Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Gnech Alex"'
Autor:
Fornetti, Filippo, Gnech, Alex, Frederico, Tobias, Pederiva, Francesco, Rinaldi, Matteo, Roggero, Alessandro, Salme', Giovanni, Scopetta, Sergio, Viviani, Michele
The homogeneous Bethe-Salpeter equation (hBSE), describing a bound system in a genuinely relativistic quantum-field theory framework, was solved for the first time by using a D-Wave quantum annealer. After applying standard techniques of discretizati
Externí odkaz:
http://arxiv.org/abs/2406.18669
We compute ground-state and dynamical properties of $^4$He and $^{16}$O nuclei using as input high-resolution, phenomenological nucleon-nucleon and three-nucleon forces that are local in coordinate space. The nuclear Schr\"odinger equation for both n
Externí odkaz:
http://arxiv.org/abs/2405.14916
Publikováno v:
EPJ Web of Conferences, Vol 258, p 06007 (2022)
CP-violating interactions at quark level generate CP-violating nuclear interactions and currents, which could be revealed by looking at the presence of a permanent nuclear electric dipole moment. Within the framework of chiral effective field theory,
Externí odkaz:
https://doaj.org/article/df1b2ac088f44492aece4e9bcdd3820a
We compute the muon capture on deuteron in the doublet hyperfine state for a variety of nuclear interactions and consistent nuclear currents. Our analysis includes a detailed examination of the theoretical uncertainties coming from different sources:
Externí odkaz:
http://arxiv.org/abs/2305.07568
Autor:
Gnech, Alex, Schiavilla, Rocco
The five low-energy constants (LECs) in the electromagnetic current derived in chiral effective field theory ($\chi$EFT) up to one loop are determined by a simultaneous fit to the $A\,$=$\,2$--3 nuclei magnetic moments and to the deuteron magnetic fo
Externí odkaz:
http://arxiv.org/abs/2207.05528
Autor:
Gnech, Alex, Adams, Corey, Brawand, Nicholas, Carleo, Giuseppe, Lovato, Alessandro, Rocco, Noemi
The ground-breaking works of Weinberg have opened the way to calculations of atomic nuclei that are based on systematically improvable Hamiltonians. Solving the associated many-body Schr\"odinger equation involves non-trivial difficulties, due to the
Externí odkaz:
http://arxiv.org/abs/2108.06836
Autor:
Gnech, Alex
Standard Big Bang Nucleosynthesis (BBN) predicts the abundances of the light elements in the early universe. Even if the overall agreement with the experimental data is good, still some discrepancies exist on the relic abundances of ${}^7$Li and ${}^
Externí odkaz:
http://arxiv.org/abs/2012.08431
Publikováno v:
Phys. Rev. C 103, 012501 (2021)
Electric dipole moments of nuclei, diamagnetic atoms, and certain molecules are induced by CP-violating nuclear forces. Naive dimensional analysis predicts these forces to be dominated by long-range one-pion-exchange processes, with short-range force
Externí odkaz:
http://arxiv.org/abs/2007.04927
Publikováno v:
Phys. Rev. C 102, 014001 (2020)
We have studied the solution of the six-nucleon bound state problem using the hyperspherical harmonic (HH) approach. For this study we have considered only two-body nuclear forces. In particular we have used a chiral nuclear potential evolved with th
Externí odkaz:
http://arxiv.org/abs/2004.05814
Autor:
Gnech, Alex, Marcucci, Laura Elisa
We present a new calculation of the ${}^6{\rm Li}(p,\gamma){}^7{\rm Be}$ radiative capture astrophysical $S$-factor in a cluster model framework. We consider several intercluster potentials, adjusted to reproduce the ${}^7{\rm Be}$ bound state proper
Externí odkaz:
http://arxiv.org/abs/1902.05881