Mostrando 5,241 - 5,260 Resultados de 5,650 Para Buscar '"cosmology"', tiempo de consulta: 0.14s Limitar resultados
  1. 5241
    “…However, alternative cosmological models have been proposed, including cosmic strings, phase transitions, domain walls, primordial fluctuations and "audible" axions. …”
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  2. 5242
    por García-Bellido, J
    Publicado 1997
    “…We find that the scalar condensate that plays the role of the inflaton can drive a long period of cosmological expansion, produce the right amount of temperature anisotropies in the microwave background, and end inflation when the monopole acquires a vacuum expectation value. …”
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  3. 5243
    “…If neutrinos are to play a relevant cosmological role, they must be essentially degenerate with a mass matrix of the bimaximal mixing type. …”
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  4. 5244
    por Englert, F
    Publicado 1999
    “…A macroscopic universe may emerge naturally from a Planck cell fluctuation by unfolding through a stage of exponential expansion towards a homogeneous cosmological background. Such primordial inflation requires a large and presumably infinite degeneracy at the Planck scale, rooted in the unbounded negative gravitational energy stored in conformal classes. …”
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  5. 5245
    por Laine, M.
    Publicado 2000
    “…It turns out that the characteristics of the symmetry restoring phase transition, such as its order, are important for cosmological applications, such as baryon asymmetry generation. …”
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  6. 5246
    “…We combine the constraint suggested by the recent BNL E821 measurement of the anomalous magnetic moment of the muon on the parameter space of the constrained MSSM (CMSSM) with those provided previously by LEP, the measured rate of b to s gamma decay and the cosmological relic density Omega-hsquared. Our treatment of Omega-hsquared includes carefully the direct-channel Higgs poles in annihilation of pairs of neutralinos chi and a complete analysis of chi - slepton coannihilation. …”
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  7. 5247
    por Rabadan, Raul, Zamora, Frederic
    Publicado 2002
    “…We analyse some examples where the Poincar\'e invariance is broken along the time direction (cosmological models).After that, we discuss how to obtain a finite interaction between D-branes and orientifold planes in the compact space at the supergravity level.…”
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  8. 5248
    “…In particular, several studies have considered the possibility that these small violations of Lorentz symmetry may affect various astrophysical observations, such as the evaluation of the GZK limit for cosmic rays, the interaction of TeV photons with the Far Infrared Background and the arrival time of photons with different energies from cosmological sources. We show that the same Planck-scale departures from Lorentz symmetry that lead to a modification of the GZK limit which would be consistent with the observations reported by AGASA, also have significant implications for the evaluation of the Bahcall-Waxman bound on the flux of high-energy neutrinos produced by photo-meson interactions in sources of size not much larger than the proton photo-meson mean free path.…”
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  9. 5249
    “…Presentations, both theoretical and experimental, addressed the status of Standard Model and Flavour phyiscs, Neutrino and Cosmological topics, new insights beyond the present understanding of particle physics and cross-fertilization in areas such as medicine, biology, technological spin-offs and computing. …”
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  10. 5250
    por Rossato, Kenneth C
    Publicado 2011
    “…Many models of new physics include the possibility of a new massive long-lived particle, the existence of which could explain discrepancies between cosmological theories and observations of 6 Li and 7 Li in the early universe. …”
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  11. 5251
    “…Under this framework, Newton’s gravitational constant and the cosmological constant are varied in the system. We rewrite the thermodynamic first law in a more extended form containing both the pressure and the central charge of the dual conformal field theory, i.e., the restricted phase transition formula. …”
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    Online Artículo Texto
  12. 5252
    “…More than 90% of the examples from prehistoric Europe come from this one site, establishing it as a place of outstanding shamanistic/cosmological significance. Our work, involving a programme of experimental replication, analysis of macroscopic traces, organic residue analysis and 3D image acquisition, metrology and visualisation, represents the first attempt to understand the manufacturing processes used to create these artefacts. …”
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    Online Artículo Texto
  13. 5253
    por James, Paul
    Publicado 2020
    “…This essay argues against both these paths—crisis-ridden agonism or algorithmic resource-allocation—and turns instead to a form of ethics of care which takes its departure from older forms of ethics, while recognizing that modern and postmodern challenges no longer allow their grounding in animated relations, natural rights, or cosmological truths.…”
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  14. 5254
    por Tsujimura, Jun, Nambu, Yasusada
    Publicado 2020
    “…In particular, we show that, in spherical symmetric static spacetimes with a negative cosmological constant, wave fronts of null geodesics from a point on the AdS boundary become extremal surfaces and therefore they can be regarded as the Ryu–Takayanagi surfaces. …”
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    Online Artículo Texto
  15. 5255
    por Rao, Sandy
    Publicado 2022
    “…Patients remain bound by object-oriented medical cosmologies, thus reaffirming the hierarchical system underpinned by professional dominance. …”
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  16. 5256
    “…A study on the effects of implementing the Granda–Oliveros infrared cutoff in the recently introduced Barrow holographic dark energy model is presented, and its cosmological evolution is investigated. We find how the deformation parameter, [Formula: see text] , affects the evolution of H(z) and that from this model it is possible to obtain an accelerated expansion regime of the universe at late times. …”
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    Online Artículo Texto
  17. 5257
    por Zarepour, Mohammad Saleh
    Publicado 2022
    “…The Successive Addition Argument (SAA) is one of the arguments proposed by the defenders of the Kalām Cosmological Argument to support the claim that the universe has a beginning. …”
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  18. 5258
    “…Our interpretation is well supported by a detailed comparison with state-of-the-art cosmological simulations.…”
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    Online Artículo Texto
  19. 5259
    “…Large scale structure surveys are likely the next leading probe of cosmological information. It is therefore crucial to reliably predict their observables. …”
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  20. 5260
    “…The latter has been shown to be equivalent to General Relativity with a positive cosmological constant and a scalar mode. Therefore, one expects that solutions of the $R^2$ theory will be identical to that of Einstein theory. …”
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