TY - JOUR
T1 - Non-oscillatory no-scale inflation
AU - Ellis, John
AU - Nanopoulos, Dimitri V.
AU - Olive, Keith A.
AU - Verner, Sarunas
N1 - Publisher Copyright:
© 2021 IOP Publishing Ltd and Sissa Medialab.
PY - 2021/3
Y1 - 2021/3
N2 - We propose a non-oscillatory no-scale supergravity model of inflation (NO-NO inflation) in which the inflaton does not oscillate at the end of the inflationary era. Instead, the Universe is then dominated by the inflaton kinetic energy density (kination). During the transition from inflation to kination, the Universe preheats instantly through a coupling to Higgs-like fields. These rapidly annihilate and scatter into ultra-relativistic matter particles, which subsequently dominate the energy density, and reheating occurs at a temperature far above that of Big Bang Nucleosynthesis. After the electroweak transition, the inflaton enters a tracking phase as in some models of quintessential inflation. The model predictions for cosmic microwave background observables are consistent with Planck 2018 data, and the density of gravitational waves is below the upper bound from Big Bang Nucleosynthesis. We also find that the density of supersymmetric cold dark matter produced by gravitino decay is consistent with Planck 2018 data over the expected range of supersymmetric particle masses.
AB - We propose a non-oscillatory no-scale supergravity model of inflation (NO-NO inflation) in which the inflaton does not oscillate at the end of the inflationary era. Instead, the Universe is then dominated by the inflaton kinetic energy density (kination). During the transition from inflation to kination, the Universe preheats instantly through a coupling to Higgs-like fields. These rapidly annihilate and scatter into ultra-relativistic matter particles, which subsequently dominate the energy density, and reheating occurs at a temperature far above that of Big Bang Nucleosynthesis. After the electroweak transition, the inflaton enters a tracking phase as in some models of quintessential inflation. The model predictions for cosmic microwave background observables are consistent with Planck 2018 data, and the density of gravitational waves is below the upper bound from Big Bang Nucleosynthesis. We also find that the density of supersymmetric cold dark matter produced by gravitino decay is consistent with Planck 2018 data over the expected range of supersymmetric particle masses.
KW - inflation
KW - supersymmetry and cosmology
UR - http://www.scopus.com/inward/record.url?scp=85103654396&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85103654396&partnerID=8YFLogxK
U2 - 10.1088/1475-7516/2021/03/052
DO - 10.1088/1475-7516/2021/03/052
M3 - Article
AN - SCOPUS:85103654396
SN - 1475-7516
VL - 2021
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
IS - 3
M1 - 052
ER -