6 papers
Coherent collective response in many-qubit systems for dark matter detection
Ryuichiro Kitano, Ryoto Takai
We propose an array of Ramsey-type interferometers using superposition states, , as a sensor to detect wave-like dark matter. Af…
Impact of matter effects on the unitarity test of lepton mixing
Ryuichiro Kitano, Joe Sato, Sho Sugama
Testing the unitarity of the lepton mixing matrix, in a manner analogous to the unitarity tests of the CKM matrix in the quark sector, is an important step toward probing physics b…
Lepton number violating signals of a parity symmetric model at TRISTAN
Keisuke Harigaya, Ryuichiro Kitano, Ryoto Takai
The parity solution to the strong CP problem necessarily extends the Standard Model to include the SU gauge sector and imposes restrictions on the structure of the Yuk…
Unitarity test of lepton mixing via energy dependence of neutrino oscillation
Ryuichiro Kitano, Joe Sato, Sho Sugama
We study the method to test the unitarity of the lepton mixing matrix by using only the long baseline neutrino oscillation experiments, such as the combination of the T2HK experime…
UV cut-off of the Standard Model and proton decays
Ryuichiro Kitano, Shohei Okawa
Non-observation of proton decays as well as the smallness of the neutrino masses can naturally be explained by the accidental baryon and lepton number symmetry in the Standard Mode…
Heavy Neutral Lepton at Same-Sign Muon Collider
Ryuichiro Kitano, Ian Low, Ryutaro Matsudo +2
We explore the discovery potential of heavy neutral leptons (HNLs), motivated by models addressing the origin of neutrino masses, at the proposed high-energy same-sign muon collide…