93 citations · 196 across the 14 of their papers we have counts for
14 papers
Hamilton-Jacobi Approach to Inflationary Scenarios through Extended Entropies: An Observational Perspective
H R M Zarandi, Esmaiel Ebrahimi, Yo Toda
The slow-roll inflation paradigm can be systematically generalized within the framework of non-standard entropy formalisms, giving rise to a broad class of inflationary models that…
Signatures of Modified Gravity on Linear Scales in a Dynamical Dark Energy Background
Yo Toda, Adrià Gómez-Valent
Cosmological data from the cosmic microwave background (CMB), baryon acoustic oscillations, and Type Ia supernovae suggest that the component driving the accelerated expansion of t…
Constraints on the varying electron mass and early dark energy in light of ACT DR6 and DESI DR2 and the implications for inflation
Yo Toda, Osamu Seto
Primarily motivated by the Hubble tension, we analyze the varying electron mass model and axionlike early dark energy model (EDE) using baryon acoustic oscillation data from DESI D…
Constraints on the simultaneous variation of the fine structure constant and electron mass in light of DESI BAO data
Yo Toda, Osamu Seto
We study the cosmological constraints of the time variation of the electron mass and the fine-structure constant , using data of cosmic microwave background, supernovae li…
Redshift-space distortion constraints on the neutrino mass and models to alleviate the Hubble tension
Yo Toda, Osamu Seto
We discuss the neutrino mass and Hubble tension solutions and examine their effects on the redshift-space distortion (RSD) observations. An analysis with RSD data indicates smaller…
Efficient Compression of Redshift-Space Distortion Data for Late-Time Modified Gravity Models
Yo Toda, Adrià Gómez-Valent, Kazuya Koyama
Current cosmological observations allow for deviations from the standard growth of large-scale structures in the universe. These deviations could indicate modifications to General…
DESI constraints on the varying electron mass model and axion-like early dark energy
Osamu Seto, Yo Toda
Baryon acoustic oscillation (BAO) is one of the important standard rulers in cosmology. The results of the latest BAO measurements by Dark Energy Spectroscopic Instrument (DESI) su…
Constraints on sterile neutrinos and the cosmological tensions
Supriya Pan, Osamu Seto, Tomo Takahashi +1
We investigate cosmological bounds on sterile neutrino masses in the light of the Hubble and tensions. We argue that non-zero masses for sterile neutrinos are inferred at 2$σ…
Impact of big bang nucleosynthesis on the H0 tension
Tomo Takahashi, Yo Toda
We investigate the impact of big bang nucleosynthesis (BBN) on the Hubble tension, focusing on how the treatment of the reaction rate and observational data affect the evaluation o…
Variation of the fine structure constant in the light of recent helium abundance measurement
Osamu Seto, Tomo Takahashi, Yo Toda
We point out that the recent result of primordial helium-4 (He) abundance measurement by EMPRESS, which has reported a smaller He abundance than other measurements, can be…
Big Bang Nucleosynthesis constraints on varying electron mass solution to the Hubble tension
Osamu Seto, Yo Toda
A cosmological model with a time-varying mass of electrons seems a promising solution for the so-called Hubble tension. We examine the big bang nucleosynthesis (BBN) constraints on…
Electron mass variation from dark sector interactions and compatibility with cosmological observations
Kouki Hoshiya, Yo Toda
We investigate the model where electrons and dark matter interact with dark energy through the rolling of a scalar field which comes from extra dimensional theories such as the bra…
Hubble tension in lepton asymmetric cosmology with an extra radiation
Osamu Seto, Yo Toda
We study the fit of cosmological models with two additional free parameters and in addition to the parameters of CDM. We introduce extra radiation compone…
Comparing early dark energy and extra radiation solutions to the Hubble tension with BBN
Osamu Seto, Yo Toda
The shorten sound horizon scale at the recombination epoch by introducing extra energy components such as the extra radiation or early dark energy (EDE) is a simple approach to so-…