Zobrazeno 1 - 10
of 3 224
pro vyhledávání: '"P, Drewes"'
We search for an excess of electrons and positrons in the interplanetary space from the decays of heavy neutrinos produced in nuclear reactions in the Sun. Using measurements of the electron spectra in the MeV range from the Ulysses and SOHO satellit
Externí odkaz:
http://arxiv.org/abs/2412.14752
We consider an extension of the Standard Model with three right-handed neutrinos, endowed with a flavour symmetry $G_f$, $G_f=\Delta (3 \, n^2)$ or $G_f=\Delta (6 \, n^2)$, $n \geq 2$, and CP. For large active-sterile mixing, we study the properties
Externí odkaz:
http://arxiv.org/abs/2412.10254
We present in this work the first assessment of the previously unexplored effect of positronium formation on the value of the effective number of neutrino species in the Standard Model, $N_{\mathrm{eff}}^{\mathrm{SM}}$. We find that the expected impa
Externí odkaz:
http://arxiv.org/abs/2411.14091
If any heavy neutral leptons are discovered in accelerator-based experiments, key questions will involve their possible connection to neutrino masses or leptogenesis. Working in a renormalisable extension of the Standard Model by three right-handed n
Externí odkaz:
http://arxiv.org/abs/2407.13620
We revisit the impact of heavy neutrinos with masses in the MeV-GeV range on neutrinoless double beta decay ($0\nu\beta\beta$) in view of updated results for the lifetime of this process. Working in a minimal realistic extension of the Standard Model
Externí odkaz:
http://arxiv.org/abs/2407.10560
Photosynthetic microbes have evolved and successfully adapted to the ever-changing environmental conditions in complex microhabitats throughout almost all ecosystems on Earth. In the absence of light, they can sustain their biological functionalities
Externí odkaz:
http://arxiv.org/abs/2407.09884
Engelfriet and Vereijken have shown that linear graph grammars based on hyperedge replacement generate graph languages that can be considered as interpretations of regular string languages over typed symbols. In this paper we show that finite automat
Externí odkaz:
http://arxiv.org/abs/2404.15052
Autor:
van Remortel, N., Molla, M. Colomer, Clerbeaux, B., De Roeck, A., Drewes, M., Keloth, R., Sfar, H., Vercaemer, S., Verstraeten, M.
Heavy neutrinos with masses in the MeV range can in principle simultaneously explain the light neutrino masses and the origin of baryonic matter in the universe. The strongest constraints on their properties come from their potential impact on the fo
Externí odkaz:
http://arxiv.org/abs/2403.04662
Publikováno v:
JCAP 06 (2024) 032
We compute the dominant QED correction to the neutrino-electron interaction rate in the vicinity of neutrino decoupling in the early universe, and estimate its impact on the effective number of neutrino species $N_{\rm eff}$ in cosmic microwave backg
Externí odkaz:
http://arxiv.org/abs/2402.18481
Publikováno v:
JCAP06(2024)073
Hot viscous plasmas unavoidably emit a gravitational wave background, similar to electromagnetic black body radiation. We study the contribution from hidden particles to the diffuse background emitted by the primordial plasma in the early universe. W
Externí odkaz:
http://arxiv.org/abs/2312.13855