منابع مشابه
Dark matter chaotic inflation in light of BICEP2
We propose an economical model in which a singlet Z2-odd scalar field accounts for the primordial inflation and the present dark matter abundance simultaneously in the light of recent BICEP2 result. Interestingly, the reheating temperature and the thermal dark matter abundance are closely connected by the same interaction between the singlet scalar and the standard model Higgs. In addition, the...
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The BICEP2 Collaboration reports a detection of primordial cosmic microwave background (CMB) B mode with a tensor-to-scalar ratio r = 0.20(-0.05)(+0.07) (68% C.L.). However, this result disagrees with the recent Planck limit r < 0.11 (95% C.L.) on constraining inflation models. In this Letter we consider an inflationary cosmology with a preceding nonsingular bounce, which gives rise to observab...
متن کاملViability of the matter bounce scenario in Loop Quantum Cosmology from BICEP2 last data
The CMB map provided by the Planck project constrains the value of the ratio of tensor-to-scalar perturbations, namely r, to be smaller than 0.11 (95 % CL). This bound rules out the simplest models of inflation. However, recent data from BICEP2 is in strong tension with this constrain, as it finds a value r = 0.20 −0.05 with r = 0 disfavored at 7.0σ, which allows these simplest inflationary mod...
متن کاملGravitino problem in supergravity chaotic inflation and SUSY breaking scale after BICEP2
Article history: Received 24 April 2014 Accepted 26 May 2014 Available online 2 June 2014 Editor: J. Hisano Gravitinos are generically produced by inflaton decays, which place tight constraints on inflation models as well as supersymmetry breaking scale. We revisit the gravitino production from decays of the inflaton and the supersymmetry breaking field, based on a chaotic inflation model sugge...
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We analyze primordial non-Gaussianity in single-field inflationary models when the tensor-to-scalar ratio is large. Our results show that detectable levels of non-Gaussianity f(NL) ∼ 50 are still possible in the simplest class of models described by the effective theory of inflation. However, the shape is very tightly constrained, making a sharp prediction that could be confirmed or falsified b...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics D
سال: 2014
ISSN: 0218-2718,1793-6594
DOI: 10.1142/s0218271814500709