Results 111 to 120 of about 20,263 (249)

Oscillations During Inflation and the Cosmological Density Perturbations [PDF]

, 2001
Adiabatic (curvature) perturbations are produced during a period of cosmological inflation that is driven by a single scalar field, the inflaton. On particle physics grounds -- though -- it is natural to expect that this scalar field is coupled to other ...
A. Guth, A. Guth, A. Linde, A. Riotto, A. Starobinsky, A.A. Starobinsky, A.D. Linde, A.D. Linde, C. Gordon, D. Langlois, D. Langlois, D. Polarski, D. Polarsky, D. Salopek, D.H. Lyth, D.H. Lyth, E. Halyo, G.F. Giudice, H. Kodama, J. Yokoyama, J.-C. Hwang, J.A. Casas, J.M. Bardeen, J.M. Stewart, K. Yamamoto, L. Kofman, L.A. Kofman, L.A. Kofman, M. Bucher, M. Bucher, M. Kawasaki, M. Sasaki, M. Sasaki, N. Bartolo, P. Binétruy, P.J.E. Peebles, P.J.E. Peebles, P.J.E. Peebles, S. Matarrese, S. Mollerach, S. Mollerach, S.W. Hawking, T.J. Allen, T.S. Bunch, V. Lukash, V.F. Mukhanov, V.F. Mukhanov, W.H. Kinney   +47 more
core   +2 more sources

Non-minimal Higgs inflation in the context of warm scenario in the light of Planck data

European Physical Journal C: Particles and Fields, 2018
We investigate the non-minimally Higgs inflaton (HI) model in the context of warm inflation scenario. Warm little inflaton (WLI) model considers the little Higgs boson as inflaton.
Vahid Kamali
doaj   +1 more source

Non-minimally coupled quartic inflation with Coleman-Weinberg one-loop corrections in the Palatini formulation

Physics Letters B, 2020
We discuss how the non-minimal coupling ξϕ2R between the inflaton and the Ricci scalar affects the predictions of single field inflation models in the Palatini formalism.
Nilay Bostan
doaj   +1 more source

Rapid roll Inflation with Conformal Coupling

, 2008
Usual inflation is realized with a slow rolling scalar field minimally coupled to gravity. In contrast, we consider dynamics of a scalar with a flat effective potential, conformally coupled to gravity.
A. D. Linde, Lev Kofman, R. Kallosh, Shinji Mukohyama   +3 more
core   +2 more sources

Running-mass models of inflation, and their observational constraints [PDF]

, 1998
If the inflaton sector is described by softly broken supersymmetry, and the inflaton has unsuppressed couplings, the inflaton mass will run strongly with scale. Four types of model are possible.
A. M. Green, A. R. Liddle, David H. Lyth, E. D. Stewart, E. D. Stewart, E. J. Copeland, Laura Covi   +6 more
core   +2 more sources

Dark photon dark matter from charged inflaton [PDF]

, 2021
Hassan Firouzjahi, Mohammad Ali Gorji, Shinji Mukohyama, Borna Salehian   +3 more
openalex   +1 more source

Lower bound of the tensor-to-scalar ratio r≳0.1 in a nearly quadratic chaotic inflation model in supergravity

Physics Letters B, 2015
We consider an initial condition problem in a nearly quadratic chaotic inflation model in supergravity. We introduce shift symmetry breaking not only in the superpotential but also in the Kahler potential.
Keisuke Harigaya, Masahiro Kawasaki, Tsutomu T. Yanagida   +2 more
doaj   +1 more source

Higher order terms in the inflaton potential and the lower bound on the tensor to scalar ratio r

, 2009
The MCMC analysis of the CMB+LSS data in the context of the Ginsburg-Landau approach to inflation indicated that the fourth degree double--well inflaton potential best fits the present CMB and LSS data.
Alabidi, Alabidi, Boubekeur, Boyanovsky, Boyanovsky, Boyanovsky, Boyanovsky, Boyanovsky, Boyanovsky, Boyanovsky, Boyle, Bridges, Burigana, C. Destri, Chen, Cirigliano, Destri, Dodelson, Easther, Easther, Eriksen, Finelli, Ginsburg, Ginsburg, Ginsburg, H.J. de Vega, Hinshaw, Hoffman, Hu, Huffenberger, Huffenberger, Kadota, Kinney, Kinney, Kinney, Kinney, Kohri, Kolb, Komatsu, Kosowsky, Landau, Landau, Lidsey, Lifshitz, Lin, Lyth, N.G. Sanchez, Nolta, Peiris, Powel, Ramirez, Savage, Spalinski   +52 more
core   +3 more sources

An inflationary probe of cosmic Higgs switching

Journal of High Energy Physics, 2020
A scalar Higgs field can be repeatedly switched on and off when it couples to a classically oscillating scalar modulus field. The modulus flips the Higgs mass term between stable and tachyonic values.
JiJi Fan, Matthew Reece, Yi Wang
doaj   +1 more source

Density Fluctuations in the Oscillatory Phase of Nonclassical Inflaton in FRW Universe

, 2007
Using coherent and squeezed state formalisms of quantum optics for a minimally coupled non-classical inflaton in the FRW mertic is studied, in semiclassical theory of gravity.
Caves C. M., Dongsu Bak B., Gasperini M., K. K. VENKATARATNAM, Kim S. P., Kuo C., P. K. SURESH, Suresh P. K.   +7 more
core   +1 more source