SCOAP3 Repository 15 records found  1 - 10nextSearch took 0.08 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. Potential for probing three-body decays of Long-Lived Particles with MATHUSLA / Ibarra, Alejandro ; Molinaro, Emiliano ; Vogl, Stefan
Several extensions of the Standard Model predict the existence of Long-Lived Neutral Particles (LLNPs) with masses in the multi-GeV range and decay lengths of O(100m) or longer. [...]
Published in Physics letters B 789 (2019) 127-131 10.1016/j.physletb.2018.12.015
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3. Clockwork for neutrino masses and lepton flavor violation / Ibarra, Alejandro ; Kushwaha, Ashwani ; Vempati, Sudhir K.
We investigate the generation of small neutrino masses in a clockwork framework which includes Dirac mass terms as well as Majorana mass terms for the new fermions. [...]
Published in Physics letters B (2018) 10.1016/j.physletb.2018.02.047
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4. Probing the scotogenic FIMP at the LHC / Hessler, Andre ; Ibarra, Alejandro ; Molinaro, Emiliano ; Vogl, Stefan
We analyse the signatures at the Large Hadron Collider (LHC) of the scotogenic model, when the lightest Z 2 -odd particle is a singlet fermion and a feebly interacting massive particle (FIMP). [...]
Published in JHEP 1701 (2017) 100 10.1007/JHEP01(2017)100 arXiv:1611.09540
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5. DAMA confronts null searches in the effective theory of dark matter-nucleon interactions / Catena, Riccardo ; Ibarra, Alejandro ; Wild, Sebastian
We examine the dark matter interpretation of the modulation signal reported by the DAMA experiment from the perspective of effective field theories displaying Galilean invariance. [...]
Published in JCAP 1605 (2016) 039 10.1088/1475-7516/2016/05/039 arXiv:1602.04074
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6. Probing the inert doublet dark matter model with Cherenkov telescopes / Garcia-Cely, Camilo ; Gustafsson, Michael ; Ibarra, Alejandro
We present a detailed study of the annihilation signals of the inert dark matter doublet model in its high mass regime. [...]
Published in JCAP 1602 (2016) 043 10.1088/1475-7516/2016/02/043 arXiv:1512.02801
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7. Signatures from scalar dark matter with a vector-like quark mediator / Giacchino, Federica ; Ibarra, Alejandro ; Honorez, Laura Lopez ; Tytgat, Michel H.G. ; et al
We present a comprehensive study of a model where the dark matter is composed of a singlet real scalar that couples to the Standard Model predominantly via a Yukawa interaction with a light quark and a colored vector-like fermion. [...]
Published in JCAP 1602 (2016) 002 10.1088/1475-7516/2016/02/002 arXiv:1511.04452
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8. Gamma-rays from Heavy Minimal Dark Matter / Garcia-Cely, Camilo ; Ibarra, Alejandro ; Lamperstorfer, Anna S. ; Tytgat, Michel H.G.
Motivated by the Minimal Dark Matter scenario, we consider the annihilation into gamma rays of candidates in the fermionic 5-plet and scalar 7-plet representations of SU(2)L, taking into account both the Sommerfeld effect and the internal bremsstrahlung. [...]
Published in JCAP 1510 (2015) 058 10.1088/1475-7516/2015/10/058 arXiv:1507.05536
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9. A novel approach to derive halo-independent limits on dark matter properties / Ferrer, Francesc ; Ibarra, Alejandro ; Wild, Sebastian
We propose a method that allows to place an upper limit on the dark matter elastic scattering cross section with nucleons which is independent of the velocity distribution. [...]
Published in JCAP 1509 (2015) 052 10.1088/1475-7516/2015/09/052 arXiv:1506.03386
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10. Dirac dark matter with a charged mediator: a comprehensive one-loop analysis of the direct detection phenomenology / Ibarra, Alejandro ; Wild, Sebastian
We analyze the direct detection signals of a toy model consisting of a Dirac dark matter particle which couples to one Standard Model fermion via a scalar mediator. [...]
Published in JCAP 1505 (2015) 047 10.1088/1475-7516/2015/05/047 arXiv:1503.03382
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1 Ibarra, A.
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