Constraints on a scalar-tensor model with Gauss–Bonnet coupling from SN Ia and BAO observations
Sign Up to like & getrecommendations! Published in 2019 at "Astrophysics and Space Science"
DOI: 10.1007/s10509-019-3629-6
Abstract: In the present work, the observational consequences of a subclass of of the Horndeski theory have been investigated. In this theory a scalar field (tachyon field) non-minimally coupled to the Gauss-Bonnet invariant through an arbitrary… read more here.
Keywords: gauss bonnet; field; scalar field; model ... See more keywords
Constraints on scalar and tensor spectra from Neff
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/06/007
Abstract: At the linear level, the gravitational wave (GW) spectrum predicted by inflation, and many of its alternatives, can have arbitrarily small amplitude and consequently an unconstrained tilt. However, at second order, tensor fluctuations are sourced… read more here.
Keywords: tensor; tensor spectra; spectrum; scalar spectrum ... See more keywords
Indirect and monojet constraints on scalar leptoquarks
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DOI: 10.1103/physrevd.99.095005
Abstract: We obtain constraints on first- and second-generation scalar leptoquarks using the available data on dilepton (Drell-Yan) and monojet searches at the CERN Large Hadron Collider. Assuming that the leptoquark interactions respect the Standard Model gauge… read more here.
Keywords: indirect monojet; monojet constraints; scalar leptoquarks; constraints scalar ... See more keywords