Zobrazeno 1 - 10
of 388
pro vyhledávání: '"Leidemann, W"'
We study the $^6$He Borromean nucleus in coordinate representation within a three-body model with two-body potentials derived from cluster effective field theory (EFT). These potentials are originally developed in momentum space and Fourier transform
Externí odkaz:
http://arxiv.org/abs/2409.03074
Autor:
Kegel, S., Achenbach, P., Bacca, S., Barnea, N., Bericic, J., Bosnar, D., Correa, L., Distler, M. O., Esser, A., Fonvieille, H., Friscic, I., Heilig, M., Herrmann, P., Hoek, M., Klag, P., Kolar, T., Leidemann, W., Merkel, H., Mihovilovic, M., Mueller, J., Mueller, U., Orlandini, G., Pochodzalla, J., Schlimme, B. S., Schoth, M., Sfienti, F. Schulz C., Sirca, S., Spreckels, R., Stoettinger, Y., Thiel, M., Tyukin, A., Walcher, T., Weber, A.
We perform a systematic study of the $\alpha$-particle excitation from its ground state $0_1^+$ to the $0_2^+$ resonance. The so-called monopole transition form factor is investigated via an electron scattering experiment in a broad $Q^2$-range (from
Externí odkaz:
http://arxiv.org/abs/2112.10582
We study the 9 Be ground-state energy with non-local ${\alpha}-$n and ${\alpha}-{\alpha}$ potentials derived from Cluster Effective Field Theory. The short-distance dependence of the interaction is regulated with a momentum cutoff. The potential para
Externí odkaz:
http://arxiv.org/abs/2002.00780
Autor:
Ruffino, F. Ferrari, Barnea, N., Deflorian, S., Leidemann, W., Lonardoni, D., Orlandini, G., Pederiva, F.
Publikováno v:
Few-Body Syst (2017) 58:113
The Non-Symmetrized Hyperspherical Harmonics method (NSHH) is introduced in the hypernuclear sector and benchmarked with three different ab-initio methods, namely the Auxiliary Field Diffusion Monte Carlo method, the Faddeev-Yakubovsky approach and t
Externí odkaz:
http://arxiv.org/abs/1701.06399
In this contribution we review and clarify the arguments which might allow the interpretation of the isoscalar monopole resonance of $^4$He as a collective breathing mode.
Comment: 5 pages, 3 figures, Proceedings of the 21st international confer
Comment: 5 pages, 3 figures, Proceedings of the 21st international confer
Externí odkaz:
http://arxiv.org/abs/1510.02248
Publikováno v:
Phys. Rev. Lett. 110, 042503 (2013)
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 particular we concentrate on the transition form factor $F_{\cal M}$ to
Externí odkaz:
http://arxiv.org/abs/1210.7255
Publikováno v:
J.Phys.Conf.Ser.312:092049,2011
A different formulation of the effective interaction hyperspherical harmonics (EIHH) method, suitable for non-local potentials, is presented. The EIHH method for local interactions is first shortly reviewed to point out the problems of an extension t
Externí odkaz:
http://arxiv.org/abs/1008.4492
Publikováno v:
J.Phys.G37:064011,2010
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 the Laplace transform is very problematic, so that the function related
Externí odkaz:
http://arxiv.org/abs/1002.2926
Publikováno v:
Few Body Syst.47:201-206,2010
The Lorentz integral transform method is briefly reviewed. The issue of the inversion of the transform, and in particular its ill-posedness, is addressed. It is pointed out that the mathematical term ill-posed is misleading and merely due to a histor
Externí odkaz:
http://arxiv.org/abs/0906.5421
Autor:
Leidemann, W.
Publikováno v:
Int.J.Mod.Phys.E18:1339-1358,2009
The LIT approach is reviewed both for inclusive and exclusive reactions. It is shown that the method reduces a continuum state problem to a bound-state-like problem, which then can be solved with typical bound-state techniques. The LIT approach opens
Externí odkaz:
http://arxiv.org/abs/0805.0483