328 citations · 2.5k across the 75 of their papers we have counts for
73 papers · 1 filter
The Be photodisintegration cross section within Cluster Effective Field Theory
Ylenia Capitani, Elena Filandri, Chen Ji +2
A low-energy calculation of Be photodisintegration cross section is presented within an cluster approach. The and contact interactions are derived from cluste…
Three-body model of He with non-local halo effective field theory potentials
E. C. Pinilla, W. Leidemann, G. Orlandini +1
We study the He Borromean nucleus in coordinate representation within a three-body model with two-body potentials derived from cluster effective field theory (EFT). These poten…
Beryllium-9 in Cluster Effective Field Theory
Elena Filandri, Paolo Andreatta, Carlo A. Manzata +3
We study the 9 Be ground-state energy with non-local n and potentials derived from Cluster Effective Field Theory. The short-distance dependence of the interaction is reg…
On calculating response functions via their Lorentz integral transforms
Victor D. Efros, Winfried Leidemann, Veronika Yu. Shalamova
The accuracy of reconstruction of a response function from its Lorentz integral transform is studied in an exactly solvable model. An inversion procedure is elaborated in detail an…
Relativistic effects in ab-initio electron-nucleus scattering
Noemi Rocco, Winfried Leidemann, Alessandro Lovato +1
The electromagnetic responses obtained from Green's function Monte Carlo (GFMC) calculations are based on realistic treatments of nuclear interactions and currents. The main limita…
Ab initio calculations for non-strange and strange few-baryon systems
Winfried Leidemann
Concerning the non-strange particle systems the low-energy excitation spectra of the three- and four-body helium isotopes are studied. Objects of the study are the astrophysical $S…
Benchmark Results for Few-Body Hypernuclei
F. Ferrari Ruffino, N. Barnea, S. Deflorian +4
The Non-Symmetrized Hyperspherical Harmonics method (NSHH) is introduced in the hypernuclear sector and benchmarked with three different ab-initio methods, namely the Auxiliary Fie…
Determination of S-factors with the LIT method
Winfried Leidemann, Sergio Deflorian, Victor D. Efros
The precise determination of astrophysical S-factors is essential for a detailed understanding of the nucleosynthesis in its various facets. It is discussed how the Lorentz integra…
Calculation of the astrophysical S-factor S_12 with the Lorentz integral transform
Sergio Deflorian, Victor D. Efros, Winfried Leidemann
The LIT approach is tested for the calculation of astrophysical S-factors. As an example the S-factor of the reaction 2H(p,gamma)3He is considered. It is discussed that a sufficien…
Is the isoscalar monopole resonance of the -particle a collective mode?
G. Orlandini, S. Bacca, N. Barnea +1
In this contribution we review and clarify the arguments which might allow the interpretation of the isoscalar monopole resonance of He as a collective breathing mode.
Energy Resolution with the Lorentz integral transform
Winfried Leidemann
A brief outline of the Lorentz Integral Transform (LIT) method is given. The method is well established and allows to treat reactions into the many-body continuum with bound-state…
Is the first excited state of the -particle a breathing mode?
Sonia Bacca, Nir Barnea, Winfried Leidemann +1
The isoscalar monopole excitation of 4He is studied within a few-body ab initio approach. We consider the transition density to the low-lying and narrow 0+ resonance, as well as va…
Theoretical study of the and reactions
Nir Nevo Dinur, Winfried Leidemann, Nir Barnea
{\it Ab initio} calculation of the total cross section for the reactions and is presented, using state-of-the-art nuclear for…
Nonsymmetrized hyperspherical harmonics with realistic NN potentials
Sergio Deflorian, Nir Barnea, Winfried Leidemann +1
The Schroedinger equation is solved for an A-nucleon system using an expansion of the wave function in nonsymmetrized hyperspherical harmonics. Our approach is both an extension an…
The isoscalar monopole resonance of the alpha particle: a prism to nuclear Hamiltonians
S. Bacca, N. Barnea, W. Leidemann +1
We present an ab-initio study of the isoscalar monopole excitations of 4He using different realistic nuclear interactions, including modern effective field theory potentials. In pa…
Modern Ab Initio Approaches and Applications in Few-Nucleon Physics with A \ge 4
Winfried Leidemann, Giuseppina Orlandini
We present an overview of the evolution of ab initio methods for few-nucleon systems with A \ge 4, tracing the progress made that today allows precision calculations for these syst…
Transverse electron scattering response function of 3He in the quasi-elastic peak region and beyond with Delta isobar degrees of freedom
Luping Yuan, Winfried Leidemann, Victor D. Efros +2
The 3He transverse electron scattering response function R_T(q,omega) is calculated in the quasi-elastic peak region and beyond for momentum transfers q = 500, 600 and 700 MeV/c. D…
Photon Scattering with the Lorentz Integral Transform Method
Giulia Bampa, Winfried Leidemann, H. Arenhövel
The application of the Lorentz integral transform (LIT) method to photon scattering off nuclei is presented in general. As an example, elastic photon scattering off the deuteron in…
Frame dependence of 3He transverse (e,e') response functions at intermediate momentum transfers
Victor D. Efros, Winfried Leidemann, Giuseppina Orlandini +1
The transverse electron scattering response function of 3He was recently studied by us in the quasi-elastic peak region for momentum transfers q between 500 and 700 MeV/c. Those re…
The effective interaction hyperspherical harmonics method for non-local potentials
G. Orlandini, N. Barnea, W. Leidemann
A different formulation of the effective interaction hyperspherical harmonics (EIHH) method, suitable for non-local potentials, is presented. The EIHH method for local interactions…
Transverse electron scattering response function of He with -isobar degrees of freedom
Luping Yuan, Victor D. Efros, Winfried Leidemann +1
A calculation of the He transverse inclusive response function, , which includes degrees of freedom is performed using the Lorentz integral transform method.…
How to increase the applicability of integral transform approaches in physics?
G Orlandini, W Leidemann, V D Efros +1
Integral transform approaches are numerous in many fields of physics, but in most cases limited to the use of the Laplace kernel. However, it is well known that the inversion of th…
Improved transverse (e,e') response function of 3He at intermediate momentum transfers
Victor D. Efros, Winfried Leidemann, Giuseppina Orlandini +1
The transverse electron scattering response function of 3He is studied in the quasi-elastic peak region for momentum transfers between 500 and 700 MeV/c. A conventional description…
Search for three-nucleon force effects on the longitudinal response function of 4He
Sonia Bacca, Nir Barnea, Winfried Leidemann +1
A detailed study of the 4He longitudinal response function R_L(ω,q) is performed at different kinematics, with particular emphasis on the role of three-nucleon forces. The effects…