Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Nikos Irges"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 5, Pp 1-5 (2023)
Abstract Using arguments from holography we propose that the deviation of the cosmological spectral index $$n_S$$ n S of scalar fluctuations from unity may be controlled almost entirely by the critical exponent $$\eta $$ η of the $$d=3$$ d = 3 Ising
Externí odkaz:
https://doaj.org/article/d258f6112653435c80ca6e32a2f11180
Publikováno v:
Universe, Vol 9, Iss 10, p 434 (2023)
We consider a real scalar field in de Sitter background and compute its thermal propagators. We propose that in a dS/CFT context, nontrivial thermal effects as seen by an ‘out’ observer can be encoded in the anomalous dimensions of the d=3 Ising
Externí odkaz:
https://doaj.org/article/920fbc5339ac49fd9db4c16e7737fa01
Autor:
Nikos Irges, Fotis Koutroulis
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 2, Pp 1-44 (2021)
Abstract We construct the zero temperature (no compact dimensions) effective action for an SU(2) Yang–Mills theory in five dimensions, with boundary conditions that reduce the symmetry on the four-dimensional boundary located at the origin to a U(1
Externí odkaz:
https://doaj.org/article/d9fc862216ba4ea1b66252d266676685
Autor:
Nikos Irges, Fotis Koutroulis
Publikováno v:
Nuclear Physics B, Vol 950, Iss , Pp - (2020)
Generalized Effective Field Theory (GEFT) is the non-renormalizable extension of an Effective Field Theory where the Wilson coefficients are endowed by their own, independent scale dependence. Such an effective theory can be constructed by quantizing
Externí odkaz:
https://doaj.org/article/ca5aaee0cd8a4056a95f395fa81ade1b
Autor:
Nikos Irges, Fotis Koutroulis
Publikováno v:
Nuclear Physics B, Vol 937, Iss , Pp 135-195 (2018)
We initiate the continuum description of a non-perturbative 5d lattice Yang–Mills model with 4d boundaries using the ε-expansion. In its simplest version classically the bulk has an SU(2) gauge symmetry and on the boundary there is an Abelian–Hi
Externí odkaz:
https://doaj.org/article/6cfc7f2ddc7f443c812895d9cba345aa
Autor:
Nikos Irges, Fotis Koutroulis
Publikováno v:
Nuclear Physics B, Vol 924, Iss C, Pp 178-278 (2017)
We perform an old school, one-loop renormalization of the Abelian–Higgs model in the Unitary and Rξ gauges, focused on the scalar potential and the gauge boson mass. Our goal is to demonstrate in this simple context the validity of the Unitary gau
Externí odkaz:
https://doaj.org/article/270c37b4d2764f539b59902ab3ea8680
Publikováno v:
Frontiers in Physics, Vol 7 (2019)
Here, we review a class of models which generalize the traditional Peccei-Quinn (PQ) axion solution by a Stückelberg pseudoscalar. Such axion models represent a significant variant with respect to earlier scenarios, where axion fields were associate
Externí odkaz:
https://doaj.org/article/547c4f61067b4aeaa2f78773c6aec0cc
Autor:
Nikos Irges, Fotis Koutroulis
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 2, Pp 1-44 (2021)
European Physical Journal
European Physical Journal
We construct the zero temperature (no compact dimensions) effective action for an SU(2) Yang-Mills theory in five dimensions, with boundary conditions that reduce the symmetry on the four-dimensional boundary located at the origin to a U(1)-complex s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a968ca5238a852ad5a1f42de021920ff
http://arxiv.org/abs/2008.03981
http://arxiv.org/abs/2008.03981
Autor:
Nikos Irges
Publikováno v:
Proceedings of Corfu Summer Institute 2017 "Schools and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2017).
We make a few general comments on the Renormalization Group flows in certain Yang-Mills theories in the vicinity of phase transitions. We then present a model in d=5 with non-periodic boundary conditions where a possible RG flow starts from the trivi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08858cc844b51d53d8a72f9058255515
https://doi.org/10.22323/1.318.0080
https://doi.org/10.22323/1.318.0080
Autor:
Fotis Koutroulis, Nikos Irges
Publikováno v:
Nuclear Physics B, Vol 937, Iss, Pp 135-195 (2018)
Nuclear Physics
Nuclear Physics
We initiate the continuum description of a non-perturbative 5d lattice Yang-Mills model with 4d boundaries using the $\varepsilon$-expansion. In its simplest version classically the bulk has an $SU(2)$ gauge symmetry and on the boundary there is an A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16771df39a7f52f0c77cf208a1d40a39
http://arxiv.org/abs/1804.06306
http://arxiv.org/abs/1804.06306