Exploring binding energy and separation energy dependences of HBT strength

Wei, Yongzhuang; Ma, Yugang; Shen, W. Q.; Ma, Guoliang; Wang, Kehuan; Cai, X. Z.; Chen, Zhong; Guo, Weihua; Chen, J.G.

doi:10.1016/j.physletb.2004.02.021

Cited by 29 publications

(26 citation statements)

References 48 publications

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“…The geometry of the system shall undergo phase space evolution from QGP stage to hadron kinetic freeze-out stage, which can be considered as an observable that is sensitive to the equation of state [16,17]. Hanbury-Brown-Twiss (HBT) technique invented for measuring sizes of nearby stars [18] was extended to particle physics [19] and heavy-ion collisions [20][21][22][23][24][25][26][27]. The HBT technique can also be applied to extract the precise space-time properties from particle emission region at kinetic freeze-out stage in heavy-ion collisions.…”

Section: Introductionmentioning

confidence: 99%

Beam Energy Dependence of Hanbury-Brown-Twiss Radii from a Blast-Wave Model

Song

Chen

et al. 2016

Advances in High Energy Physics

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The beam energy dependence of correlation lengths (the Hanbury-Brown-Twiss radii) is calculated by using a blast-wave model and the results are comparable with those from RHIC-STAR beam energy scan data as well as the LHC-ALICE measurements. A set of parameters for the blast-wave model as a function of beam energy under study are obtained by fit to the HBT radii at each energy point. The transverse momentum dependence of HBT radii is presented with the extracted parameters for Au+Au collision at √ NN = 200 GeV and for Pb+Pb collisions at 2.76 TeV. From our study one can learn that particle emission duration cannot be ignored while calculating the HBT radii with the same parameters. And tuning kinetic freeze-out temperature in a range will result in system lifetime changing in the reverse direction as it is found in RHIC-STAR experiment measurements.

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Section: Introductionmentioning

confidence: 99%

Beam Energy Dependence of Hanbury-Brown-Twiss Radii from a Blast-Wave Model

Song

Chen

et al. 2016

Advances in High Energy Physics

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“…The approach of HBT with IDQMD has been applied in reproducing the halo neutronhalo neutron correlation function of HBT results in IDQMD [31]. In our work [31], the nucleons are defined as emitted if they do not belong to any clusters (A ≥ 2) which are recognized by a simple coalescence model: i.e.…”

Section: Resultsmentioning

confidence: 99%

Systematic studies of binding energy dependence of neutron–proton momentum correlation function

Wei¹,

G.²,

Shen³

et al. 2004

J. Phys. G: Nucl. Part. Phys.

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Abstract. Hanbury Brown-Twiss (HBT) results of the neutron-proton correlation function have been systematically investigated for a series nuclear reactions with light projectiles with help of Isospin-Dependent Quantum Molecular Dynamics model. The relationship between the binding energy per nucleon of the projectiles and the strength of the neutron-proton HBT at small relative momentum has been obtained. Results show that neutron-proton HBT results are sensitive to the binding energy per nucleon.

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“…Like in the original QMD model [30] and in various modern versions of QMD models [47][48][49][50][51][52][53][54], a trial wave function for a nucleus in the ImQMD model [55][56][57][58][59] is restricted within a parameter space {r j , p j }, where r j and p j are mean values of position and momentum operators of the jth nucleon expressed by a Gaussian wave packet, and the total wave function is a direct product of these wave functions of Gaussian form. With the aid of a Wigner transformation, a nucleus composed of distinguishable N nucleons is characterized by the following one-body phase space distribution function,…”

Section: A Imqmdmentioning

confidence: 99%

Energy dependence of the nucleus-nucleus potential and the friction parameter in fusion reactions

Wen

Sakata

et al. 2014

Phys. Rev. C

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Applying a macroscopic reduction procedure on the improved quantum molecular dynamics (ImQMD) model, the energy dependences of the nucleus-nucleus potential, the friction parameter, and the random force characterizing a one-dimensional Langevin-type description of the heavy-ion fusion process are investigated. Systematic calculations with the ImQMD model show that the fluctuation-dissipation relation found in the symmetric head-on fusion reactions at energies just above the Coulomb barrier fades out when the incident energy increases. It turns out that this dynamical change with increasing incident energy is caused by a specific behavior of the friction parameter which directly depends on the microscopic dynamical process, i.e., on how the collective energy of the relative motion is transferred into the intrinsic excitation energy. It is shown microscopically that the energy dissipation in the fusion process is governed by two mechanisms: One is caused by the nucleon exchanges between two fusing nuclei, and the other is due to a rearrangement of nucleons in the intrinsic system. The former mechanism monotonically increases the dissipative energy and shows a weak dependence on the incident energy, while the latter depends on both the relative distance between two fusing nuclei and the incident energy. It is shown that the latter mechanism is responsible for the energy dependence of the fusion potential and explains the fading out of the fluctuation-dissipation relation.

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Exploring binding energy and separation energy dependences of HBT strength

Cited by 29 publications

References 48 publications

Beam Energy Dependence of Hanbury-Brown-Twiss Radii from a Blast-Wave Model

Beam Energy Dependence of Hanbury-Brown-Twiss Radii from a Blast-Wave Model

Systematic studies of binding energy dependence of neutron–proton momentum correlation function

Energy dependence of the nucleus-nucleus potential and the friction parameter in fusion reactions

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