AT7 - Theories of gravity: alternatives to the cosmological and particle standard models |
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Speaker |
Marciano , Antonino |
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Coauthors |
Andrea Addazi & Pisin Chen |
| Talk Title |
Emergent inflation from a Nambu–Jona-Lasinio mechanism in gravity with non-dynamical torsion |
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Abstract |
We discuss how inflation can emerge from a four-fermion interaction induced by torsion. Inflation can arise from coupling torsion to Standard Model fermions, without any need of introducing new scalar particles beyond the Standard Model. Within this picture, the inflaton field can be a composite field of the SM-particles and arises from a Nambu-Jona-Lasinio mechanism in curved space-time, non-minimally coupled with the Ricci scalar. The model we specify predicts small value of the r- parameter, namely r ∼ 10−3 − 10−2, which nonetheless would be detectable by the next generation of experiments, including BICEP 3 and the ALI-CMB projects. |
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Talk view |
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