Zobrazeno 1 - 10
of 1 025
pro vyhledávání: '"Olive, Keith"'
Based on a previously derived superstring model possessing a cosmological sector that mimics Starobinsky inflation, we analyze several questions addressed in the recent literature: the generation of an effective $R^2$-term, the stability of the sgold
Externí odkaz:
http://arxiv.org/abs/2410.16541
The expected improvements in the precision of inflationary physics observables including the scalar spectral index $n_{s}$ and the tensor-to-scalar ratio $r$ will reveal more than just the viability of a particular model of inflation. In the presence
Externí odkaz:
http://arxiv.org/abs/2409.08279
We study the anomalous magnetic moment of the muon, $g_\mu - 2 \equiv 2 a_\mu$, in the context of supersymmetric models beyond the CMSSM, where the unification of either the gaugino masses $M_{1,2,3}$ or sfermion and Higgs masses is relaxed, taking i
Externí odkaz:
http://arxiv.org/abs/2407.08679
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
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
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 $\
Externí odkaz:
http://arxiv.org/abs/2402.16958
The inflationary reheating phase begins when accelerated expansion ends. As all Standard Model particles are coupled to gravity, gravitational interactions will lead to particle production. This includes the thermal bath, dark matter and gravitationa
Externí odkaz:
http://arxiv.org/abs/2402.04310
We compute the density of a spin-$\frac32$ particle, the raritron, produced at the end of inflation due to gravitational interactions. We consider a background inflaton condensate as the source of this production, mediated by the exchange of a gravit
Externí odkaz:
http://arxiv.org/abs/2309.15146
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
Electroweak loop corrections to the matrix elements for the spin-independent scattering of cold dark matter particles on nuclei are generally small, typically below the uncertainty in the local density of cold dark matter. However, as shown in this p
Externí odkaz:
http://arxiv.org/abs/2305.13837