scholarly journals Neutrino Dispersion Relations from a Dark Energy Model

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Emilio Ciuffoli ◽  
Jarah Evslin ◽  
Jie Liu ◽  
Xinmin Zhang
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Effective Field Theory ◽  
Lorentz Violation ◽  
Effective Field ◽  
Dispersion Relations ◽  
Interstellar Space ◽  
Neutrino Sector ◽  
Energy Models ◽  
The Earth

We consider a model in which the neutrino is kinetically coupled to a scalar field and study its implications for environmentally dependent neutrino velocities. Following the usual effective field theory logic, this coupling is expected to arise in neutrino dark energy models. It leads to a Lorentz violation in the neutrino sector. The coupling of the scalar field to the stress tensor of the Earth yields terrestrial neutrino dispersion relations distinct from those in interstellar space.

scholarly journals Marginalized Fisher forecast for Horndeski dark energy models

2017 ◽  
Vol 26 (07) ◽  
pp. 1750070 ◽  
Author(s):  
Jason S.-Y. Leung ◽  
Zhiqi Huang
Keyword(s):  
Dark Energy ◽  
Effective Field Theory ◽  
Energy Equation ◽  
Cosmological Parameters ◽  
Effective Field ◽  
Nuisance Parameters ◽  
Galaxy Surveys ◽  
Energy Parameters ◽  
Energy Models ◽  
State Formula

We use effective field theory (EFT) formalism to forecast the constraint on Horndeski class of dark energy models with future supernova and galaxy surveys. Previously, Gleyzes et al. computed unmarginalized constraints (68% CL error [Formula: see text]–[Formula: see text]) on EFT dark energy parameters by fixing all other parameters. We extend the previous work by allowing all cosmological parameters and nuisance parameters to vary and marginalize over them. We find that (i) the constraints on EFT dark energy parameters are typically worsen by a factor of few after marginalization, and (ii) the constraint on the dark energy equation-of-state [Formula: see text] is not significantly affected by the inclusion of EFT dark energy parameters.

scholarly journals THE PHANTOM OF THE OPERA: SUPERLUMINAL NEUTRINOS

2012 ◽  
Vol 27 (04) ◽  
pp. 1230005 ◽  
Author(s):  
BO-QIANG MA
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Lorentz Violation ◽  
Effective Field ◽  
Electron Neutrino ◽  
Muon Neutrino ◽  
Experimental Measurements ◽  
Background Fields

This is a brief review on the experimental measurements of the muon neutrino velocities from the OPERA, Fermilab and MINOS experiments and that of the (anti)-electron neutrino velocities from the supernova SN1987A, and consequently on the theoretical attempts to attribute the data as signals for superluminality of neutrinos. Different scenarios on how to understand and treat the background fields in the effective field theory frameworks are pointed out. Challenges on interpreting the OPERA result as a signal of neutrino superluminality are briefly reviewed and discussed. It is also pointed out that a covariant picture of Lorentz violation can avoid the refutation on the OPERA experiment.

scholarly journals QCD MODIFIED GHOST SCALAR FIELD DARK ENERGY MODELS

2013 ◽  
Vol 22 (05) ◽  
pp. 1350018 ◽  
Author(s):  
K. KARAMI ◽  
S. ASADZADEH ◽  
M. MOUSIVAND ◽  
Z. SAFARI
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Linear Perturbation ◽  
Density Parameter ◽  
Frw Cosmology ◽  
Frw Universe ◽  
Ghost Dark Energy ◽  
Energy Models ◽  
Scalar Field Models ◽  
Ghost Scalar Field

Within the framework of FRW cosmology, we study the QCD modified ghost scalar field models of dark energy (DE) in the presence of both interaction and viscosity. For a spatially nonflat FRW universe containing modified ghost dark energy (MGDE) and dark matter (DM), we obtain the equation of state of MGDE, the deceleration parameter as well as a differential equation governing the MGDE density parameter. We also investigate the growth of structure formation for our model in a linear perturbation regime. Furthermore, we reconstruct both the dynamics and potentials of the quintessence, tachyon, K-essence and dilaton scalar field DE models according to the evolution of the MGDE density.

scholarly journals Effective field theory of dark energy: A review

2020 ◽  
Vol 857 ◽  
pp. 1-63 ◽  
Author(s):  
Noemi Frusciante ◽  
Louis Perenon
Keyword(s):  
Field Theory ◽  
Dark Energy ◽  
Effective Field Theory ◽  
Effective Field

scholarly journals POWER-LAW ENTROPY CORRECTED NEW HOLOGRAPHIC SCALAR FIELD MODELS OF DARK ENERGY WITH MODIFIED IR-CUTOFF

2011 ◽  
Vol 26 (33) ◽  
pp. 2487-2499 ◽  
Author(s):  
A. KHODAM-MOHAMMADI
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Kinetic Energy ◽  
Holographic Dark Energy ◽  
Matter Field ◽  
Dark Energy Density ◽  
Energy Models ◽  
Scalar Field Models ◽  
Phantom Barrier ◽  
Limiting Case

In this work, the PLECHDE model with Granda–Oliveros (G–O) IR-cutoff is studied. The evolution of dark energy density, deceleration and EoS parameters are calculated. I demonstrate that under a condition, our universe can accelerate near the phantom barrier at present time. We calculate these parameters also in PLECHDE at Ricci scale, when α = 2 and β = 1, and a comparison between Ricci scale, G–O cutoff and non-corrected HDE without matter field with G–O cutoff is done. The correspondence between this model and some scalar field of dark energy models is established. By this method, the evolutionary treatment of kinetic energy and potential for quintessence, tachyon, K-essence and dilaton fields, are obtained. I show that the results has a good compatibility with previous work in the limiting case of flat, dark dominated and non-corrected holographic dark energy.

scholarly journals NEW CHANCE FOR RESEARCHES ON LORENTZ VIOLATION

2012 ◽  
Vol 10 ◽  
pp. 195-206 ◽  
Author(s):  
BO-QIANG MA
Keyword(s):  
Field Theory ◽  
Standard Model ◽  
Effective Field Theory ◽  
Lorentz Violation ◽  
Phenomenological Analysis ◽  
Effective Field ◽  
Standard Model Extension ◽  
Model Extension ◽  
The Standard Model

I present a brief review on the motivation for the study on Lorentz violation and on some of our studies with phenomenological analysis of Lorentz violation effects. I also discuss three effective field theory frameworks for Lorentz violation: the Coleman-Glashow model, the standard model extension (SME), and the standard model supplement (SMS). The situation of the OPERA "anomaly" is also briefly reviewed, together with some discussion on the superluminality of neutrinos within the effective field theory frameworks.

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