Zobrazeno 1 - 10
of 205
pro vyhledávání: '"Zoupanos, George"'
In the present work we present an extended description of the covariant noncommutative space, which accommodates the Fuzzy Gravity model constructed previously. It is based on the historical lesson that the use of larger algebras containing all gener
Externí odkaz:
http://arxiv.org/abs/2407.07044
We study four $SU(5) ~ N=1$ supersymmetric models which exhibit $S_3$ and/or $Z_N$ symmetries, that are finite to two or all loops, and their corresponding mass matrices. The first is an all-loop finite model based on an $S_3\times Z_3\times Z_2$ fla
Externí odkaz:
http://arxiv.org/abs/2406.17702
Based on the observation that the dimension of the tangent space is not necessarily equal to the dimension of the corresponding curved manifold and on the known fact that gravitational theories can be formulated in a gauge theoretic way, we discuss h
Externí odkaz:
http://arxiv.org/abs/2403.17511
We study the degrees of freedom of $R^2$ gravity in flat spacetime with two approaches. By rewriting the theory a la Stueckelberg, and implementing Lorentz-like gauges to the metric perturbations, we confirm that the pure theory propagates one scalar
Externí odkaz:
http://arxiv.org/abs/2311.08216
Publikováno v:
Fortschr. Phys. 2023, 2300226
In the gauge theoretic approach of gravity, General Relativity is described by gauging the symmetry of the tangent manifold in four dimensions. Usually the dimension of the tangent space is considered to be equal to the dimension of the curved manifo
Externí odkaz:
http://arxiv.org/abs/2309.15892
We examine an extension of the Standard Model which results from a $10D$, $\mathcal{N}=1$, $E_8$ gauge theory. The theory is dimensionally reduced over a $M_4 \times B_0/ \mathbf{Z}_3 $ space, where $B_0$ is the nearly-K\"ahler manifold $SU(3)/U(1) \
Externí odkaz:
http://arxiv.org/abs/2307.10014
Publikováno v:
J. High Energ. Phys. 2023, 168 (2023)
We study the metric perturbations around the de Sitter and Minkowski backgrounds in Conformal Gravity. We confirm the presence of ghosts in both cases. In the de Sitter case, by applying the Maldacena boundary conditions - the Neumann boundary condit
Externí odkaz:
http://arxiv.org/abs/2306.13714
Autor:
Manolakos, George, Manousselis, Pantelis, Roumelioti, Danai, Stefas, Stelios, Zoupanos, George
Publikováno v:
The European Physical Journal Special Topics (2023)
Here we present an overview on the various works, in which many collaborators have contributed, regarding the interesting dipole of noncommutativity and physics. In brief, we present the features that noncommutativity triggers both in the fields of g
Externí odkaz:
http://arxiv.org/abs/2305.11785
First we review Veltman's suggestion to attack the naturalness problem in the Standard model by requiring absence of quadratic divergences and the resulting mass formula. Then we emphasise the influence of Veltman's suggestion in strengthening the be
Externí odkaz:
http://arxiv.org/abs/2105.00235
Autor:
Heinemeyer, Sven, Kalinowski, Jan, Kotlarski, Wojciech, Mondragón, Myriam, Patellis, Gregory, Tracas, Nick, Zoupanos, George
The search for renormalization group invariant relations among parameters to all orders in perturbation theory constitutes the basis of the reduction of couplings concept. Reduction of couplings can be achieved in certain $N=1$ supersymmetric Grand U
Externí odkaz:
http://arxiv.org/abs/2011.07900