Confronting pseudo-Nambu-Goldstone-boson quintessence with data

2006/12/31 by Koushik Dutta, Lorenzo Sorbo · 4 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #astro-ph #hep-ph

paper · pdf · doi:10.1103/physrevd.75.063514

published as Phys.Rev.D75:063514,2007 · 6 pages, 4 figures, references added, minor changes

arxiv created 2007/01/11 · openalex publication_date 2007/03/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We analyze the observational constraints on the model where a pseudo-Nambu-Goldstone boson (pNGB) plays the role of dark energy. The constraints are derived by using the latest Gold set of 182 type Ia supernovae and the CMB shift parameter. We allow for both the initial value of the scalar field and the present value of the energy density in the pNGB to vary. We find that---compared to previous analyses---the allowed portion of parameter space has shrunk around the region where the pNGB does not evolve significantly.

Citations

• Statefinder—A new geometrical diagnostic of dark energy
• Quintessence and the Rest of the World: Suppressing Long-Range Interactions
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Dynamics of dark energy
• Cosmological consequences of a rolling homogeneous scalar field

Cited by

• Testing Quintessence Axion Dark Energy with Recent Cosmological Results
• Narrowing down the possible explanations of cosmic acceleration with geometric probes
• Constraints on Dark Energy from Galaxy Cluster Gas Mass Fraction versus Redshift Data
• Future CMB constraints on cosmic birefringence and implications for fundamental physics