Results 51 to 60 of about 3,111,277 (372)
Systematic classification of aGUT models in five dimensions: the SU(N) kinship
Journal of High Energy Physics, 2023 Asymptotic Grand Unification theories (aGUTs) in five dimensions provide a valid alternative to standard quantitative unification. We define the pathway towards viable models starting from a general unified bulk gauge symmetry.
Giacomo Cacciapaglia
doaj +1 more source
Compact extra dimensions as the source of primordial black holes
Frontiers in Astronomy and Space Sciences, 2022 This article discusses a model of primordial black hole (PBH) formation at the reheating stage. These small/massive black holes appear due to the specific properties of the compact extra dimensions.
Valery V. Nikulin +3 more
doaj +1 more source
Model building by coset space dimensional reduction scheme using eight-dimensional coset spaces
Journal of High Energy Physics, 2023 We investigate the twelve-dimensional gauge-Higgs unification models with an eight- dimensional coset space as the extra space. For each model, we apply the coset space dimensional reduction procedure and examine the particle contents of the resulting ...
Kento Asai +4 more
doaj +1 more source
Signatures of Large Extra Dimensions [PDF]
, 2004 String theory suggests modifications of our spacetime such as extra dimensions and the existence of a mininal length scale. In models with addidional dimensions, the Planck scale can be lowered to values accessible by future colliders. Effective theories
A. Jevicki +33 more
core +3 more sources
Inhomogeneous compact extra dimensions [PDF]
, 2017 We show that an inhomogeneous compact extra space possesses two necessary features— their existence does not contradict the observable value of the cosmological constant Λ4 in pure f(R) theory, and the extra dimensions are stable relative to the "radion ...
K. Bronnikov +7 more
semanticscholar +1 more source
Living orthogonally: quasi-universal extra dimensions
Journal of High Energy Physics, 2019 The minimal Universal Extra Dimension scenario is highly constrained owing to opposing constraints from the observed relic density on the one hand, and the non-observation of new states at the LHC on the other.
Mathew Thomas Arun +2 more
doaj +1 more source
Space Dimension Renormdynamics
Particles, 2020 We aim to construct a potential better suited for studying quarkonium spectroscopy. We put the Cornell potential into a more geometrical setting by smoothly interpolating between the observed small and large distance behaviour of the quarkonium potential.
Martin Bures, Nugzar Makhaldiani
doaj +1 more source
Packing extra mass in compact stellar structures: an interplay between Kalb-Ramond field and extra dimensions [PDF]
, 2017 We have derived the Buchdahl's limit for a relativistic star in presence of the Kalb-Ramond field in four as well as in higher dimensions. It turns out that the Buchdahl's limit gets severely affected by the inclusion of the Kalb-Ramond field.
S. Chakraborty, S. Sengupta
semanticscholar +1 more source
Einstein-Gauss-Bonnet Gravity with Extra Dimensions
Galaxies, 2019 We consider a theory of modified gravity possessing d extra spatial dimensions with a maximally symmetric metric and a scale factor, whose ( 4 + d ) -dimensional gravitational action contains terms proportional to quadratic curvature scalars ...
Carsten van de Bruck, Chris Longden
doaj +1 more source
Extra dimensions and inflation [PDF]
Physics Letters B, 1999 It has been proposed that, without invoking supersymmetry, it is possible to solve the hierarchy problem provided the fundamental scale in the higher dimensional theory is at a much lower scale than the Planck scale. In this paper we consider a toy model where we allow $4+d$ dimensions to evolve from a region determined by the new fundamental scale ...
openaire +2 more sources