Results 11 to 20 of about 5,959 (267)
Scalar-connection gravity and spontaneous scalarization [PDF]
Physical Review D, 2021 Scalar-tensor theories of gravity are known to allow significant deviations from general relativity through various astrophysical phenomena. In this paper, we formulate a scalar-connection gravity by setting up scalars and connection configurations instead of metric. Since the matter sector is not straightforward to conceive without a metric, we invoke
Hemza Azri, Salah Nasri
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Journal of Cosmology and Astroparticle Physics, 2020 We provide a complete classification of Poincar'e-invariant scalar field theories with an enlarged set of classical symmetries to leading order in derivatives, namely for the so-called P(X,ϕ) theories, in two or more spacetime dimensions. We find only three possibilities: Dirac-Born-Infeld, Cuscuton and Scaling theories.
Grall, Tanguy +2 more
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International Journal of Modern Physics B, 1994 We determine the excitations and S matrix of an integrable isotropic antiferromagnetic quantum spin chain of alternating spin 1/2 and spin 1. There are two types of gapless one-particle excitations: the usual spin 1/2 (“spinor”) kink, and a new spin 0 (“scalar”) kink.
de Vega, H. J. +2 more
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Journal of Semantics, 2014 We present experimental evidence showing that there is considerable variation between the rates at which scalar expressions from different lexical scales give rise to Upper-Bounded construals. We investigated two factors that might explain the variation between scalar expressions: first, the availability of the lexical scales, which we measured on the ...
Tiel, B.J.M. van +3 more
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Physical Review D, 2019 We conjecture that there exists a scalar bound state for every pair of fundamental fermions at a UV (`composite') scale, $ \gg v_{\text{weak}}$. This implies a large number of universally coupled, sub-critical Higgs doublets. All but the Standard Model Higgs are `dormant,' with large positive squared masses and each receives a small vacuum expectation
Hill, Christopher T. +3 more
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Scalar perturbations in scalar field quantum cosmology [PDF]
Physical Review D, 2009 In this paper it is shown how to obtain the simplest equations for the Mukhanov-Sasaki variables describing quantum linear scalar perturbations in the case of scalar fields without potential term. This was done through the implementation of canonical transformations at the classical level, and unitary transformations at the quantum level, without ever ...
Falciano, F. T., Pinto-Neto, Nelson
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Scalar-scalar, scalar-tensor, and tensor-tensor correlators from anisotropic inflation [PDF]
Physical Review D, 2010 We compute the phenomenological signatures of a model (Watanabe et al' 09) of anisotropic inflation driven by a scalar and a vector field. The action for the vector is U(1) invariant, and the model is free of ghost instabilities. A suitable coupling of the scalar to the kinetic term of the vector allows for a slow roll evolution of the vector vev, and ...
Gumrukcuoglu A. E. +2 more
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Spontaneous Scalarization and Boson Stars [PDF]
, 2000 We study spontaneous scalarization in Scalar-Tensor boson stars. We find that scalarization does not occur in stars whose bosons have no self-interaction. We introduce a quartic self-interaction term into the boson Lagrangian and show that when this term
A. W. Whinnett +16 more
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SCALAR–SCALAR BOUND STATE IN NONCOMMUTATIVE SPACE [PDF]
Modern Physics Letters A, 2001 Bethe–Salpeter equation in the noncommutative space for a scalar–scalar bound state is considered. It is shown that in the nonrelativistic limit, the effect of spatial noncommutativity appears as if there exists a magnetic dipole moment coupled to each particle.
Haghighat, M., Loran, F.
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Tensor-multi-scalar theories: relativistic stars and 3+1 decomposition [PDF]
, 2015 Gravitational theories with multiple scalar fields coupled to the metric and each other --- a natural extension of the well studied single-scalar-tensor theories --- are interesting phenomenological frameworks to describe deviations from general ...
Berti, Emanuele +6 more
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