Y. Uesaka

activity

20152026

most citedModels of the Muonium to Antimuonium Transition

31 citations · 166 across the 22 of their papers we have counts for

collaborators

24 papers

hep-ph2026

Lepton number and flavor violation mediated by doubly charged scalars at $μ$ TRISTAN $μ^{+} μ^{+}$ collider

Takeshi Fukuyama, Yukihiro Mimura, Yuichi Uesaka

Charged lepton flavor violation is an important probe of physics beyond the Standard Model. Although $Δ L_{μ} = - Δ L_{e} = \pm 1$ lepton flavor violating (LFV) processes, such as $μ\to eγ…

nucl-th2026

Comprehensive table of calculated Huff factors

Yuichi Uesaka, Tomoya Naito, Shuichiro Ebata +1

We present a systematic calculation of the Huff factor for nuclei with atomic numbers ( $Z$ ) in the range of $6 \leq Z \leq 94$ . The Huff factor quantifies the increase in the p…

hep-ph2025

Probing Scalar-Mediator Quark Couplings via CLFV Lepton-Nucleon Scattering

Yuichiro Kiyo, Michihisa Takeuchi, Yuichi Uesaka +1

We investigate charged lepton flavor violating (CLFV) deep-inelastic scattering, focusing on the gluon-initiated subprocess $ℓ_{i} g \to ℓ_{j} g$ via the gluon effective operator…

hep-ph2024

$μ^{-} \to e^{-} γ$ in a muonic atom as a probe for effective lepton flavor violating operators involving photon fields

Yuichi Uesaka, Masato Yamanaka, Yoshitaka Kuno

We propose the $μ^{-} \to e^{-} γ$ process in a muonic atom as a novel means to investigate charged lepton flavor violation (CLFV). We demonstrate its sensitivity in probing effective CL…

hep-ph2023

Insights from the magnetic field dependence of the muonium-to-antimuonium transition

Takeshi Fukuyama, Yukihiro Mimura, Yuichi Uesaka

The muonium-to-antimuonium transition experiment is about to be updated. Notably, the experiment at J-PARC in Japan can explore the magnetic field dependence of the transition prob…

nucl-th2023

Electron wave functions in beta-decay formulas revisited (II): Completion including recoil-order and induced currents

W. Horiuchi, T. Sato, Y. Uesaka +1

We present complete formulas of the allowed and first-forbidden transitions of the nuclear beta decay taking into account the recoil-order and induced currents up to the next-to-le…

hep-ph2022★ 5 cited

Neutrinoless double beta decay and the muonium-to-antimuonium transition in models with a doubly charged scalar

Takeshi Fukuyama, Yukihiro Mimura, Yuichi Uesaka

The lepton number and flavor violations are important possible ingredients of the lepton physics. The neutrinoless double beta decay and the transition of the muonium into antimuon…

hep-ph2022★ 1 cited

Determination of coupling patterns by parallel searches for $μ^{-} \to e^{+}$ and $μ^{-} \to e^{-}$ in muonic atoms

Joe Sato, Kohei Sugawara, Yuichi Uesaka +1

We investigate a possibility that the $μ^{-} \to e^{+}$ conversion is discovered prior to the $μ^{-} \to e^{-}$ conversion, and its implications to the new physics search. We focus on the sp…

hep-ph2022★ 15 cited

Isotope dependence of muon-to-electron conversion

Julian Heeck, Robert Szafron, Yuichi Uesaka

The lepton-flavor-violating conversion of a muon into an electron in the field of a nucleus is one of the most sensitive probes of physics beyond the Standard Model and the experim…

hep-ph2022

Transverse positron polarization in the polarized $μ^{+}$ decay related with the muonium-to-antimuonium transition

Takeshi Fukuyama, Yukihiro Mimura, Yuichi Uesaka

The constructions of the new high-intensity muon beamlines are progressing in facilities around the world, and new physics searches related to the muons are expected. The facilitie…

hep-ph2021★ 12 cited

Isotope dependence of muon decay in orbit

Julian Heeck, Robert Szafron, Yuichi Uesaka

The decay $μ^{-} \to e^{-} ν ˉ_{e} ν_{μ}$ of a muon that is bound to a nucleus poses an unavoidable background for experiments such as Mu2e, COMET, and DeeMe searching for lepton-flavor-vi…

hep-ph2021★ 31 cited

Models of the Muonium to Antimuonium Transition

Takeshi Fukuyama, Yukihiro Mimura, Yuichi Uesaka

Muonium is a bound state composed of an antimuon and an electron, and it constitutes a hydrogen-like atom. Because of the absence of the hadronic matter in the bound state, the muo…

hep-ph2021★ 1 cited

Charged lepton flavor violation associated with heavy quark production in deep inelastic lepton-nucleon scattering via scalar exchange

Yuichiro Kiyo, Michihisa Takeuchi, Yuichi Uesaka +1

We study charged lepton flavor violation (CLFV) associated with heavy quark pair production in lepton-nucleon deep-inelastic scattering $ℓ_{i} N \to ℓ_{j} q q ˉ X$ . Here $\ell…

nucl-th2021★ 1 cited

Beta-decay formulas revisited (I): Gamow--Teller and spin-dipole contributions to allowed and first-forbidden transitions

W. Horiuchi, T. Sato, Y. Uesaka +1

We propose formulas of the nuclear beta-decay rate that are useful in a practical calculation. The decay rate is determined by the product of the lepton and hadron current densitie…

hep-ph2020★ 9 cited

Kinematical distributions of coherent neutrino trident production in gauged $L_{μ} - L_{τ}$ model

Takashi Shimomura, Yuichi Uesaka

We analyze the distributions of energy, opening angle and invariant mass in muonic neutrino trident production processes, $ν_{μ} \to ν_{μ} μ μ$ , in a minimal gauged $U(1)_{L_μ- L…

hep-ph2020★ 11 cited

A two-loop induced neutrino mass model, dark matter, and LFV processes $ℓ_{i} \to ℓ_{j} γ$ , and $μ e \to ee$ in a hidden local $U (1)$ symmetry

Takaaki Nomura, Hiroshi Okada, Yuichi Uesaka

We discuss a model based on a hidden $U (1)_{X}$ gauge symmetry in which neutrino mass is induced at two-loop level by effects of interactions among particles in hidden sector and the…

hep-ph2020★ 21 cited

Probing $μ e γ γ$ contact interactions with $μ \to e$ conversion

Sacha Davidson, Yoshitaka Kuno, Yuichi Uesaka +1

Contact interactions of a muon, an electron and two photons can contribute to the decay $μ \to e γ γ$ , but also to the conversion of a muon into an electron in the electric field of…

hep-ph2020★ 7 cited

Model identification in $μ^{-} \to e^{-}$ conversion with invisible boson emission using muonic atoms

Yuichi Uesaka

In this article, we investigate the $μ^{-} \to e^{-} X$ process in a muonic atom, where $X$ is a light neutral boson. By calculating the spectrum of the emitted electron for several case…

hep-ph2020★ 7 cited

A radiatively induced neutrino mass model with hidden local $U (1)$ and LFV processes $ℓ_{i} \to ℓ_{j} γ$ , $μ \to e Z^{'}$ and $μ e \to ee$

Takaaki Nomura, Hiroshi Okada, Yuichi Uesaka

We investigate a model based on hidden $U (1)_{X}$ gauge symmetry in which neutrino mass is induced at one-loop level by effects of interactions among particles in hidden sector and t…

hep-ph2019★ 3 cited

Momentum distribution of the electron pair from the charged lepton flavor violating process $μ^{-} e^{-} \to e^{-} e^{-}$ in muonic atoms with a polarized muon

Yoshitaka Kuno, Joe Sato, Toru Sato +2

The $μ^{-} e^{-} \to e^{-} e^{-}$ process in a muonic atom is one of the promising probes to study the charged lepton flavor violation (CLFV). We have investigated the angular distribution of…

hep-ph2017★ 13 cited

Improved analysis for $μ^{-} e^{-} \to e^{-} e^{-}$ in muonic atoms by photonic interaction

Yuichi Uesaka, Yoshitaka Kuno, Joe Sato +2

Studies of the charged lepton flavor violating process of $μ^{-} e^{-} \to e^{-} e^{-}$ in muonic atoms by the four Fermi interaction [Y. Uesaka \textit{et al}., Phys. Rev. D {\bf 93}, 076006…

hep-ph2017★ 16 cited

Higgs mediated CLFV processes $μ N (e N) \to τ X$ via gluon operators

Michihisa Takeuchi, Yuichi Uesaka, Masato Yamanaka

We revisit charged lepton flavor violating (CLFV) scattering processes $ℓ_{i} N \to τ X (ℓ_{i} ∋ e, μ)$ mediated by Higgs. We point out that a new subprocess $\ell_{i} g…

hep-ph2016★ 13 cited

Improved analyses for $μ^{-} e^{-} \to e^{-} e^{-}$ in muonic atoms by contact interactions

Yuichi Uesaka, Yoshitaka Kuno, Joe Sato +2

The charged lepton flavor violating (CLFV) processes of $μ^{-} e^{-} \to e^{-} e^{-}$ decay by four Fermi contact interactions in a muonic atom for various atoms are investigated. The…

hep-ph2015

Improved analysis of the CLFV decay of muonic atoms $μ^{-} e^{-} \to e^{-} e^{-}$

Yuichi Uesaka, Yoshitaka Kuno, Joe Sato +2

Koike et al. proposed the charged lepton flavor violation (CLFV) decay of the muonic atom $μ^{-} e^{-} \to e^{-} e^{-}$ as one of the promising processes to search for new physics bey…

Lepton number and flavor violation mediated by doubly charged scalars at μTRISTAN μ+μ+ collider

Comprehensive table of calculated Huff factors

Probing Scalar-Mediator Quark Couplings via CLFV Lepton-Nucleon Scattering

μ−→e−γ in a muonic atom as a probe for effective lepton flavor violating operators involving photon fields

Insights from the magnetic field dependence of the muonium-to-antimuonium transition

Electron wave functions in beta-decay formulas revisited (II): Completion including recoil-order and induced currents

Neutrinoless double beta decay and the muonium-to-antimuonium transition in models with a doubly charged scalar

Determination of coupling patterns by parallel searches for μ−→e+ and μ−→e− in muonic atoms

Isotope dependence of muon-to-electron conversion

Transverse positron polarization in the polarized μ+ decay related with the muonium-to-antimuonium transition

Isotope dependence of muon decay in orbit

Models of the Muonium to Antimuonium Transition

Charged lepton flavor violation associated with heavy quark production in deep inelastic lepton-nucleon scattering via scalar exchange

Beta-decay formulas revisited (I): Gamow--Teller and spin-dipole contributions to allowed and first-forbidden transitions

Kinematical distributions of coherent neutrino trident production in gauged Lμ​−Lτ​ model

A two-loop induced neutrino mass model, dark matter, and LFV processes ℓi​→ℓj​γ, and μe→ee in a hidden local U(1) symmetry

Probing μeγγ contact interactions with μ→e conversion

Model identification in μ−→e− conversion with invisible boson emission using muonic atoms

A radiatively induced neutrino mass model with hidden local U(1) and LFV processes ℓi​→ℓj​γ, μ→eZ′ and μe→ee

Momentum distribution of the electron pair from the charged lepton flavor violating process μ−e−→e−e− in muonic atoms with a polarized muon

Improved analysis for μ−e−→e−e− in muonic atoms by photonic interaction

Higgs mediated CLFV processes μN(eN)→τX via gluon operators

Improved analyses for μ−e−→e−e− in muonic atoms by contact interactions

Improved analysis of the CLFV decay of muonic atoms μ−e−→e−e−

Lepton number and flavor violation mediated by doubly charged scalars at $μ$ TRISTAN $μ^{+} μ^{+}$ collider

$μ^{-} \to e^{-} γ$ in a muonic atom as a probe for effective lepton flavor violating operators involving photon fields

Determination of coupling patterns by parallel searches for $μ^{-} \to e^{+}$ and $μ^{-} \to e^{-}$ in muonic atoms

Transverse positron polarization in the polarized $μ^{+}$ decay related with the muonium-to-antimuonium transition

Kinematical distributions of coherent neutrino trident production in gauged $L_{μ} - L_{τ}$ model

A two-loop induced neutrino mass model, dark matter, and LFV processes $ℓ_{i} \to ℓ_{j} γ$ , and $μ e \to ee$ in a hidden local $U (1)$ symmetry

Probing $μ e γ γ$ contact interactions with $μ \to e$ conversion

Model identification in $μ^{-} \to e^{-}$ conversion with invisible boson emission using muonic atoms

A radiatively induced neutrino mass model with hidden local $U (1)$ and LFV processes $ℓ_{i} \to ℓ_{j} γ$ , $μ \to e Z^{'}$ and $μ e \to ee$

Momentum distribution of the electron pair from the charged lepton flavor violating process $μ^{-} e^{-} \to e^{-} e^{-}$ in muonic atoms with a polarized muon

Improved analysis for $μ^{-} e^{-} \to e^{-} e^{-}$ in muonic atoms by photonic interaction

Higgs mediated CLFV processes $μ N (e N) \to τ X$ via gluon operators

Improved analyses for $μ^{-} e^{-} \to e^{-} e^{-}$ in muonic atoms by contact interactions

Improved analysis of the CLFV decay of muonic atoms $μ^{-} e^{-} \to e^{-} e^{-}$