Constraining nucleon high momentum in nuclei

Yong, Gao‐Chan

doi:10.1016/j.physletb.2016.12.013

Cited by 30 publications

(32 citation statements)

References 66 publications

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“…The neutron and proton density distributions in nucleus are given by the Skyrme-Hartree-Fock with Skyrme M * force parameters [37]. In initialization of colliding nuclei, the proton and neutron momentum distributions with high-momentum tails are employed [35,36,[38][39][40]. The isospin-and momentum-dependent single nucleon mean-field potential reads…”

Section: Model and Methodsmentioning

confidence: 99%

High pt squeezed-out n/p ratio as a probe of Ksym of the symmetry energy

Guo

Yong

2019

Phys. Rev. C

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By involving the constraints of the slope of nuclear symmetry energy L into the question of determination of the high-density symmetry energy, one needs to probe the curvature of nuclear symmetry energy Ksym. Based on the Isospin-dependent Boltzmann-Uehling-Uhlenbeck (IBUU) transport model, effects of the curvature of nuclear symmetry energy on the squeezed-out nucleons are demonstrated in the semi-central Au+Au reaction at 400 and 600 MeV/nucleon. It is shown that the squeezed-out isospin-dependent nucleon emissions at high transverse momenta are sensitive to the curvature of nuclear symmetry energy. The curvature of nuclear symmetry energy at saturation density thus can be determined by the high momentum squeezed-out isospin-dependent nucleon emissions experiments from the semi-central Au+Au reaction at 400 or 600 MeV/nucleon.

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Section: Model and Methodsmentioning

confidence: 99%

High pt squeezed-out n/p ratio as a probe of Ksym of the symmetry energy

Guo

Yong

2019

Phys. Rev. C

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“…In the used IBUU model, nucleon spatial distribution in initial colliding nuclei is given by [11,23]…”

Section: The Initialization Of Nucleon Momentum and The Transportmentioning

confidence: 99%

Effects of the initialization of nucleon momentum in heavy-ion collisions at medium energies

et al. 2018

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Based on the Isospin-dependent transport model Boltzmann-Uehling-Uhlenbeck (IBUU), effects of the difference of the high momentum tails (HMTs) of nucleon momentum distribution in colliding nuclei on some isospin-sensitive observables are studied in the 197 Au + 197 Au reactions at incident beam energy of 400 MeV/nucleon. It is found that the nucleon transverse and elliptic flows, the free neutron to proton ratio at low momenta are all less sensitive to the specific form of the HMT, while the free neutron to proton ratio at high momenta and the yields of π − and π + as well as the π − /π + ratio around the Coulomb peak are sensitive to the specific form of the HMT. Combining the present studies with the experimental measurements at rare-isotope reaction facilities worldwide, one may get more insights into the nuclear short-range correlations in heavy nuclei or nuclear matter.

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“…[26,27]. For example, properties of the short-range tensor force and ramifications of the HMT on the Equation of State (EOS) of neutron-rich matter [28][29][30][31][32], especially the density dependence of nuclear symmetry energy E sym (ρ) are still poorly known. The E sym (ρ) encodes information about the isospin dependence of nuclear EOS, it is measured in the so-called parabolic approximation of the EOS by the change in single nucleonic energy when all protons are replaced by neutrons [33].…”

Section: Introductionmentioning

confidence: 99%

Interplay of short-range correlations and nuclear symmetry energy in hard-photon production from heavy-ion reactions at Fermi energies

Yong

2017

Phys. Rev. C

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Within an isospin-and momentum-dependent transport model for nuclear reactions at intermediate energies, we investigate the interplay of the nucleon-nucleon short-range correlations (SRC) and nuclear symmetry energy Esym(ρ) on hard photon spectra in collisions of several Ca isotopes on 112 Sn and 124 Sn targets at a beam energy of 45 MeV/nucleon. It is found that over the whole spectra of hard photons studied, effects of the SRC overwhelm those due to the Esym(ρ). The energetic photons come mostly from the high-momentum tails (HMT) of single-nucleon momentum distributions in the target and projectile. Within the neutron-proton dominance model of SRC based on the consideration that the tensor force acts mostly in the isosinglet and spin-triplet nucleon-nucleon interaction channel, there are equal numbers of neutrons and protons, thus a zero isospin-asymmetry in the HMTs. Therefore, experimental measurements of the energetic photons from heavy-ion collisions at Fermi energies have the great potential to help us better understand the nature of SRC without any appreciable influence by the uncertain Esym(ρ). These measurements will be complementary to but also have some advantages over the ongoing and planned experiments using hadronic messengers from reactions induced by high-energy electrons or protons. Since the underlying physics of SRC and Esym(ρ) are closely correlated, a better understanding of the SRC will in turn help constrain the nuclear symmetry energy more precisely in a broad density range.

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Constraining nucleon high momentum in nuclei

Cited by 30 publications

References 66 publications

High pt squeezed-out n/p ratio as a probe of Ksym of the symmetry energy

High pt squeezed-out n/p ratio as a probe of Ksym of the symmetry energy

Effects of the initialization of nucleon momentum in heavy-ion collisions at medium energies

Interplay of short-range correlations and nuclear symmetry energy in hard-photon production from heavy-ion reactions at Fermi energies

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