3 papers
nucl-th2025
Calculation of low-energy scattering parameters using artificial oscillator trap
D. V. Fedorov, A. M. Pedersen
We introduce a recipe to estimate the low-energy scattering parameters of a quantum few-body system - scattering length, effective range, and shape parameter - by using only discre…
nucl-th2024
Explicitly correlated Gaussians with tensor pre-factors: analytic matrix elements
D. V. Fedorov, A. F. Teilmann, M. C. Østerlund +1
We consider a specific form of explicitly correlated Gaussians -- with tensor pre-factors -- which appear naturally when dealing with certain few-body systems in nuclear and partic…
nucl-th2024
The N(1440) Roper resonance in the nuclear model with explicit mesons
D. V. Fedorov
We show that the N(1440) Roper resonance naturally appears in the nuclear model with explicit mesons as a structure in the continuum spectrum of the physical proton which in this c…