Zobrazeno 1 - 10
of 164
pro vyhledávání: '"Yaguna, Carlos E."'
Autor:
Yaguna, Carlos E., Zapata, Óscar
We propose a new and compact realization of singlet Dirac dark matter within the WIMP framework. Our model replaces the standard $Z_2$ stabilizing symmetry with a $Z_6$, and uses spontaneous symmetry breaking to generate the dark matter mass, resulti
Externí odkaz:
http://arxiv.org/abs/2401.13101
Autor:
Yaguna, Carlos E., Zapata, Óscar
We investigate a simple extension of the standard model (SM) in which the dark matter consists of a feebly interacting fermion (FIMP), charged under a new $Z_4$ symmetry, that is produced in the early Universe by the freeze-in mechanism. The only oth
Externí odkaz:
http://arxiv.org/abs/2308.05249
We investigate, for the first time, a scenario where the dark matter consists of three complex scalar fields that are stabilized by a single $Z_7$ symmetry. As an extension of the well-known scalar Higgs-portal, this $Z_7$ model is also subject to im
Externí odkaz:
http://arxiv.org/abs/2212.07488
Autor:
Yaguna, Carlos E., Zapata, Óscar
We revisit a two-component dark matter model in which the dark matter particles are a singlet fermion ($\psi$) and a singlet scalar ($S$), both stabilized by a single $Z_4$ symmetry. The model, which was proposed by Y. Cai and A. Spray, is remarkably
Externí odkaz:
http://arxiv.org/abs/2112.07020
Constraints on the indirect detection of dark matter are usually obtained from observations of astrophysical objects -- the Galactic Center, dwarf galaxies, M31, etc. Here we propose instead to look for the annihilation or decay of dark matter partic
Externí odkaz:
http://arxiv.org/abs/2107.05685
Autor:
Yaguna, Carlos E., Zapata, Óscar
In multi-component scalar dark matter scenarios, a single $Z_N$ ($N\geq 4$) symmetry may account for the stability of different dark matter particles. Here we study the case where $N$ is even ($N=2n$) and two species, a complex scalar and a real scal
Externí odkaz:
http://arxiv.org/abs/2106.11889
Discrete symmetries played a central role in elucidating the structure of the weak interactions, and they will probably be equally crucial regarding the interactions of the dark matter (DM) particle -- whose nature remains elusive. In this work we sh
Externí odkaz:
http://arxiv.org/abs/2007.01262
Autor:
Yaguna, Carlos E., Zapata, Óscar
The dark matter may consist not of one elementary particle but of different species, each of them contributing a fraction of the observed dark matter density. A major theoretical difficulty with this scenario --dubbed multi-component dark matter-- is
Externí odkaz:
http://arxiv.org/abs/1911.05515
Autor:
Yaguna, Carlos E.
Publikováno v:
JCAP04(2019)041
The first-year results from DEAP-3600, a single-phase liquid argon direct-detection dark matter experiment, were recently reported. At first sight, they seem to provide no new constraints, as the limit lies well within the region already excluded by
Externí odkaz:
http://arxiv.org/abs/1902.10256
Publikováno v:
Phys. Rev. D 99, 075008 (2019)
Neutrinos may be Dirac particles whose masses arise radiatively at one-loop, naturally explaining their small values. In this work we show that all the one-loop realizations of the dimension-five operator to effectively generate Dirac neutrino masses
Externí odkaz:
http://arxiv.org/abs/1812.05523