A minimal inflation scenario

Journal Article · Tue Mar 01 04:00:00 EST 2011 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2011/03/027· OSTI ID:22275498

Álvarez-Gaumé, Luis ^[1]; Gómez, César ^[2]; Jimenez, Raul ^[3]

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1. Theory Group, Physics Department, CERN, CH-1211, Geneva 23 (Switzerland)
2. Physics Department and Instituto de Fisica Teorica UAM/CSIC, 28049 Cantoblanco, Madrid (Spain)
3. ICREA and ICC, University of Barcelona (IEEC-UB), Marti i Franques 1, Barcelona 08028 (Spain)

We elaborate on a minimal inflation scenario based entirely on the general properties of supersymmetry breaking in supergravity models. We identify the inflaton as the scalar component of the Goldstino superfield. We write plausible candidates for the effective action describing this chiral superfield. In particular the theory depends (apart from parameters of O(1)) on a single free parameter: the scale of supersymmetry breaking. This can be fixed using the amplitude of CMB cosmological perturbations and we therefore obtain the scale of supersymmetry breaking to be 10{sup 12−14} GeV. The model also incorporates explicit R-symmetry breaking in order to satisfy the slow roll conditions. In our model the η−problem is solved without extra fine-tuning. We try to obtain as much information as possible in a model independent way using general symmetry properties of the theory's effective action, this leads to a new proposal on how to exit the inflationary phase and reheat the Universe.

• OSTI ID: 22275498
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 03 Vol. 2011; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ACTION INTEGRAL
CHIRALITY
COSMOLOGY
DISTURBANCES
EEV RANGE
INFLATIONARY UNIVERSE
INFLATONS
O GROUPS
RELICT RADIATION
SUPERGRAVITY
SYMMETRY BREAKING
UNIVERSE