Results 21 to 30 of about 995 (110)
Journal of High Energy Physics, 2021 In this paper, we want to emphasize the pivotal role played by strings in the model realizing de Sitter using an expanding bubble, proposed and subsequently developed in [1–3].
Souvik Banerjee +2 more
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, 2015 Large Extra Dimensions Models have been proposed to remove the hierarchy problem and give an explanation why the gravity is so much weaker than the other three forces. In this work, we present an analysis of Monte Carlo data events for new physics signatures of spin-2 Graviton in context of ADD model with total dimensions $D=4+ ,$ $ = 1,2,3,4,5,6 ...
Bakhet, Nady +2 more
openaire +2 more sources
Kinetic mixing, dark photons and extra dimensions. Part II: fermionic dark matter
Journal of High Energy Physics, 2018 Extra dimensions can be very useful tools when constructing new physics models. Previously, we began investigating toy models for the 5-D analog of the kinetic mixing/vector portal scenario where the interactions of bulk dark matter with the brane ...
Thomas G. Rizzo
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A small weak scale from a small cosmological constant
Journal of High Energy Physics, 2017 We propose a framework in which Weinberg’s anthropic explanation of the cosmological constant problem also solves the hierarchy problem. The weak scale is selected by chiral dynamics that controls the stabilization of an extra dimension.
Asimina Arvanitaki +4 more
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Signatures of microscopic black holes and extra dimensions at future neutrino telescopes
Journal of High Energy Physics, 2020 In scenarios with large extra dimensions (LEDs), the fundamental Planck scale can be low enough that collisions between high-energy particles may produce microscopic black holes.
Katherine J. Mack +2 more
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Journal of High Energy Physics, 2017 Some anomalies in the processes b → sℓℓ (ℓ = μ, e) and b → c ℓ ν ¯ ℓ $$ b\to c\ell {\overline{\nu}}_{\ell } $$ (ℓ = τ, μ, e), in particular in the observables R K and R D ∗ $$ {R}_{D^{{}_{\left(\ast \right)}}} $$ , have been found by the BaBar, LHCb and ...
Eugenio Megías +2 more
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Fermion mass hierarchy and phenomenology in the 5D Domain Wall Standard Model
Journal of High Energy Physics, 2019 We have recently proposed a setup of the “Domain-Wall Standard Model” in 5D spacetime, where all the Standard Model (SM) fields are localized in certain domains of the extra 5th dimension.
Nobuchika Okada +2 more
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Gapped continuum Kaluza-Klein spectrum
Journal of High Energy Physics, 2019 We consider a warped five-dimensional model with an ultraviolet (UV) brane and, on top of the Standard Model isolated modes, continua of KK modes with different mass gaps for all particles: gauge bosons, fermions, graviton, radion and Higgs boson.
Eugenio Megías, Mariano Quirós
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Kinetic mixing, dark photons and an extra dimension. Part I
Journal of High Energy Physics, 2018 Extra dimensions (ED) can provide a useful tool for model-building. In this paper we introduce a single, flat ED extension of the kinetic-mixing/dark photon (DP) portal for dark matter (DM) interactions with the Standard Model (SM) assuming a ...
Thomas G. Rizzo
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Hidden sectors in string theory: kinetic mixings, fifth forces and quintessence
Journal of High Energy Physics, 2019 Light moduli fields in string compactifications can have interesting implications for particle physics and cosmology. Fifth force bounds impose stringent constraints on the interactions of such moduli with the visible sector.
Bobby Samir Acharya +2 more
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