Quantum Gravity Effect in Torsion Driven Inflation and CP violation

Abstract

We have derived an effective potential for inflationary scenario from torsion and quantum gravity correction in terms of the scalar field hidden in torsion. A strict bound on the CP violating $\theta$ parameter, $\mathcal{O}(10^{-10})<\theta <\mathcal{O}(10^{-9})$ has been obtained, using {\tt Planck+WMAP9} best fit cosmological parameters.

8 pages, 1 figure, Accepted for publication in JHEP

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• CMB from EFT
• COSMOS-$e^{\prime }$- soft Higgsotic attractors
• Non-parametric reconstruction of an inflaton potential from Einstein-Cartan-Sciama-Kibble gravity with particle production
• Cosmological spectrum of two-point correlation function from vacuum fluctuation of Stringy Axion field in De Sitter space: A study of the role of Quantum Entanglement
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• Einstein-Cartan pseudoscalaron inflation
• Entanglement negativity in de Sitter biverse from Stringy Axionic Bell pair: An analysis using Bunch-Davies vacuum
• Reconstructing inflationary potential from NANOGrav 15-year Data: A robust study using Non-Bunch Davies initial condition