Takaaki Nomura

activity

20062026

g - 2

R_{D^{(*)}}

, and

R_{K}

in a leptoquark model

131 citations · 3k across the 156 of their papers we have counts for

collaborators

Showing 2017Show all

25 papers · 1 filter

hep-ph2017★ 9 cited

Radiative seesaw models linking to dark matter candidates inspired by the DAMPE excess

Takaaki Nomura, Hiroshi Okada

We propose two possibilities to explain an excess of electron/positron flux around 1.4 TeV recently reported by Dark Matter Explore (DAMPE) in the framework of radiative seesaw mod…

hep-ph2017★ 29 cited

Explaining the DAMPE $e^{+} e^{-}$ excess using the Higgs triplet model with a vector dark matter

Chuan-Hung Chen, Cheng-Wei Chiang, Takaaki Nomura

We explain the $e^{+} e^{-}$ excess observed by the DAMPE Collaboration using a dark matter model based upon the Higgs triplet model and an additional hidden $S U (2)_{X}$ gauge symmetry.…

hep-ph2017★ 12 cited

A radiative seesaw model with higher order terms under an alternative $U (1)_{B - L}$

Takaaki Nomura, Hiroshi Okada

We propose a model based on an alternative $U (1)_{B - L}$ gauge symmetry with 5 dimensional operators in the Lagrangian, and we construct the neutrino masses at one-loop level, and d…

hep-ph2017★ 7 cited

Left-handed and right-handed U(1) gauge symmetry

Takaaki Nomura, Hiroshi Okada

We propose a model with the left-handed and right-handed continuous Abelian gauge symmetry; $U (1)_{L} \times U (1)_{R}$ . Then three right-handed neutrinos are naturally required to achie…

hep-ph2017★ 18 cited

Hidden $U (1)$ gauge symmetry realizing a neutrinophilic two-Higgs-doublet model with dark matter

Takaaki Nomura, Hiroshi Okada

We propose a neutrinophilic two Higgs doublet model with hidden local $U (1)$ symmetry, where active neutrinos are Dirac type, and a fermionic DM candidate is naturally induced as a…

hep-ph2017★ 22 cited

Neutrinophilic two Higgs doublet model with dark matter under an alternative $U (1)_{B - L}$ gauge symmetry

Takaaki Nomura, Hiroshi Okada

We propose Dirac type active neutrino with rank two mass matrix and a Majorana fermion dark matter candidate with an alternative local $U (1)_{B - L}$ extension of neutrinophilic two…

hep-ph2017★ 19 cited

Neutrino mass with large $S U (2)_{L}$ multiplet fields

Takaaki Nomura, Hiroshi Okada

We propose an extension of the standard model introducing large $S U (2)_{L}$ multiplet fields which are quartet and septet scalars and quintet Majorana fermions. These multiplets can…

hep-ph2017★ 5 cited

Light flavon signals at electron - photon colliders

Yu Muramatsu, Takaaki Nomura, Yusuke Shimizu +1

Flavor symmetries are useful to realize fermion flavor structures in the standard model. In particular, discrete $A_{4}$ symmetry is used to realize lepton flavor structures, and som…

hep-ph2017★ 3 cited

Neutrino mass in flavor dependent gauged lepton model

Takaaki Nomura, Hiroshi Okada

We study a neutrino model introducing an additional nontrivial gauged lepton symmetry where the neutrino masses are induced at two-loop level while the first and second charged-lep…

hep-ph2017★ 85 cited

Penguin $b \to s ℓ^{' +} ℓ^{' -}$ and $B$ -meson anomalies in a gauged $L_{μ} - L_{τ}$

Chuan-Hung Chen, Takaaki Nomura

The $Z^{'}$ -gauge boson in an $U (1)_{L_{μ} - L_{τ}}$ gauge symmetry has two interesting features: one is its vector couplings to the charged leptons, and the other is the decoupling from th…

hep-ph2017★ 18 cited

Minimal realization of right-handed gauge symmetry

Takaaki Nomura, Hiroshi Okada

We propose a minimally extended gauge symmetry model with $U (1)_{R}$ , where only the right-handed fermions have nonzero charges in the fermion sector. To achieve both anomaly cancell…

hep-ph2017★ 1 cited

Gauged Lepton Symmetry Model

Takaaki Nomura, Hiroshi Okada

We study a model with $U (1)$ gauged lepton number symmetry in which the active neutrino masses are generated at two-loop level through the spontaneous breaking of the lepton number…

hep-ph2017★ 5 cited

A model with isospin doublet $U (1)_{D}$ gauge symmetry

Takaaki Nomura, Hiroshi Okada

We propose a model with an extra isospin doublet $U (1)_{D}$ gauge symmetry, in which we introduce several extra fermions with odd parity under a discrete $Z_{2}$ symmetry in order to c…

hep-ph2017★ 5 cited

Neutrino mass in a gauged $L_{μ} - L_{τ}$ model

Chuan-Hung Chen, Takaaki Nomura

We study the origin of neutrino mass through lepton-number violation and spontaneous $U (1)_{L_{μ} - L_{τ}}$ symmetry breaking. To accomplish the purpose, we include one Higgs triplet, tw…

hep-ph2017★ 11 cited

Radiative neutrino mass in an alternative $U (1)_{B - L}$ gauge symmetry

Takaaki Nomura, Hiroshi Okada

We propose a neutrino model in which neutrino masses are generated at one loop level and three right-handed fermions have non-trivial charges under $U (1)_{B - L}$ gauge symmetry in n…

hep-ph2017★ 14 cited

Loop induced type-II seesaw model and GeV dark matter with $U (1)_{B - L}$ gauge symmetry

Takaaki Nomura, Hiroshi Okada

We propose a model with $U (1)_{B - L}$ gauge symmetry and several new fermions in no conflict with anomaly cancellation where the neutrino masses are given by the vacuum expectation…

hep-ph2017★ 26 cited

$L_{μ} - L_{τ}$ gauge-boson production from lepton flavor violating $τ$ decays at Belle II

Chuan-Hung Chen, Takaaki Nomura

$L_{μ} - L_{τ}$ gauge boson ( $Z^{'}$ ) with a mass in the MeV to GeV region can resolve not only the muon $g - 2$ excess, but also the gap in the high-energy cosmic neutrino spectrum at IceCub…

hep-ph2017★ 20 cited

Loop suppressed light fermion masses with $U (1)_{R}$ gauge symmetry

Takaaki Nomura, Hiroshi Okada

We propose a model with two Higgs doublet where quark and charged-lepton masses in the first and second families are induced at one-loop level, and neutrino masses are induced at t…

hep-ph2017★ 69 cited

Generation of radiative neutrino mass in the linear seesaw framework, charged lepton flavor violation and dark matter

Arindam Das, Takaaki Nomura, Hiroshi Okada +1

We investigate a model with local U(1) $_{B - L}$ and discrete $Z_{2}$ symmetries where two types of weak isospin singlet neutrinos, vector-like charged lepton and exotic scalar fields…

hep-ph2017★ 131 cited

Excesses of muon $g - 2$ , $R_{D^{(*)}}$ , and $R_{K}$ in a leptoquark model

Chuan-Hung Chen, Takaaki Nomura, Hiroshi Okada

In this study, we investigate muon $g - 2$ , $R_{K^{(*)}}$ , and $R_{D^{(*)}}$ anomalies in a specific model with one doublet, one triplet, and one singlet scalar leptoquark (LQ). When…

hep-ph2017★ 25 cited

Radiatively Induced Neutrino Mass Model with Flavor Dependent Gauge Symmetry

SangJong Lee, Takaaki Nomura, Hiroshi Okada

We study a radiative seesaw model at one-loop level with a flavor dependent gauge symmetry $U (1)_{μ - τ}$ , in which we consider bosonic dark matter. We also analyze the constraints f…

hep-ph2017★ 30 cited

Discriminating leptonic Yukawa interactions with doubly charged scalar at the ILC

Takaaki Nomura, Hiroshi Okada, Hiroshi Yokoya

We explore discrimination of two types of leptonic Yukawa interactions associated with Higgs triplet, $L ˉ_{L}^{c} Δ L_{L}$ , and with $S U (2)$ singlet doubly charged scalar, $\bar e_R^c…

hep-ph2017★ 57 cited

Explaining $B \to K^{(*)} ℓ^{+} ℓ^{-}$ anomaly by radiatively induced coupling in $U (1)_{μ - τ}$ gauge symmetry

P. Ko, Takaaki Nomura, Hiroshi Okada

We propose an extension of the standard model (SM) with $U (1)_{μ - τ}$ gauge symmetry, extra vectorlike quark doublets $Q_{a}^{'}$ and singlet scalar $χ$ , both of which are charged under…

hep-ph2017★ 37 cited

A flavor dependent gauge symmetry, Predictive radiative seesaw and LHCb anomalies

P. Ko, Takaaki Nomura, Hiroshi Okada

We propose a predictive radiative seesaw model at one-loop level with a flavor dependent gauge symmetry $U (1)_{x B_{3} - x e - μ + τ}$ and Majorana fermion dark matter. For the neutrino mass…

Radiative seesaw models linking to dark matter candidates inspired by the DAMPE excess

Explaining the DAMPE e+e− excess using the Higgs triplet model with a vector dark matter

A radiative seesaw model with higher order terms under an alternative U(1)B−L​

Left-handed and right-handed U(1) gauge symmetry

Hidden U(1) gauge symmetry realizing a neutrinophilic two-Higgs-doublet model with dark matter

Neutrinophilic two Higgs doublet model with dark matter under an alternative U(1)B−L​ gauge symmetry

Neutrino mass with large SU(2)L​ multiplet fields

Light flavon signals at electron - photon colliders

Neutrino mass in flavor dependent gauged lepton model

Penguin b→sℓ′+ℓ′− and B-meson anomalies in a gauged Lμ​−Lτ​

Minimal realization of right-handed gauge symmetry

Gauged Lepton Symmetry Model

A model with isospin doublet U(1)D​ gauge symmetry

Neutrino mass in a gauged Lμ​−Lτ​ model

Radiative neutrino mass in an alternative U(1)B−L​ gauge symmetry

Loop induced type-II seesaw model and GeV dark matter with U(1)B−L​ gauge symmetry

Lμ​−Lτ​ gauge-boson production from lepton flavor violating τ decays at Belle II

Loop suppressed light fermion masses with U(1)R​ gauge symmetry

Generation of radiative neutrino mass in the linear seesaw framework, charged lepton flavor violation and dark matter

Excesses of muon g−2, RD(∗)​, and RK​ in a leptoquark model

Radiatively Induced Neutrino Mass Model with Flavor Dependent Gauge Symmetry

Discriminating leptonic Yukawa interactions with doubly charged scalar at the ILC

Explaining B→K(∗)ℓ+ℓ− anomaly by radiatively induced coupling in U(1)μ−τ​ gauge symmetry

A flavor dependent gauge symmetry, Predictive radiative seesaw and LHCb anomalies

Explaining the DAMPE $e^{+} e^{-}$ excess using the Higgs triplet model with a vector dark matter

A radiative seesaw model with higher order terms under an alternative $U (1)_{B - L}$

Hidden $U (1)$ gauge symmetry realizing a neutrinophilic two-Higgs-doublet model with dark matter

Neutrinophilic two Higgs doublet model with dark matter under an alternative $U (1)_{B - L}$ gauge symmetry

Neutrino mass with large $S U (2)_{L}$ multiplet fields

Penguin $b \to s ℓ^{' +} ℓ^{' -}$ and $B$ -meson anomalies in a gauged $L_{μ} - L_{τ}$

A model with isospin doublet $U (1)_{D}$ gauge symmetry

Neutrino mass in a gauged $L_{μ} - L_{τ}$ model

Radiative neutrino mass in an alternative $U (1)_{B - L}$ gauge symmetry

Loop induced type-II seesaw model and GeV dark matter with $U (1)_{B - L}$ gauge symmetry

$L_{μ} - L_{τ}$ gauge-boson production from lepton flavor violating $τ$ decays at Belle II

Loop suppressed light fermion masses with $U (1)_{R}$ gauge symmetry

Excesses of muon $g - 2$ , $R_{D^{(*)}}$ , and $R_{K}$ in a leptoquark model

Explaining $B \to K^{(*)} ℓ^{+} ℓ^{-}$ anomaly by radiatively induced coupling in $U (1)_{μ - τ}$ gauge symmetry