NON-GAUSSIANITY AND LOOP CORRECTIONS IN A QUADRATIC TWO-FIELD SLOW-ROLL MODEL OF INFLATION. PART 11
Vol. 32 No. 125 (2008), Physical Sciences
Vol. 32 No. 125 (2008)

NON-GAUSSIANITY AND LOOP CORRECTIONS IN A QUADRATIC TWO-FIELD SLOW-ROLL MODEL OF INFLATION. PART 11

Physical Sciences
https://doi.org/10.18257/raccefyn.32(125).2008.2339
Published 2023-12-02
Heiner R. S. Cogollo
Escuela de Física, Universidad Industrial de Santander, Ciudad Universitaria, Bucaramanga, Colombia
Y. Rodríguez
Centro de Investigaciones, Universidad Antonio Nariño, Cra 3 Este No. 47A-15, Bogotá D.C., Colombia
César A. Valenzuela-Toledo
Escuela de Física, Universidad Industrial de Santander, Ciudad Universitaria, Bucaramanga, Colombia
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How to Cite

Cogollo, H. R. S., Rodríguez, Y., & Valenzuela-Toledo, C. A. (2023). NON-GAUSSIANITY AND LOOP CORRECTIONS IN A QUADRATIC TWO-FIELD SLOW-ROLL MODEL OF INFLATION. PART 11. Revista De La Academia Colombiana De Ciencias Exactas, Físicas Y Naturales, 32(125), 515–526. https://doi.org/10.18257/raccefyn.32(125).2008.2339
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Abstract

We calculate the trispectrum Tζ (k1 , k2 , k3, k4) of the primordial curvature perturbation ζ, gener­ated during a slow-roll inflationary epoch and considering a quadratic two-component scalar potential and canonical kinetic terms. We consider one-loop and tree leve] contlibutions, and show that it is pos­sible to attain observable values for the leve! of non-gaussianity T N L, if Tζ; is dominated by the one-loop contlibution. This work is performed by taking into account that there exists sorne physical restrictions that constrain the available parameter window. Such conditions are: thc existence of sorne coupling constants that guarantee the calculation in a perturbative regime, the relative weight of the one-loop and tree leve! contributions, the normalisation of the spectrum, the observed spectral index, and the mini mal amount of inflation required to solve the horizon problem.

https://doi.org/10.18257/raccefyn.32(125).2008.2339

Keywords

primordial curvature perturbation | non-gaussianity | slow-roll inflationary models.
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References

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