Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Girlanda Luca"'
Publikováno v:
EPJ Web of Conferences, Vol 290, p 10008 (2023)
The deuteron, the only two-nucleon bound state, has a shallow character: its binding energy is strictly related to zero-energy parameters, the triplet scattering length 3anp and triplet effective range 3rnp. This fact places the deuteron inside the u
Externí odkaz:
https://doaj.org/article/34b590c16f6243eeab59881b4e96f1ef
In this paper we analyze the relativistic corrections to the leading order three-nucleon (3N) contact interactions. These boost corrections are derived first from the nonrelativistic reduction of covariant Lagrangians and later from the Poincar\'e al
Externí odkaz:
http://arxiv.org/abs/2308.13341
We study bosonic systems in the regime in which the two-body system has a shallow bound state or, equivalently, a large value of the two-body scattering length. Using the effective field theory framework as a guide, we construct a series of potential
Externí odkaz:
http://arxiv.org/abs/2206.06265
Publikováno v:
EPJ Web of Conferences, Vol 113, p 04009 (2016)
We report on our progress in the inclusion of the subleading 3N contact operators for the elastic p − d scattering below the deuteron break-up. We find that, with a nuclear interaction consisting of the AV18 2N potential, supplemented by the leadin
Externí odkaz:
https://doaj.org/article/845c80a5b20b4bea9c18be11477d5c11
Autor:
Piarulli, Maria, Girlanda, Luca, Schiavilla, Rocco, Kievsky, Alejandro, Lovato, Alessandro, Marcucci, Laura E., Pieper, Steven C., Viviani, Michele, Wiringa, Robert B.
Publikováno v:
Phys. Rev. C 94, 054007 (2016)
We present fully local versions of the minimally non-local nucleon-nucleon potentials constructed in a previous paper [M.\ Piarulli {\it et al.}, Phys.\ Rev.\ C {\bf 91}, 024003 (2015)], and use them in hypersperical-harmonics and quantum Monte Carlo
Externí odkaz:
http://arxiv.org/abs/1606.06335
Autor:
Girlanda, Luca
Publikováno v:
Am. J. Phys. 77 (2009) 854-857
We report on a determination of the Earth-Moon distance performed by students of an Italian high school, based on measurements of the time delay of the "echo" in the radio communications between Nasa mission control in Houston and the Apollo astronau
Externí odkaz:
http://arxiv.org/abs/0903.3367
Autor:
Girlanda, Luca
Publikováno v:
Phys.Rev.C77:067001,2008
It is shown that the number of independent operators in the nucleon-nucleon parity-violating contact Lagrangian at the leading order in the low-momentum expansion, can be reduced to five, by using Fierz rearrangements of the nucleon fields.
Comm
Comm
Externí odkaz:
http://arxiv.org/abs/0804.0772
Autor:
Girlanda, Luca
The two-flavor Gell-Mann-Oakes-Renner ratio is expressed in terms of low-energy pi-pi observables including the O(p^6) double chiral logarithms, computed in Generalized Chiral Perturbation Theory. It is found that their contribution is important and
Externí odkaz:
http://arxiv.org/abs/hep-ph/0007348
Autor:
Girlanda, Luca
Publikováno v:
Nucl.Phys.Proc.Suppl. 86 (2000) 207-210
The possibility of detecting the S-wave of the decays tau -> 3 pi + nu(tau) in the threshold region is explored, with emphasis on the sensitivity to the size of the quark antiquark condensate .
Comment: contribution to QCD99, 4 pages, Latex,
Comment: contribution to QCD99, 4 pages, Latex,
Externí odkaz:
http://arxiv.org/abs/hep-ph/9910538
Publikováno v:
JHEP 0001 (2000) 041
We argue that light quark loops produce a paramagnetic suppression of infrared-sensitive order parameters such as , as the number N_f of light fermions increases. The possibly strong dependence of on N_f is related to the observed Zweig rule
Externí odkaz:
http://arxiv.org/abs/hep-ph/9910537