Results 1 to 10 of about 5,429,060 (314)
Emergent cosmology from matrix theory
Journal of High Energy Physics, 2022 Matrix theory is a proposed non-perturbative definition of superstring theory in which space is emergent. We begin a study of cosmology in the context of matrix theory.
Suddhasattwa Brahma +2 more
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Equivalence of Models in Loop Quantum Cosmology and Group Field Theory
Universe, 2019 The paradigmatic models often used to highlight cosmological features of loop quantum gravity and group field theory are shown to be equivalent, in the sense that they are different realizations of the same model given by harmonic cosmology.
Bekir Baytaş +2 more
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Mixing particle production for relaxion mechanism
Journal of High Energy Physics, 2022 We consider the production of two heavy gauge bosons as a relaxation stopping mechanism. In this work, we analyse the conditions for a tachyonic mode for a linear combination of gauge bosons and show that the criteria are significantly different than the
Tanech Klangburam +4 more
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String theory and cosmology [PDF]
General Relativity and Gravitation, 1996 We discuss the main cosmological implications of considering string-loop effects and a potential for the dilaton in the lowest order string effective action. Our framework is based on the effective model arising from regarding homogeneous and isotropic dilaton, metric and Yang-Mills field configurations.
Bento, M. C., Bertolami, O.
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Metric algebroid and Dirac generating operator in Double Field Theory
Journal of High Energy Physics, 2020 We give a formulation of Double Field Theory (DFT) based on a metric algebroid. We derive a covariant completion of the Bianchi identities, i.e. the pre-Bianchi identity in torsion and an improved generalized curvature, and the pre-Bianchi identity ...
Ursula Carow-Watamura +3 more
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Dark matter and dark energy from a Kaluza–Klein inspired Brans–Dicke gravity with barotropic fluid
European Physical Journal C: Particles and Fields, 2022 We study the Kaluza–Klein inspired Brans–Dicke model with barotropic matter. Following from our previous work, the traditional Kaluza–Klein gravity action is introduced with an additional scalar field and 2 gauge fields.
Areef Waeming +3 more
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Inhomogeneous M-theory cosmologies [PDF]
Journal of Mathematical Physics, 2002 We study a class of inhomogeneous and anisotropic G2 string cosmological models. In the case of separable G2 models we show that the governing equations reduce to a system of ordinary differential equations. We focus on a class of separable G2 M-theory cosmological models, and study their qualitative behavior (a class of models with time-reversed ...
Coley, Alan A., van den Hoogen, R. J.
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Cosmological theory without singularities [PDF]
Physical Review D, 1993 A theory of gravitation is constructed in which all homogeneous and isotropic solutions are nonsingular, and in which all curvature invariants are bounded. All solutions for which curvature invariants approach their limiting values approach de Sitter space. The action for this theory is obtained by a higher derivative modification of Einstein's theory.
Brandenberger, R. +2 more
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Current status on pair-produced muon-philic vectorlike leptons in multilepton channels at the LHC
Journal of High Energy Physics, 2023 In this work, we obtain the current limits on the pair production of vectorlike leptons decaying to a Standard Model gauge boson and a lepton in the second generation using the Run-2 data at the LHC.
Junichiro Kawamura, Seodong Shin
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Effects of odderon spin on helicity amplitudes in pp elastic scattering
European Physical Journal C: Particles and Fields, 2023 In recent years, the discovery of the odderon, a colorless C-odd gluonic compound, has been confirmed in the TOTEM and D0 collaborations. However, the spin quantum number of the odderon remains unidentified.
Prin Sawasdipol +3 more
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