Showing 121 - 140 results of 151 for search '"observational cosmology"', query time: 0.14s Refine Results
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    The galaxy halo formation rate by Percival, W, Miller, L

    Published 1998
    “…The rate at which galaxy halos form is thought to play a key role in explaining many observable cosmological phenomena such as the initial epoch at which luminous matter forms and the distribution of active galaxies. …”
    Journal article
  11. 131

    Neutrino CP violation and sign of baryon asymmetry in the minimal seesaw model by Yusuke Shimizu, Kenta Takagi, Morimitsu Tanimoto

    Published 2018-03-01
    “…The sign of the CP violating Dirac phase at low energy is fixed by the observed cosmological baryon asymmetry since there is only one phase parameter in the model. …”
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    Article
  12. 132

    Relaxation of Higgs mass and cosmological constant with four-form fluxes and reheating by Hyun Min Lee

    Published 2020-01-01
    “…The Higgs mass parameter can be relaxed to a correct value due to the four-form coupling to the Higgs field and it stops changing due to an extremely suppressed transition probability from the observed cosmological constant to AdS space. We first introduce a non-minimal four-form coupling to gravity and discuss the role of a new scalar field as the inflaton and the conditions for a successful reheating at the end of relaxation.…”
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    Article
  13. 133

    On the Apparent Discretization of Spacetime and Its Connection with the Cosmological Constant by Jaume Giné, Giuseppe Gaetano Luciano

    Published 2024-03-01
    “…The obtained result is used to infer the value of zero-point energy in the universe, which is found to be in good agreement with the observed cosmological constant. This potentially offers some hints towards the resolution of the cosmological constant problem.…”
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    Article
  14. 134

    Braneworld black holes and entropy bounds by Y. Heydarzade, H. Hadi, C. Corda, F. Darabi

    Published 2018-01-01
    “…This difference is interpreted as the extra loss of information, associated to the extra dimension, when an extra-dimensional black hole is moved outward the observer's cosmological horizon. Also, it is discussed that N-bound entropy is hold for the possible solutions here. …”
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    Article
  15. 135

    Loop quantum gravity and cosmological constant by Xiangdong Zhang, Gaoping Long, Yongge Ma

    Published 2021-12-01
    “…Remarkably, by suitably choosing the value of the regularization parameter, the observational cosmological constant can emerge at large volume limit from the effect of quantum gravity, and the effective Newtonian constant satisfies the experimental restrictions in the meantime.…”
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    Article
  16. 136

    Effects of Scattering of Radiation on Wormholes by Alexander Kirillov, Elena Savelova

    Published 2018-02-01
    “…Significant progress in the development of observational techniques gives us the hope to directly observe cosmological wormholes. We have collected basic effects produced by the scattering of radiation on wormholes, which can be used in observations. …”
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    Article
  17. 137

    The cosmological dark sector as a scalar σ-meson field by Saulo Carneiro

    Published 2018-03-01
    “…Abstract Previous quantum field estimations of the QCD vacuum in the expanding space-time lead to a dark energy component scaling linearly with the Hubble parameter, which gives the correct figure for the observed cosmological term. Here we show that this behaviour also appears at the classical level, as a result of the chiral symmetry breaking in a low energy, effective $$\sigma $$ σ -model. …”
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  18. 138

    Axiogenesis with a heavy QCD axion by Raymond T. Co, Tony Gherghetta, Keisuke Harigaya

    Published 2022-10-01
    “…Abstract We demonstrate that the observed cosmological excess of matter over anti-matter may originate from a heavy QCD axion that solves the strong CP problem but has a mass much larger than that given by the Standard Model QCD strong dynamics. …”
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    Article
  19. 139

    Constraining Neutrino Cosmologies with Nonlinear Reconstruction by Shi-Hui Zang, Hong-Ming Zhu

    Published 2024-01-01
    “…Nonlinear gravitational evolution induces strong nonlinearities in the observed cosmological density fields, leading to positive off-diagonal correlations in the power spectrum covariance. …”
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    Article
  20. 140

    An étude on global vacuum energy sequester by Guido D’Amico, Nemanja Kaloper, Antonio Padilla, David Stefanyszyn, Alexander Westphal, George Zahariade

    Published 2017-09-01
    “…Abstract Recently two of the authors proposed a mechanism of vacuum energy sequester as a means of protecting the observable cosmological constant from quantum radiative corrections. …”
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    Article