Non-minimally coupled Natural Inflation: Palatini and Metric formalism with the recent BICEP/Keck

BOSTAN N.

Journal of Cosmology and Astroparticle Physics, cilt.2023, sa.2, 2023 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2023 Sayı: 2
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1088/1475-7516/2023/02/063
  • 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
  • Marmara Üniversitesi Adresli: Hayır

Özet

In this work, we show the effect of the non-minimal coupling ξϕ 2 R on the inflationary parameters by considering the single-field inflation and present the inflationary predictions of the appealing potential for the particle physics viewpoint: Natural Inflation, an axion-like inflaton which has a cosine-type periodic potential and the inflaton naturally emerges as a pseudo-Nambu-Goldstone boson with a spontaneously broken global symmetry. We present the inflationary predictions for this potential, ns , r, and α = dns /d ln k. In addition, we assume standard thermal history after inflation, and using this, for considered potential, we show compatible regions for the ns , r within the recent BICEP/Keck results.