16 citations · 46 across the 7 of their papers we have counts for
7 papers
Off-shell reduction in 4D conformal supergravity
Yusuke Yamada
We discuss reduction in four dimensional conformal supergravity. In particular, we keep the off-shell structure of supermultiplets (except hypermultiplets). As we will…
Simple Sinflaton-less -attractors
Renata Kallosh, Yusuke Yamada
We construct the simplest inflationary -attractor models in supergravity: it has only one scalar, the inflaton. There is no sinflaton since the inflaton belongs to an orthogonal…
More on DBI action in 4D supergravity
Shuntaro Aoki, Yusuke Yamada
We construct a Dirac-Born-Infeld (DBI) action coupled to a two-form field in four dimensional supergravity. Our superconformal formulation of the action shows a uni…
Note on "Equivalence Between Different Auxiliary Field Formulations of Supergravity Coupled to Matter"
Shuntaro Aoki, Yusuke Yamada
In the version 1 of this paper, we claimed that 4D supergravity formulations with different auxiliary fields can be unified using U(1) gauge symmetry, whose gauge supe…
Cosmological relaxation and high scale inflation
Tetsutaro Higaki, Naoyuki Takeda, Yusuke Yamada
We study whether the relaxion mechanism solves the Higgs hierarchy problem against a high scale inflation or a high reheating temperature. To accomplish the mechanism, we consider…
Inflation in supergravity without Kahler potential
Shuntaro Aoki, Yusuke Yamada
We propose a new class of inflation models in supergravity with higher derivative terms. In those models, the Kähler potential does not contain the inflaton multiplet, but a supers…