Zobrazeno 1 - 10
of 171
pro vyhledávání: '"Holger Gies"'
Autor:
Holger Gies, Kevin K. K. Tam
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 5, Pp 1-8 (2024)
Abstract We test the physical viability of a recent proposal for an asymptotically safe modification of quantum electrodynamics (QED), whose ultraviolet physics is dominated by a non-perturbative Pauli spin-field coupling. We focus in particular on i
Externí odkaz:
https://doaj.org/article/316ef90a2c334768b2663eaaac10d2d9
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 10, Pp 1-12 (2023)
Abstract We explore the fixed-point structure of QED-like theories upon the inclusion of a Pauli spin-field coupling. We concentrate on the fate of UV-stable fixed points recently discovered in $$d=4$$ d = 4 spacetime dimensions upon generalizations
Externí odkaz:
https://doaj.org/article/4c7c07ac0c2d40a48b1afa797769a57b
Publikováno v:
Physical Review Research, Vol 5, Iss 4, p L042036 (2023)
We implement the equation of motion of the large-N Gross-Neveu model from strong-interaction physics in photonic waveguide arrays and study one of its paradigmatic multifermion bound-state solutions in an optical experiment. The present study constit
Externí odkaz:
https://doaj.org/article/91a838c7d7f04beca4559419df301524
Autor:
Holger Gies, Abdol Sabor Salek
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 2, Pp 1-12 (2023)
Abstract We study the renormalization flow of Hilbert–Palatini gravity to lowest non-trivial order. We find evidence for an asymptotically safe high-energy completion based on the existence of an ultraviolet fixed point similar to the Reuter fixed
Externí odkaz:
https://doaj.org/article/5e3aaa2245e0482895ed5ee5d339786a
Autor:
Holger Gies, Jobst Ziebell
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 7, Pp 1-14 (2020)
Abstract High-energy completeness of quantum electrodynamics (QED) can be induced by an interacting ultraviolet fixed point of the renormalization flow. We provide evidence for the existence of two of such fixed points in the subspace spanned by the
Externí odkaz:
https://doaj.org/article/6ada351bbaba486faefad8f80b6f1e26
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 6, Pp 1-32 (2019)
Abstract Recent studies have provided evidence for the existence of new asymptotically free trajectories in non-Abelian particle models without asymptotic symmetry in the high-energy limit. We extend these results to a general $$\mathrm {SU}(N_{\math
Externí odkaz:
https://doaj.org/article/d65805b290ca4990810d26b336df1962
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 2, Pp 1-27 (2019)
Abstract $$\mathbb {Z}_2$$ Z2 -Yukawa-QCD models are a minimalistic model class with a Yukawa and a QCD-like gauge sector that exhibits a regime with asymptotic freedom in all its marginal couplings in standard perturbation theory. We discover the ex
Externí odkaz:
https://doaj.org/article/6edb1d97da1a4968a5b0dfa97521753b
Autor:
Alfio Bonanno, Astrid Eichhorn, Holger Gies, Jan M. Pawlowski, Roberto Percacci, Martin Reuter, Frank Saueressig, Gian Paolo Vacca
Publikováno v:
Frontiers in Physics, Vol 8 (2020)
Asymptotic safety is a theoretical proposal for the ultraviolet completion of quantum field theories, in particular for quantum gravity. Significant progress on this program has led to a first characterization of the Reuter fixed point. Further advan
Externí odkaz:
https://doaj.org/article/8b67c035d8f44a86b846bac9d070753e
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 12, Pp 1-30 (2017)
Abstract We investigate the emergence of N $$ \mathcal{N} $$ = 1 supersymmetry in the long-range behavior of three-dimensional parity-symmetric Yukawa systems. We discuss a renormalization approach that manifestly preserves supersymmetry whenever suc
Externí odkaz:
https://doaj.org/article/8ded430103e34b149928103145236fd0
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 11, Pp 1-19 (2017)
Abstract We investigate the impact of operators of higher canonical dimension on the lower Higgs-mass consistency bound by means of generalized Higgs–Yukawa interactions. Analogously to higher-order operators in the bare Higgs potential in an effec
Externí odkaz:
https://doaj.org/article/1dc769895269428ba6d96a4031240ebb