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Nonuniversal effects due to leading effective-range corrections are computed for the ground-state energy of the weakly-coupled repulsive Bose gas in two spatial dimensions. Using an effective field theory of contact interactions, these…

量子气体 · 物理学 2018-04-02 Silas R. Beane

Many-body correlations characterizing the Constrained Molecular Dynamics (CoMD)are analyzed in the case of finite and zero range effective microscopic interactions. The study begins by analyzing the case of infinite nuclear matter at zero…

核理论 · 物理学 2023-11-02 Massimo Papa

Important $E2$ contributions to the $(e,e^{\prime})$ cross sections of low-lying orbital $M1$ excitations are found in heavy deformed nuclei, arising from the small energy separation between the two excitations with $I^{\pi}K = 2^+1$ and…

核理论 · 物理学 2008-11-26 R. Nojarov , Amand Faessler , M. Dingfelder

The two-proton emission process $^3He(e,e'pp)n$ is theoretically investigated using realistic three-nucleon wave functions and taking the final state interaction into account by an approach which can be used when the value of the…

核理论 · 物理学 2009-11-07 C. Ciofi degli Atti , L. P. Kaptari

This paper presents a selected review of the (e,e'p) experimental program recently completed at the Jefferson Laboratory in the domain of high momentum transfer and high recoil momentum. Particular emphasis is put on the current…

核实验 · 物理学 2007-05-23 E. Voutier

An approximate many-body theory incorporating two-body correlations has been employed to calculate low-lying collective multipole frequencies in a Bose-Einstein condensate containing $A$ bosons, for different values of the interaction…

量子气体 · 物理学 2009-07-21 Anindya Biswas , Tapan Kumar Das

Nucleon transfer reactions in deuteron-deuteron collisions at energies above the three- and four-body breakup threshold are described using exact four-body equations for transition operators that are solved in the momentum-space framework.…

核理论 · 物理学 2017-06-05 A. Deltuva , A. C. Fonseca

We adopt a truncated version of two-body dynamics by neglecting three-body correlations, as is supported by microscopic numerical calculations. Introducing orthogonal channel correlations for the pp- and the ph-channel and integrating the…

核理论 · 物理学 2009-10-28 Alfred Pfitzner , Wolfgang Cassing , Andreas Peter

Quasi-elastic responses in nuclear matter and in $^{12}$C and $^{40}$Ca nuclei are calculated in ring approximation to investigate the finite size effects on the electromagnetic quasi-elastic responses. A method to simulate these effects in…

核理论 · 物理学 2008-11-26 E. Bauer , G. Co'

The missing mass spectrum measured in high resolution studies of the reaction pp -> K^+X is analyzed with respect to the strong final state interaction near the Lambda p production threshold. The observed spectrum can be described by…

核实验 · 物理学 2009-11-10 F. Hinterberger , A. Sibirtsev

Various electromagnetic few-body break-up reactions into the many-body continuum are calculated microscopically with the Lorentz integral transform (LIT) method. For three- and four-body nuclei the nuclear Hamiltonian includes two- and…

核理论 · 物理学 2008-11-26 W. Leidemann

The quantitative understanding of neutrino interactions with nuclei and nuclear matter is needed to the study of many different problems. In the astrophysics environment, neutrino-nucleon and neutrino-nucleus reaction rates are used as…

核理论 · 物理学 2009-01-19 Nicola Farina

Effects of nucleon-nucleon correlations on exclusive $(e,e'p)$ reactions on closed-shell nuclei leading to single-hole states are studied using $^{16}O(e,e'p)^{15}N$ ($6.32$ MeV, $3/2^-$) as an example. The quasi-hole wave function,…

核理论 · 物理学 2009-09-25 M. Radici , S. Boffi , Steven C. Pieper , V. R. Pandharipande

The differential cross sections of $pD\to ^3He X$ reactions, where $X=\eta, \ \eta'\ ,\omega, \ \phi $, are calculated on the basis of a two-step mechanism involving the subprocesses $pp\to d\pi ^+$ and $\pi^+n\to Xp $. It is shown that…

核理论 · 物理学 2008-02-03 L. A. Kondratyuk , Yu. N. Uzikov

We use the Paris nucleon-antinucleon optical potential for explanation of experimental data in the process $e^+e^- \to p\bar p$ near threshold. It is shown that the cross section and the electromagnetic form factors are very sensitive to…

核理论 · 物理学 2008-11-26 V. F. Dmitriev , A. I. Milstein

Electric dipole ($E1$) response of $^{6}$He is studied with a fully microscopic six-body calculation. The wave functions for the ground and excited states are expressed as a superposition of explicitly correlated Gaussians (CG). Final state…

核理论 · 物理学 2015-06-19 D. Mikami , W. Horiuchi , Y. Suzuki

We report the results of our {\it ab initio} relativistic many-body calculations of the electric dipole moment (EDM) $d_A$ arising from the electron-nucleus tensor-pseudotensor (T-PT) interaction, the interaction of the nuclear Schiff…

原子物理 · 物理学 2015-06-23 B. K. Sahoo , Yashpal Singh , B. P. Das

The triple differential cross sections for the 6Li(e,e'p) reaction have been measured in the excitation energy region from 27 to 46 MeV in a search for evidence of the giant dipole resonance (GDR) in 6Li. The cross sections have no distinct…

A model is presented to describe electromagnetically induced two-nucleon emission processes in a shell-model picture. Distortions in the outgoing nucleon waves are accounted for by performing a partial-wave expansion in a real mean-field…

核理论 · 物理学 2009-10-22 J. Ryckebusch , M. Vanderhaeghen , L. Machenil , M. Waroquier

Inclusive electromagnetic reactions in few-nucleon systems are studied basing on accurate three- and four-body calculations. The longitudinal 4He(e,e') response function obtained at q\le 600 MeV/c completely agrees with experiment. The…

核理论 · 物理学 2009-10-31 V. D. Efros , W. Leidemann , G. Orlandini , E. L. Tomusiak