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Cosmology with Ultralight Pseudo Nambu-Goldstone Bosons
Open accessAbstract
We explore the cosmological implications of an ultralight pseudo Nambu-Goldstone boson. With global spontaneous symmetry breaking scale $f\ensuremath{\simeq}{10}^{18}\mathrm{GeV}$ and explicit breaking scale comparable to Mikheyev-Smirnov-Wolfenstein neutrino masses, $M\ensuremath{\sim}{10}^{\ensuremath{-}3}\mathrm{eV}$, such a field, which acquires a mass ${m}_{\ensuremath{\varphi}}\ensuremath{\sim}{M}^{2}/f\ensuremath{\sim}{H}_{0}$, would currently dominate the energy density of the Universe. The field acts as an effective cosmological constant before relaxing into a condensate of nonrelativistic bosons. Such a model can reconcile dynamical estimates of the density parameter, ${\ensuremath{\Omega}}_{m}\ensuremath{\sim}0.2$, with a spatially flat universe, yielding ${H}_{0}{t}_{0}\ensuremath{\simeq}1$ consistent with limits from gravitational lens statistics.
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Cites
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Ratra, B., & Peebles, P. J. E. (1988) · Physical Review D · doi:10.1103/physrevd.37.3406 · Cited by 4,310
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TDCOSMO Collaboration, Birrer, S., Buckley-Geer, E. J., Cappellari, M., Courbin, F., Dux, F., Fassnacht, C. D., Frieman, J. A., Galan, A., Gilman, D., et al. (2025) · Astronomy & Astrophysics · doi:10.1051/0004-6361/202555801 · Cited by 54
Self-citationAbdalla, E., Abellán, G. F., Aboubrahim, A., Agnello, A., Akarsu, Ö., Akrami, Y., Alestas, G., Aloni, D., Amendola, L., Anchordoqui, L. A., et al. (2022) · Journal of High Energy Astrophysics · doi:10.1016/j.jheap.2022.04.002 · Cited by 37
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Metadata
- Authors
- Frieman, J. A., Hill, C. T., Stebbins, A., & Waga, I.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1995-09-11
- Volume
- 75
- Issue
- 11
- Pages
- 2077-2080
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2060921884
- Cited by
- 931
- References
- 1
- FWCI
- 8.98
- Type
- journal article
- Language
- en
- Open access
- green
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