Conformal inflation in the metric-affine geometry. (30th December 2020)
- Record Type:
- Journal Article
- Title:
- Conformal inflation in the metric-affine geometry. (30th December 2020)
- Main Title:
- Conformal inflation in the metric-affine geometry
- Authors:
- Mikura, Y.
Tada, Y.
Yokoyama, S. - Abstract:
- Abstract: Systematic understanding for classes of inflationary models is investigated from the viewpoint of the local conformal symmetry and the slightly broken global symmetry in the framework of the metric-affine geometry. In the metric-affine geometry, which is a generalisation of the Riemannian one adopted in the ordinary General Relativity, the affine connection is an independent variable of the metric rather than being given, e.g., by the Levi-Civita connection as its function. Thanks to this independency, the metric-affine geometry can preserve the local conformal symmetry in each term of the Lagrangian contrary to the Riemannian geometry, and then the local conformal invariance can be compatible with much more kinds of global symmetries. As simple examples, we consider the two-scalar models with the broken SO (1, 1) or O (2), leading to the well-known α -attractor or natural inflation, respectively. The inflaton, can be understood as their pseudo–Nambu-Goldstone boson.
- Is Part Of:
- Europhysics letters. Volume 132:Number 3(2020)
- Journal:
- Europhysics letters
- Issue:
- Volume 132:Number 3(2020)
- Issue Display:
- Volume 132, Issue 3 (2020)
- Year:
- 2020
- Volume:
- 132
- Issue:
- 3
- Issue Sort Value:
- 2020-0132-0003-0000
- Page Start:
- Page End:
- Publication Date:
- 2020-12-30
- Subjects:
- 98.80.Cq -- 04.50.Kd
Physics -- Periodicals
Electronic journals
530.05 - Journal URLs:
- http://epljournal.edpsciences.org ↗
http://iopscience.iop.org/0295-5075 ↗
http://www.iop.org/ ↗
http://www.edpsciences.com/euro ↗ - DOI:
- 10.1209/0295-5075/132/39001 ↗
- Languages:
- English
- ISSNs:
- 0295-5075
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 15580.xml