52 citations · 52 across the 1 of their papers we have counts for
23 papers
Gravitational Positivity Bounds on Scalar Potentials
Toshifumi Noumi, Junsei Tokuda
We derive constraints on scalar field theories coupled to gravity by using recently developed positivity bounds in the presence of gravity. It is found that a canonically-normalize…
Is the Standard Model in the Swampland? Consistency Requirements from Gravitational Scattering
Katsuki Aoki, Tran Quang Loc, Toshifumi Noumi +1
We study compatibility of the Standard Model of particle physics and General Relativity by means of gravitational positivity bounds, which provide a necessary condition for a low-e…
Perturbative unitarity in quasi-single field inflation
Suro Kim, Toshifumi Noumi, Keito Takeuchi +1
We study implications of perturbative unitarity for quasi-single field inflation with the inflaton and one massive scalar. Analyzing high energy scattering, we show that non-Gaussi…
Proof of new S-matrix formula from classical solutions in open string field theory (or, Deriving on-shell open string field amplitudes without using Feynman rules, Part II)
Toru Masuda, Hiroaki Matsunaga, Toshifumi Noumi
We study relation between the gauge invariant quantity obtained in [arXiv:1908.09784] and the Feynman diagrams in the dressed gauge in the open cubic string field…
Wavefunctions in dS/CFT revisited: principal series and double-trace deformations
Hiroshi Isono, Hoiki Madison Liu, Toshifumi Noumi
We study wavefunctions of heavy scalars on de Sitter spacetime and their implications to dS/CFT correspondence. In contrast to light fields in the complementary series, heavy field…
invariant Fierz-Pauli massive gravity
Toshifumi Noumi, Kaishu Saito, Jiro Soda +1
We consider an invariant massive deformation of double field theory at the level of free theory. We study Kaluza-Klein reduction on and…