Confronting pseudo-Nambu-Goldstone-boson quintessence with data

Dutta, Koushik; Sorbo, Lorenzo

doi:10.1103/physrevd.75.063514

Cited by 31 publications

(44 citation statements)

References 41 publications

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“…Pseudo-Nambu Goldstone Boson (PNGB) -This model is motivated by the potential V (φ ∝ [1 + cos(φ/F )]) of the scalar field (Frieman et al 1995;Dutta & Sorbo 2007). The dark energy in this model is parameterized by its equation of state (Basilakos et al 2010)…”

Section: Cosmological Modelsmentioning

confidence: 99%

An Evaluation of Cosmological Models from the Expansion and Growth of Structure Measurements

Zhai

Blanton

Slosar

et al. 2017

ApJ

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We compare a large suite of theoretical cosmological models to observational data from the cosmic microwave background, baryon acoustic oscillation measurements of expansion, Type Ia SNe measurements of expansion, redshift space distortion measurements of the growth of structure, and the local Hubble constant. Our theoretical models include parametrizations of dark energy as well as physical models of dark energy and modified gravity. We determine the constraints on the model parameters, incorporating the redshift space distortion data directly in the analysis. To determine whether models can be ruled out, we evaluate the p-value (the probability under the model of obtaining data as bad or worse than the observed data). In our comparison, we find the well known tension of H 0 with the other data; no model resolves this tension successfully. Among the models we consider, the large scale growth of structure data does not affect the modified gravity models as a category particularly differently than dark energy models; it matters for some modified gravity models but not others, and the same is true for dark energy models. We compute predicted observables for each model under current observational constraints, and identify models for which future observational constraints will be particularly informative.

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Section: Cosmological Modelsmentioning

confidence: 99%

An Evaluation of Cosmological Models from the Expansion and Growth of Structure Measurements

Zhai

Blanton

Slosar

et al. 2017

ApJ

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“…However, there is one outstanding model-a cosmic axion or pseudo-Nambu Goldstone boson is arguably the only natural way to have an extremely low mass scalar (Frieman et al 1995), and keep it "dark" or non-interacting with the Standard Model (Carroll 1998). Here, the potential is V = m 4 (1 + cos φ/f ), where m 0.002 eV and f ∼ 10 18 GeV (Coble et al 1997;Dutta and Sorbo 2007). The field has been frozen by Hubble friction through most of cosmic history; it is currently relaxing to its ground state; in the future, the field will oscillate rapidly in the bottom of the potential, redshifting like nonrelativistic matter.…”

Section: Cosmological Parametersmentioning

confidence: 97%

Perspectives on Dark Energy

Caldwell¹

2009

Space Sci Rev

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“…We use these equations to obtain the evolution of the scalar field and Hubble parameter to constrain the model parameters. We will compare the latest observational constraints with the earlier work done in [16].…”

Section: Pngb Dark Energymentioning

confidence: 99%

“…The authors in Ref. [16] used 182 Gold SNe Ia data points [36] along with the CMB shift parameter constraint from WMAP 3-year data [37], whereas in this work we use 580 SNe data points from Union2.1 compilations [28], the CMB shift parameter from PLANCK data [29], and the baryon acoustic oscillation data from SDSS [31][32][33][34].…”

Section: Constraining Standard Pngb Dark Energymentioning

confidence: 99%

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Viable dark energy models using pseudo-Nambu-Goldstone bosons

Adak

Dutta

2014

Phys. Rev. D

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

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Confronting pseudo-Nambu-Goldstone-boson quintessence with data

Cited by 31 publications

References 41 publications

An Evaluation of Cosmological Models from the Expansion and Growth of Structure Measurements

An Evaluation of Cosmological Models from the Expansion and Growth of Structure Measurements

Perspectives on Dark Energy

Viable dark energy models using pseudo-Nambu-Goldstone bosons

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