Search results for "AFFINE VARIATIONAL-PRINCIPLES"

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Critical point Higgs inflation in the Palatini formulation

2021

We study Higgs inflation in the Palatini formulation with the renormalisation group improved potential in the case when loop corrections generate a feature similar to an inflection point. Assuming that there is a threshold correction for the Higgs quartic coupling $\lambda$ and the top Yukawa coupling $y_t$, we scan the three-dimensional parameter space formed by the two jumps and the non-minimal coupling $\xi$. The spectral index $n_s$ can take any value in the observationally allowed range. The lower limit for the running is $\alpha_s>-3.5\times10^{-3}$, and $\alpha_s$ can be as large as the observational upper limit. Running of the running is small. The tensor-to-scalar ratio is $2.2\tim…

Nuclear and High Energy PhysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)FOS: Physical sciencesRIEMANNGeneral Relativity and Quantum Cosmology (gr-qc)Parameter spaceINITIAL CONDITIONSkosmologia01 natural sciences114 Physical sciencesGeneral Relativity and Quantum CosmologyEINSTEINCritical point (thermodynamics)0103 physical sciencesRenormalization Grouplcsh:Nuclear and particle physics. Atomic energy. Radioactivityteoreettinen fysiikkaGENERAL-RELATIVITY010306 general physicscosmology of theories beyond the SMDISSIPATIONBosonMathematical physicsInflation (cosmology)Physics010308 nuclear & particles physicsYukawa potentialCONSTRAINTSBOSONGRAVITATIONRenormalization groupAFFINE VARIATIONAL-PRINCIPLESCosmology of Theories beyond the SMInflection pointHiggs bosonSCALARONlcsh:QC770-798renormalization groupAstrophysics - Cosmology and Nongalactic AstrophysicsJournal of High Energy Physics
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