Theory Seminar (High Energy/Cosmology)

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Events During the Week of October 14th through October 21st, 2018

Monday, October 15th, 2018

No events scheduled

Tuesday, October 16th, 2018

No events scheduled

Wednesday, October 17th, 2018

No events scheduled

Thursday, October 18th, 2018

No events scheduled

Friday, October 19th, 2018

Consistency relations in multi-field inflation
Time: 2:00 pm - 3:25 pm
Place: 5310 Chamberlin Hall
Speaker: Jinn-Ouk Gong, KASI
Abstract: The consequences of spatial coordinate transformation in multi-field inflation are studied. Among the spontaneously broken de Sitter isometries, only dilatation in the comoving gauge preserves the form of the metric and thus results in quantum-protected Slavnov-Taylor identities. The corresponding consistency relations between correlation functions of cosmological perturbations are derived in two different ways, by the connected and one-particle-irreducible Green's functions. The lowest-order consistency relations are explicitly given, and even in multi-field inflation the consistency relations in the soft limit are independent of the detail of the matter sector.
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