotons, pions, and kaons in heavy ion collisions at RHIC. The theoretical results for the total charged particle multiplicity at midrapidity are consistent with those measured by the PHOBOS Collaboration in central AuϩAu collisions at ͱsϭ56 and 130 A GeV. We find that these hadronic observables are much more sensitive to the hadronic interactions than to the partonic interactions. DOI: 10.1103/PhysRevC.64.011902 PACS number͑s͒: 25.75.Ϫq, 24.10.Lx Collisions of nuclei at high energies offer the possibility to subject nuclear matter to the extreme conditions of large compression and high excitation energies. Studies based on both nonequilibrium transport models ͓1͔ and equilibrium thermal models ͓2͔ have shown that the experimental data from heavy ion collisions at SIS, AGS, and SPS, where the center of mass collision energies are, respectively, about 3, 5, and 17 A GeV, are consistent with the formation of a hot dense nuclear matter in the initial stage of collisions. With the Relativistic Heavy Ion Collider ͑RHIC͒ at Brookhaven National Laboratory, which can reach a center-of-mass energy of 200A GeV, the initial energy density is expected to exceed that for the transition from the hadronic matter to the quark-gluon plasma. Experiments at RHIC thus provide the opportunity to recreate the matter which is believed to have existed during the first microsecond after the big bang and to study its properties.Recently, charged particle multiplicity near midrapidity has been measured in central AuϩAu collisions at ͱsϭ56and 130 A GeV at RHIC by the PHOBOS Collaboration ͓3͔. The observed charged particle density per participant is found to be compatible with the predictions of the HIJING model that includes particle production from minijets produced in hard-scattering processes ͓4͔. Although the HIJING model implements the parton energy loss via jet quenching ͓5͔, it does not include explicit interactions among minijet partons and the final-state interactions among hadrons. Other models have also been used to understand the data from the PHOBOS Collaboration. The LEXUS model ͓6͔, which is based on a linear extrapolation of ultrarelativistic nucleonnucleon scattering to nucleus-nucleus collisions, predicts too many charged particles compared with the PHOBOS data ͓7͔. On the other hand, the hadronic cascade model LUCIFER ͓8͔ predicts a charged particle multiplicity near midrapidity that is comparable to the PHOBOS data ͓9͔. In this Rapid Communication, we shall use a multiphase transport model ͑AMPT͒ ͓10͔, that includes both partonic and hadronic interactions, to study their effects not only on the total charged particle multiplicity but also on those of kaons, protons, and antiprotons. In the AMPT model, the initial conditions are obtained from the HIJING model ͓4͔ by using a Woods-Saxon radial shape for the colliding nuclei and in...

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Charged particle rapidity distributions at relativistic energies

et al. 2001

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“…In the afterburner part after kinetic freeze-out, the baryon-antibaryon annihilation has been taken into account in the HBT analysis [34], and used in the experimental studies of baryon-antibaryon correlations [53,54]. In the hadronic evolution described by the ART/AMPT model, the baryon-antibaryon annihilation cross sections are related to their branching ratios to different multipion states [20,55], and the inverse processes are incorporated by the detailed balance condition. It will be interesting to investigate the proton-antiproton correlation from the interplay of their mean-field potentials and annihilation effect in transport simulations.…”

Section: Hbt Correlations Of Protons Kaons and Antiprotonsmentioning

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Effects of hadronic mean-field potentials on Hanbury-Brown–Twiss correlations in relativistic heavy-ion collisions

Zhang

2017

Phys. Rev. C

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With the parameters fitted by the particle multiplicity, the energy density at chemical freezeout, and the charged particle elliptic flow, we have studied the effects of the hadronic mean-field potentials on the Hanbury-Brown and Twiss (HBT) correlation in relativistic heavy-ion collisions based on a multiphase transport model. The hadronic mean-field potentials are found to delay the emission time of the system and lead to large HBT radii extracted from the correlation function. Effects on the energy dependence of R 2 o − R 2 s and Ro/Rs as well as the eccentricity of the emission source are discussed. The HBT correlations can also be useful in understanding the mean-field potentials of protons, kaons, and antiprotons as well as baryon-antibaryon annihilations.

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“…The reaction dynamics induced by antiprotons is complicated and associated with the annihilation between antibaryon and baryon, charge-exchange reactions, elastic and inelastic collisions. To understand the nuclear dynamics induced by antiprotons, several approaches have been proposed, such as the intranuclear cascade (INC) model [13], kinetic approach [14], Giessen Boltzmann-Uehling-Uhlenbeck (GiBUU) transport model [15,16], Statistical Multifragmentation Model (SMM) [17] and the Lanzhou quantum molecular dynamics (LQMD) approach [18]. Antiproton-nucleus collisions provide the possibilities for studying the properties of hot nuclei, meson-nucleon interactions, formation of hypernucleus etc.…”

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confidence: 99%

Nuclear fragmentation induced by low-energy antiprotons within a microscopic transport approach

Feng

2016

Phys. Rev. C

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Within the framework of the Lanzhou quantum molecular dynamics (LQMD) transport model, the nuclear fragmentation induced by low-energy antiprotons has been investigated thoroughly. A coalescence approach is developed for constructing the primary fragments in phase space. The secondary decay process of the fragments is described by the well-known statistical code. It is found that the localized energy released in antibaryon-baryon annihilation is deposited in a nucleus mainly via pion-nucleon collisions, which leads to the emissions of pre-equilibrium particles, fission, evaporation of nucleons and light fragments etc. The strangeness exchange reactions dominate the hyperon production. The averaged mass loss increases with the mass number of target nucleus. A bump structure in the domain of intermediate mass for heavy targets appears owing to the contribution of fission fragments. PACS number(s): 25.43.+t, 24.10.Lx, 25.70.Pq

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Lambda production from anti-proton annihilation in nuclei

Cited by 29 publications

References 10 publications

Charged particle rapidity distributions at relativistic energies

Charged particle rapidity distributions at relativistic energies

Effects of hadronic mean-field potentials on Hanbury-Brown–Twiss correlations in relativistic heavy-ion collisions

Nuclear fragmentation induced by low-energy antiprotons within a microscopic transport approach

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