423 citations · 1.8k across the 30 of their papers we have counts for
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Phenomenological Consequences of the Refined Swampland Conjecture
Hajime Fukuda, Ryo Saito, Satoshi Shirai +1
We discuss phenomenological consequences of the recently-introduced refinements of the de Sitter swampland conjecture. The conjecture constraints the first and the second derivativ…
Heavy Particle Signatures in Cosmological Correlation Functions with Tensor Modes
Ryo Saito, Takahiro Kubota
We explore the possibility to make use of cosmological data to look for signatures of unknown heavy particles whose masses are on the order of the Hubble parameter during the time…
Chameleon Field in a Spherical Shell System
Tomohiro Nakamura, Taishi Ikeda, Ryo Saito +1
We investigate the validity of screening mechanism of the fifth force for chameleon field in highly inhomogeneous density profile. For simplicity, we consider a static and spherica…
Cosmological correlation functions including a massive scalar field and an arbitrary number of soft-gravitons
Ryo Saito
We study the imprint of a massive scalar particle on cosmological correlation functions, and suggest the way to determine the mass of the newly introduced particle, which is expect…