Viable dark energy models using pseudo-Nambu-Goldstone bosons

Abstract

A canonical pseudo-Nambu Goldstone Boson (pNGB) can play the role of a dark energy field responsible for present cosmic acceleration. Confronting with the recent cosmological data, we find that the pNGB field requires spontaneous symmetry breaking scale $f$ close to $M_P$ and the initial field value fine-tuned. It is difficult to achieve a large $f$ in a theoretically consistent set-up. A possible resolution can be achieved by increasing the Hubble friction in well motivated particle physics models in the general set-up of modified gravity theories. We show two phenomenological examples of this set-up where the standard pNGB action have been modified by introducing terms motivated from galileon cosmology. We confront those examples with the recent supernovae, PLANCK and BAO data. We find that moderate values of the dimensionless constants that increase the friction, make $f<<M_P$ and the generic initial conditions also favourable by the data. We also comment how the fifth force constraints arising in these modified theories can be evaded.

9 pages, 8 figures. Title has been changed, minor changes in the text, few references added

References in corpus (37)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• Cosmological Imprint of an Energy Component with General Equation of State
• 4D Gravity on a Brane in 5D Minkowski Space
• Cosmology and the Fate of Dilatation Symmetry
• The 6dF Galaxy Survey: Baryon Acoustic Oscillations and the Local Hubble Constant
• The galileon as a local modification of gravity
• Baryon Acoustic Oscillations in the Sloan Digital Sky Survey Data Release 7 Galaxy Sample
• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
• The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
• Cosmological Constraints from the SDSS Luminous Red Galaxies
• Quintessence and the Rest of the World
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Sky Maps, Systematic Errors, and Basic Results
• Covariant Galileon
• The WiggleZ Dark Energy Survey: mapping the distance-redshift relation with baryon acoustic oscillations
• Cosmology with Ultra-light Pseudo-Nambu-Goldstone Bosons
• Imperfect Dark Energy from Kinetic Gravity Braiding
• Dark Matter and Dark Energy
• Quintessence, the Gravitational Constant, and Gravity
• On the Possibility of Large Axion Decay Constants
• Robust Dark Energy Constraints from Supernovae, Galaxy Clustering, and Three-Year Wilkinson Microwave Anisotropy Probe Observations
• From cosmic deceleration to acceleration: new constraints from SN Ia and BAO/CMB
• The Dynamics of Quintessence, The Quintessence of Dynamics
• Quintessential Difficulties
• UV-Protected Inflation
• Introducing the Slotheon: a slow Galileon scalar field in curved space-time
• Screening the fifth force in the Horndeski's most general scalar-tensor theories
• Of pNGB QuiNtessence
• Light mass galileons: Cosmological dynamics, mass screening and observational constraints
• A Class of Effective Field Theory Models of Cosmic Acceleration
• Confronting pNGB quintessence with data
• Cosmological Implications of the Effective Field Theory of Cosmic Acceleration
• Kinetic Gravity Braiding and axion inflation
• Late time acceleration in a slow moving galileon field
• Generalizing thawing dark energy models: the standard vis-à-vis model independent diagnostics

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