Mostrando 4,941 - 4,960 Resultados de 5,650 Para Buscar '"cosmology"', tiempo de consulta: 0.08s Limitar resultados
  1. 4941
    “…We calculate neutrino fluxes above various threshold energies for points along the coannihilation/rapid-annihilation and focus-point strips where the CMSSM yields the correct cosmological relic density for tan(beta) = 10 and 55 for $\mu$ > 0, exploring their sensitivities to uncertainties in the spin-dependent and -independent scattering matrix elements. …”
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    info:eu-repo/semantics/article
  2. 4942
    “…We require the DMSMs to provide all the cosmological DM density indicated by Planck and other observations, and we impose the upper limits on spin-independent and -dependent scattering from direct DM search experiments. …”
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  3. 4943
    por Raccanelli, Alvise, Vlah, Zvonimir
    Publicado 2023
    “…The two-point summary statistics is one of the most commonly used tools in the study of cosmological structure. Starting from the theoretical power spectrum defined in the 3D volume and obtained via the process of ensemble averaging, we establish the construction of the “observed 3D power spectrum,” folding the unequal-time information around the average position into the wave modes along the line of sight. …”
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    Enlace del recurso
  4. 4944
    “…If neutrinos are to play a relevant cosmological role, they must be essentially degenerate. …”
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    Enlace del recurso
  5. 4945
    por Hajdukovic, Dragan Slavkov
    Publicado 2009
    “…I present three relations, striking with their simplicity and fundamental appearance; the first one connects the Compton wavelength of a pion and dark energy density of the Universe; the second one connects Compton wavelength of a pion and the mass distribution of non-baryonic dark matter in a Galaxy; while the third one relates mass of a pion to fundamental physical constants and cosmological parameters. All these relations are in excellent numerical agreement with observations.…”
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    Enlace del recurso
  6. 4946
    por Tseytlin, Arkady A
    Publicado 1996
    “…In particular, we explain why dimensional reduction in all internal world-volume directions including time leads to a metric (related by analytic continuation to a cosmological metric) which does not depend on p-brane charges, i.e. is the same as the metric following by reduction from a higher-dimensional `neutral' Schwarzschild black hole.…”
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    Enlace del recurso
  7. 4947
    por Overbye, Dennis
    Publicado 2005
    “…So when Stephen Shenker, a Stanford University theorist who was moderating a panel discussion here on the future of the putative theory of everything, asked for a show of hands on the fate of a strange number known as the cosmological constant, some 400 physicists and mathematicians wer happy to swallow their doubts and vote (2 pages)…”
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  8. 4948
    “…We discuss cosmological inflation in the minimal Wess-Zumino model with a single massive chiral supermultiplet. …”
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    Enlace del recurso
  9. 4949
    “…We present a model for cosmological inflation based on a no-scale supergravity sector with an SU(2,1)/U(1) Kahler potential, a single modulus T and an inflaton superfield Phi described by a Wess-Zumino model with superpotential parameters (mu, lambda). …”
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    Enlace del recurso
  10. 4950
    “…We propose a minimal model framework for physics below the Planck scale with the following features: (i) it is based on no-scale supergravity, as favoured in many string compactifications, (ii) it incorporates Starobinsky-like inflation, and hence is compatible with constraints from the Planck satellite, (iii) the inflaton may be identified with a singlet field in a see-saw model for neutrino masses, providing an efficient scenario for reheating and leptogenesis, (iv) supersymmetry breaking occurs with an arbitrary scale and a cosmological constant that vanishes before radiative corrections, (v) regions of the model parameter space are compatible with all LHC, Higgs and dark matter constraints.…”
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  11. 4951
    “…In the cosmological context, for the Standard Model to be valid up to the scale of inflation, the top quark Yukawa coupling $y_t$ should not exceed the critical value $y_t^{crit}$, coinciding with good precision (about 0.02%) with the requirement of the stability of the electroweak vacuum. …”
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  12. 4952
    por Castorina, P., Satz, H.
    Publicado 2013
    “…For hadron production in high energy collisions, causality requirements lead to the counterpart of the cosmological horizon problem: the production occurs in a number of causally disconnected regions of finite space-time size. …”
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    Enlace del recurso
  13. 4953
    “…We study how, as a result of the scanning of supersymmetry breaking during the cosmological evolution, a relaxation mechanism can naturally determine a hierarchy between the weak scale and the masses of supersymmetric particles. …”
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  14. 4954
    por Gasperini, M., Ricci, R., Veneziano, G.
    Publicado 1993
    “…Bianchi-type (homogeneous) cosmologies in arbitrary dimensions. Simple duality transformations for the metric and the antisymmetric tensor field, generalizing those known from the Abelian isometry (Bianchi I) case, are obtained using either a Lagrangian or a Hamiltonian approach. …”
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    Enlace del recurso
  15. 4955
    por Bakas, Ioannis
    Publicado 1996
    “…They include black-hole and worm-hole solutions as well as cosmological models with an exact conformal field theory description. …”
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  16. 4956
    por Davidson, Sacha, Ellis, John R.
    Publicado 1997
    “…We also make an indicative application of our results to derive possible basis-independent cosmological upper bounds on flavour-dependent violation of R parity.…”
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    Enlace del recurso
  17. 4957
    por Ellis, John R.
    Publicado 1999
    “…In combination with other cosmological observations, including those of high-redshift supernovae and large-scale structure, the CMB is on the way to providing a detailed budget for the density of the Universe, to be compared with particle-physics calculations for neutrinos and cold dark matter. …”
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    Enlace del recurso
  18. 4958
    por Schmidhuber, Christof
    Publicado 2000
    “…After this review I discuss a key point at which our understanding of superstring theory presently stops: the problem of supersymmetry breaking and the cosmological constant. I explain in which direction I imagine a way out. …”
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  19. 4959
    “…Current expectations for elastic scattering cross sections for neutralinos on protons are discussed with particular attention to satisfying all current accelerator constraints as well as insuring a sufficient cosmological relic density to account for the dark matter in the Universe.…”
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  20. 4960
    “…We combine these constraints with those due to the cosmological density of stable supersymmetric relic particles. …”
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    Enlace del recurso
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