Palatini double-well and Coleman-Weinberg potentials with non-minimal coupling

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BOSTAN N.

Journal of Cosmology and Astroparticle Physics, cilt.2021, sa.4, 2021 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2021 Sayı: 4
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1088/1475-7516/2021/04/042
  • Dergi Adı: Journal of Cosmology and Astroparticle Physics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, INSPEC, zbMATH
  • Anahtar Kelimeler: inflation, physics of the early universe, quantum cosmology
  • Marmara Üniversitesi Adresli: Hayır

Özet

We present the impact of non-minimal coupling ξφ2 R on the inflationary parameters by taking into account the models of single-field inflation with the inflaton that has a non-zero vacuum expectation value (v) after the period of inflation in Palatini gravity. We discuss the well-known symmetry-breaking type potentials, namely the double-well potential and Coleman-Weinberg potential. We show that the inflationary predictions, n s and r, of these potentials for both φ > v and φ < v inflation are compatible with the recent measurements within the regions of the v-ξ plane. Finally, we take into account the inflationary predictions of Coleman-Weinberg potential for selected ξ values as a function of v in the Palatini formalism.