Zobrazeno 1 - 10
of 109
pro vyhledávání: '"García, Marcos A. G."'
Autor:
Choi, Gongjun, Garcia, Marcos A. G., Ke, Wenqi, Mambrini, Yann, Olive, Keith A., Verner, Sarunas
We study the effects on particle production of a Planck-suppressed coupling between the inflaton and a scalar dark matter candidate, $\chi$. In the absence of this coupling, the dominant source for the relic density of $\chi$ is the long wavelength m
Externí odkaz:
http://arxiv.org/abs/2406.06696
Autor:
Garcia, Marcos A. G., Pierre, Mathias
After cosmic inflation, coherent oscillations of the inflaton field about a monomial potential $V(\phi)\sim \phi^k$ result in an expansion phase characterized by a stiff equation-of-state $w\simeq(k-2)/(k+2)$. Sourced by the oscillating inflaton cond
Externí odkaz:
http://arxiv.org/abs/2404.16932
We consider the decay of the inflaton in Starobinsky-like models arising from either an $R+R^2$ theory of gravity or $N=1$ no-scale supergravity models. If Standard Model matter is simply introduced to the $R + R^2$ theory, the inflaton (which appear
Externí odkaz:
http://arxiv.org/abs/2404.14545
Publikováno v:
Marcos A.G. Garcia and Aline Pereyra-Flores JCAP08(2024)043
The prediction of a nearly scale-invariant spectrum of curvature and tensor fluctuations is among the main features of cosmic inflation. The current measurements of the primordial fluctuations in the cosmic microwave background (CMB) provide tight co
Externí odkaz:
http://arxiv.org/abs/2403.04848
We consider the effects of a bare mass term for the inflaton, when the inflationary potential takes the form $V(\phi)= \lambda \phi^k$ about its minimum with $k \ge 4$. We concentrate on $k=4$, but discuss general cases as well. Further, we assume $\
Externí odkaz:
http://arxiv.org/abs/2402.16958
Autor:
Baur, Alexander, Garcia, Marcos A. G., Henriquez-Ortiz, Raul, Hernandez-Neri, Mauricio, Ramos-Sanchez, Saul
Forthcoming missions probing the absolute intensity of the CMB are expected to be able to measure spectral distortions, which are deviations from its blackbody distribution. As cosmic inflation can induce spectral distortions, these experiments offer
Externí odkaz:
http://arxiv.org/abs/2310.13071
Autor:
Garcia, Marcos A. G., Gross, Mathieu, Mambrini, Yann, Olive, Keith A., Pierre, Mathias, Yoon, Jong-Hyun
We consider the effects of fragmentation on the post-inflationary epoch of reheating. In simple single field models of inflation, an inflaton condensate undergoes an oscillatory phase once inflationary expansion ends. The equation of state of the con
Externí odkaz:
http://arxiv.org/abs/2308.16231
Building on the success of the Starobinsky model in describing the inflationary period of the universe, we investigate two simple generalizations of this model and their constraints imposed by the reheating epoch. The first generalization takes the f
Externí odkaz:
http://arxiv.org/abs/2306.15831
Autor:
Garcia, Marcos A. G., Pierre, Mathias
In the presence of self-interactions, the post-inflationary evolution of the inflaton field is driven into the non-linear regime by the resonant growth of its fluctuations. The once spatially homogeneous coherent inflaton is converted into a collecti
Externí odkaz:
http://arxiv.org/abs/2306.08038
Conventional scenarios of purely gravitationally produced dark matter with masses below the Hubble parameter at the end of inflation are in tension with Cosmic Microwave Background (CMB) constraints on the isocurvature power spectrum. We explore a mo
Externí odkaz:
http://arxiv.org/abs/2305.14446