Hiroyuki Ishida

activity

20102024

most citedMixing of Active and Sterile Neutrinos

91 citations · 865 across the 52 of their papers we have counts for

collaborators

Showing 2013Show all

4 papers · 1 filter

hep-ph2013★ 15 cited

Longevity Problem of Sterile Neutrino Dark Matter

Hiroyuki Ishida, Kwang Sik Jeong, Fuminobu Takahashi

Sterile neutrino dark matter of mass O(1-10) keV decays into an active neutrino and an X-ray photon, and the non-observation of the corresponding X-ray line requires the sterile ne…

hep-ph2013

CKM matrix and flavor symmetries

Takeshi Araki, Hiroyuki Ishida, Hajime Ishimori +2

Following the way proposed recently by Hernandez and Smirnov, we seek possible residual symmetries in the quark sector with a focus on the von Dyck groups. We begin with two extrem…

hep-ph2013★ 1 cited

Effective Valence Quark Model and a Possible Dip in $d B r (B \to K ℓ ℓ ˉ) / d q^{2}$

Hiroyuki Ishida, Yoshio Koide

In rare $B$ meson decays $B \to K ℓ^{+} ℓ^{-}$ , a possible contribution of $ℓ^{+} ℓ^{-}$ emission via photon from the "spectator" quark $q$ ( $q = u, d$ ) in the $B$ meson $(q…

hep-ph2013

Partial Mass Degenerated Model and Spontaneous CP Violation in the Leptonic Sector

Hiroyuki Ishida

We have investigated a flavour model [1] which inspired by small squared-mass difference measured in solar neutrino oscillation experiments and observability in neutrinoless double…

Longevity Problem of Sterile Neutrino Dark Matter

CKM matrix and flavor symmetries

Effective Valence Quark Model and a Possible Dip in dBr(B→Kℓℓˉ)/dq2

Partial Mass Degenerated Model and Spontaneous CP Violation in the Leptonic Sector

Effective Valence Quark Model and a Possible Dip in $d B r (B \to K ℓ ℓ ˉ) / d q^{2}$