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hep-th2020
Gapped Goldstones at the cut-off scale: a non-relativistic EFT
Gabriel Cuomo, Angelo Esposito, Emanuele Gendy +3
At finite density, the spontaneous breakdown of an internal non-Abelian symmetry dictates, along with gapless modes, modes whose gap is fixed by the algebra and proportional to the…
hep-th2018
Light Particles with Spin in Inflation
Lorenzo Bordin, Paolo Creminelli, Andrei Khmelnitsky +1
The existence of light particles with spin during inflation is prohibited by the Higuchi bound. This conclusion can be evaded if one considers states with a sizeable coupling with…