Speaker
Dhong Yeon Cheong
(Yonsei University)
Description
This work investigates the possibility that our inflation originates from a composite theory. Taking an $SU(N_c)$ gauge theory with $N_f$ fermions in the fundamental representation, we consider an effective chiral Lagrangian involving a dilaton and pions. The walking dynamics of the theory constrain the potential specifics. We identify the dilaton as the inflaton, which resembles a hybrid inflation with the pions acting as a waterfall field in the potential. Analyzing the inflationary dynamics, we find a parameter region supporting small-field inflation compatible with Planck 2018 inflationary observables. We further discuss possible phenomenological consequences of this theory.
| Secondary category for the parallel session (optional) | BSM Theories |
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Primary author
Dhong Yeon Cheong
(Yonsei University)
Co-authors
Giacomo Cacciapaglia
(IP2I)
Seong Chan Park
(Yonsei University)
Aldo Deandrea
(IP2I)
Wanda Isnard
(ENS de Lyon)
