231 citations · 2.6k across the 73 of their papers we have counts for
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Boosted dark matter from semi-annihilations in the galactic center
Boris Betancourt Kamenetskaia, Motoko Fujiwara, Alejandro Ibarra +1
In some scenarios, the dark matter relic abundance is set by the semi-annihilation of two dark matter particles into one dark matter particle and one Standard Model particle. These…
Phenomenology of a scotogenic neutrino mass model at 3-loops
Asmaa Abada, Nicolás Bernal, Antonio E. Cárcamo Hernández +3
By extending the minimal scotogenic model with a spontaneously broken global symmetry and a preserved symmetry, we build a seesaw model for generating neutri…
Simultaneous detection of boosted dark matter and neutrinos from the semi-annihilation at DUNE
Mayumi Aoki, Takashi Toma
Dark matter direct detection experiments impose the strong bounds on thermal dark matter scenarios. The bound can naturally be evaded if the cross section is momentum transfer or v…
Phantom fluid cosmology: Impact of a phantom hidden sector on cosmological observables
James M. Cline, Matteo Puel, Takashi Toma +1
Phantom scalar theories are widely considered in cosmology, but rarely at the quantum level, where they give rise to negative-energy ghost particles. These cause decay of the vacuu…
Boosted dark matter from a phantom fluid
James M. Cline, Matteo Puel, Takashi Toma
It is known that theories of phantom dark energy, considered as quantum fields, predict a continuous production of positive- plus negative-energy particles, from spontaneous decay…
Sterile neutrino dark matter: relativistic freeze-out
Oleg Lebedev, Takashi Toma
Long-lived sterile neutrinos can play the role of dark matter. We consider the possibility that such neutrinos form a thermal bath with a singlet scalar, while not being in thermal…
Phenomenological and cosmological implications of a scotogenic three-loop neutrino mass model
Asmaa Abada, Nicolás Bernal, Antonio E. Cárcamo Hernández +3
We propose a scotogenic model for generating neutrino masses through a three-loop seesaw. It is a minimally extended inert doublet model with a spontaneously broken global symmetry…
Impact of first-order phase transitions on dark matter production in the scotogenic model
Hiroto Shibuya, Takashi Toma
In this work, we investigate the effects of first-order phase transitions on the singlet fermionic dark matter in the scotogenic model. It is known that this dark matter candidate…
Semi-annihilating dark matter coupled with Majorons
Takumi Miyagi, Takashi Toma
The thermal production mechanism of dark matter is attractive and well-motivated by predictivity. A representative of this type of dark matter candidate is the canonical, weakly in…
Direct detection of pseudo-Nambu-Goldstone dark matter with light mediator
Yoshihiko Abe, Takashi Toma
It has been found that a pseudo-Nambu-Goldstone boson dark matter suppresses the amplitude for elastic scattering with nuclei in non-relativistic limit, and thus can naturally evad…
Distinctive signals of boosted dark matter from its semi-annihilation
Takashi Toma
Dark matter can be boosted by various mechanisms, which may produce characteristic signals that are different from those of canonical dark matter. We show that the semi-annihilatio…
Vanishing or non-vanishing rainbow? Reduction formulas of electric dipole moment
Motoko Fujiwara, Junji Hisano, Takashi Toma
In this paper, we derive a simplified formula of electric dipole moments (EDMs) of a fermion. In the Standard Model, it is well-known that non-trivial cancellations between some ra…
Pseudo-Nambu-Goldstone Dark Matter Model Inspired by Grand Unification
Yoshihiko Abe, Takashi Toma, Koji Tsumura +1
A pseudo-Nambu-Goldstone boson (pNGB) is an attractive candidate for dark matter (DM) due to the simple evasion of the current severe limits of DM direct detection experiments. One…
Electric dipole moments in the extended scotogenic models
Motoko Fujiwara, Junji Hisano, Chihiro Kanai +1
Electric dipole moments (EDMs) of charged leptons arise from a new source of CP violation in the lepton sector. In this paper, we calculate the EDMs of the charged leptons in the m…
Non-thermal Production of PNGB Dark Matter and Inflation
Yoshihiko Abe, Takashi Toma, Koichi Yoshioka
A pseudo Nambu-Goldstone boson (pNGB) is a natural candidate of dark matter in that it avoids the severe direct detection bounds. We show in this paper that the pNGB has another di…
Two-loop renormalization group equations for right-handed neutrino masses and phenomenological implications
Alejandro Ibarra, Patrick Strobl, Takashi Toma
We calculate the two-loop beta functions of the right-handed neutrino mass matrix in the Standard Model extended with right-handed neutrinos. We show that two-loop quantum effects…
Neutrino dark matter and the Higgs portal: improved freeze-in analysis
Valentina De Romeri, Dimitrios Karamitros, Oleg Lebedev +1
Sterile neutrinos are one of the leading dark matter candidates. Their masses may originate from a vacuum expectation value of a scalar field. If the sterile neutrino couplings are…
A little theory of everything, with heavy neutral leptons
James M. Cline, Matteo Puel, Takashi Toma
Recently a new model of "Affleck-Dine inflation" was presented, that produces the baryon asymmetry from a complex inflaton carrying baryon number, while being consistent with const…
Pseudo-Nambu-Goldstone dark matter from gauged symmetry
Yoshihiko Abe, Takashi Toma, Koji Tsumura
A pseudo-Nambu-Goldstone boson (pNGB) is an attractive candidate for dark matter since the current severe limits of dark matter direct detection experiments are naturally evaded by…
Affleck-Dine inflation
James M. Cline, Matteo Puel, Takashi Toma
The Affleck-Dine mechanism in its simplest form provides baryogenesis from the out-of-equilibrium evolution of a complex scalar field with a simple renormalizable potential. We sho…
Relativistic Freeze-in
Oleg Lebedev, Takashi Toma
We study production of scalar dark matter via the freeze--in mechanism in the relativistic regime, focussing on the simplest Higgs portal model. We derive the corresponding relativ…
Real Scalar Dark Matter: Relativistic Treatment
Giorgio Arcadi, Oleg Lebedev, Stefan Pokorski +1
A stable real scalar provides one of the simplest possibilities to account for dark matter. We consider the regime where its coupling to the Standard Model fields is negligibly sma…
Pseudo-Goldstone dark matter confronts cosmic ray and collider anomalies
James M. Cline, Takashi Toma
Persistent excesses in the spectra of gamma rays from the galactic center and cosmic ray antiprotons can be explained by dark matter of mass \,GeV annihilating into …
A --philic scalar doublet under flavor symmetry
Yoshihiko Abe, Takashi Toma, Koji Tsumura
We propose a minimal model which accommodates the long-standing anomaly of muon magnetic moment based on abelian discrete flavor symmetries. The standard model is extended by scala…