SCOAP3 Repository 19 records found  1 - 10nextSearch took 0.02 seconds. 
1. Neutrino Masses from Planck-Scale Lepton Number Breaking / Ibarra, Alejandro ; Strobl, Patrick ; Toma, Takashi
We consider an extension of the standard model by right-handed neutrinos and we argue that, under plausible assumptions, a neutrino mass of O(0.1) eV is naturally generated by the breaking of the lepton number at the Planck scale, possibly by gravitational effects, without the necessity of introducing new mass scales in the model. [...]
Published in Physical Review Letters 122 (2019) 10.1103/PhysRevLett.122.081803 arXiv:1802.09997
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2. Probing pseudo Nambu-Goldstone boson dark matter at loop level / Ishiwata, Koji ; Toma, Takashi
In the standard model extended by a single complex scalar boson with a softly broken global U(1) symmetry, a pseudo Nambu-Goldstone boson becomes a candidate for dark matter. [...]
Published in JHEP 1812 (2018) 089 10.1007/JHEP12(2018)089 arXiv:1810.08139
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3. Electric dipole moments in the minimal scotogenic model / Abada, Asmaa ; Toma, Takashi
In this work we consider a minimal version of the scotogenic model capable of accounting for an electron electric dipole moment within experimental sensitivity reach in addition to providing a dark matter candidate and radiatively generating neutrino masses. [...]
Published in JHEP 1804 (2018) 030 10.1007/JHEP04(2018)030 arXiv:1802.00007
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4. Effective Majorana mass matrix from tau and pseudoscalar meson lepton number violating decays / Abada, Asmaa ; Romeri, Valentina ; Lucente, Michele ; Teixeira, Ana ; et al
An observation of any lepton number violating process will undoubtedly point towards the existence of new physics and indirectly to the clear Majorana nature of the exchanged fermion. [...]
Published in JHEP 1802 (2018) 169 10.1007/JHEP02(2018)169 arXiv:1712.03984
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5. A radiative neutrino mass model with SIMP dark matter / Ho, Shu-Yu ; Toma, Takashi ; Tsumura, Koji
We propose the first viable radiative seesaw model, in which the neutrino masses are induced radiatively via the two-loop Feynman diagram involving Strongly Interacting Massive Particles (SIMP). [...]
Published in JHEP 1707 (2017) 101 10.1007/JHEP07(2017)101 arXiv:1705.00592
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6. Evading direct dark matter detection in Higgs portal models / Arcadi, Giorgio ; Gross, Christian ; Lebedev, Oleg ; Pokorski, Stefan ; et al
Many models of Higgs portal Dark Matter (DM) find themselves under pressure from increasingly tight direct detection constraints. [...]
Published in Physics letters B (2017) 10.1016/j.physletb.2017.03.044
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7. Multicomponent Dark Matter from gauge symmetry / Arcadi, Giorgio ; Gross, Christian ; Lebedev, Oleg ; Mambrini, Yann ; et al
The composition of Dark Matter (DM) remains an important open question. [...]
Published in JHEP 1612 (2016) 081 10.1007/JHEP12(2016)081 arXiv:1611.00365
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8. Electron electric dipole moment in Inverse Seesaw models / Abada, Asmaa ; Toma, Takashi
We consider the contribution of sterile neutrinos to the electric dipole moment of charged leptons in the most minimal realisation of the Inverse Seesaw mechanism, in which the Standard Model is extended by two right-handed neutrinos and two sterile fermion states. [...]
Published in JHEP 1608 (2016) 079 10.1007/JHEP08(2016)079 arXiv:1605.07643
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9. Electric dipole moments of charged leptons with sterile fermions / Abada, Asmaa ; Toma, Takashi
We address the impact of sterile fermions on charged lepton electric dipole moments. [...]
Published in JHEP 1602 (2016) 174 10.1007/JHEP02(2016)174 arXiv:1511.03265
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10. X-ray lines and self-interacting dark matter / Mambrini, Yann ; Toma, Takashi
We study the correlation between a monochromatic signal from annihilating dark matter and its self-interacting cross section. [...]
Published in EPJC 75 (2015) 570 10.1140/epjc/s10052-015-3788-8
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