Zobrazeno 1 - 10
of 184
pro vyhledávání: '"Herbert Weigel"'
Autor:
Herbert Weigel, Danial Saadatmand
Publikováno v:
Universe, Vol 10, Iss 1, p 13 (2023)
We study the back-reaction of fermion fields on the kink solution in one space and one time dimension. We employ a variational procedure to determine an upper limit for the minimum of the total energy. This energy has three contributions: the classic
Externí odkaz:
https://doaj.org/article/287edd8024744bed83c47b1241c7027a
Autor:
Herbert Weigel, Ishmael Takyi
Publikováno v:
Symmetry, Vol 13, Iss 1, p 108 (2021)
We outline and review the computations of polarized and unpolarized nucleon structure functions within the bosonized Nambu-Jona-Lasinio chiral soliton model. We focus on a consistent regularization prescription for the Dirac sea contribution and pres
Externí odkaz:
https://doaj.org/article/2a8f3bc4cfc04d1996d16ed09afc692e
Autor:
Herbert Weigel
Publikováno v:
Universe, Vol 4, Iss 12, p 142 (2018)
We cautiously review the treatment of pentaquark exotic baryons in chiral soliton models. We consider two examples and argue that any consistent and self-contained description must go beyond the mean field approximation that only considers the classi
Externí odkaz:
https://doaj.org/article/a7440cf525314976a3c6027fcf143303
Autor:
Danial Saadatmand, Herbert Weigel
Publikováno v:
Physical Review
We study quantum effects of recently discovered kink solitons which are constructed self-consistently by coupling to a single, excited fermion bound state. Our studies are based on the observation that in a semi-classical expansion the energies of th
Autor:
Herbert Weigel, Ishmael Takyi
Publikováno v:
Physical Review
We compute the vacuum polarization energies (VPE) of solitons in a self-dual impurity model in which the soliton profiles take the shape of a separated kink-antikink pair. Classically the soliton energies are invariant under the change of a continuou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15e7b2dbefb7f9aeec615a923a5cf7c2
Autor:
Herbert Weigel, Noah Graham
Publikováno v:
Physical Review
We compute the one-loop vacuum polarization energies of Abrikosov-Nielsen-Olesen (ANO) vortices with topological charge $n$ in scalar electrodynamics, for the BPS case of equal gauge and scalar masses. This calculation allows us to investigate the re
Autor:
Ishmael Takyi, Herbert Weigel
Publikováno v:
Symmetry, Vol 13, Iss 108, p 108 (2021)
We outline and review the computations of polarized and unpolarized nucleon structure functions within the bosonized Nambu-Jona-Lasinio chiral soliton model. We focus on a consistent regularization prescription for the Dirac sea contribution and pres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5834bd92dbc0a09e67f735118695009d
http://arxiv.org/abs/2101.02114
http://arxiv.org/abs/2101.02114
Publikováno v:
Physical Review
We compute the vacuum polarization energy of kink solitons in the $\phi^{8}$ model in one space and one time dimensions. There are three possible field potentials that have eight powers of $\phi$ and that possess kink solitons. For these different fi
Autor:
Noah Graham, Herbert Weigel
Publikováno v:
Physics Letters
We compute the vacuum polarization energy of soliton configurations in a model with two scalar fields in one space dimension using spectral methods. The second field represents an extension of the conventional $\phi^4$ kink soliton model. We find tha
Autor:
Herbert Weigel
Publikováno v:
Russian Physics Journal. 59:1768-1774
We compute fermion quantum corrections to the energy of cosmic strings. A number of rather technical tools is needed to formulate this correction and we employ isospin and gauge invariance to verify consistency of these tools. These corrections must