Zobrazeno 1 - 10
of 556
pro vyhledávání: '"SRIVASTAVA, Rahul"'
Coherent Elastic Neutrino-Nucleus (CE$\nu$NS) and Elastic Neutrino-Electron Scattering (E$\nu$ES) data are exploited to constrain "chiral" $U(1)_{X}$ gauged models with light vector mediator mass. These models fall under a distinct class of new symme
Externí odkaz:
http://arxiv.org/abs/2411.04197
Autor:
Prajapati, Hemant, Srivastava, Rahul
We introduce a new class of $U(1)_X$ symmetries where all Standard Model fermions are "chiral", i.e. the left and right-handed components have different charges under the $U(1)_X$ symmetry. Gauge anomaly cancellation is achieved by introducing three
Externí odkaz:
http://arxiv.org/abs/2411.02512
The Dirac Scotogenic model provides an elegant mechanism for generating small Dirac neutrino masses at the one loop level. A single abelian discrete $Z_{6}$ symmetry, simultaneously protects the ``Diracness'' of the neutrinos and the stability of the
Externí odkaz:
http://arxiv.org/abs/2409.18513
Publikováno v:
JHEP12(2024)036
We introduce a framework for hybrid neutrino mass generation, wherein scotogenic dark sector particles, including dark matter, are charged non-trivially under the $A_4$ flavor symmetry. The spontaneous breaking of the $A_4$ group to residual $\mathca
Externí odkaz:
http://arxiv.org/abs/2406.00188
The relativistic degrees of freedom ($N_{\rm eff}$) is one of the crucial cosmological parameters. The precise measurement of $N_{\rm eff}$ at the time of cosmic microwave background formation, by Planck 2018 can be used to understand the new fundame
Externí odkaz:
http://arxiv.org/abs/2404.10077
The current upper limit on $N_{\rm eff}$ at the time of CMB by Planck 2018 can place stringent constraints in the parameter space of BSM paradigms where their additional interactions may affect neutrino decoupling. Motivated by this fact in this pape
Externí odkaz:
http://arxiv.org/abs/2312.16304
Publikováno v:
Phys. Lett. B 853 (2024) 138635
This paper's novelty lies in introducing a hybrid scoto-seesaw model rooted in $A_4$ discrete modular symmetry leading to several interesting phenomenological implications. The scoto-seesaw framework leads to generation of one mass square difference
Externí odkaz:
http://arxiv.org/abs/2310.02363
Publikováno v:
JCAP 03 (2024) 028
We consider a scenario in which dark matter particles are accelerated to semi-relativistic velocities through their scattering with the Diffuse Supernova Neutrino Background. Such a subdominant, but more energetic dark matter component can be then de
Externí odkaz:
http://arxiv.org/abs/2309.04117
Modular symmetries offer a dynamic approach to understanding the flavour structure of leptonic mixing. Using the modular $\mathcal{A}_4$ flavour symmetry integrated in a type-II seesaw, we propose a simple and minimalistic model that restricts the ne
Externí odkaz:
http://arxiv.org/abs/2308.08981
The linear seesaw mechanism provides a simple way to generate neutrino masses. In addition to Standard Model particles, it includes quasi-Dirac leptons as neutrino mass mediators, and a leptophilic scalar doublet seeding small neutrino masses. Here w
Externí odkaz:
http://arxiv.org/abs/2305.00994