Abstract
The current experimental data does not exclude the possibility that additional sterile neutrinos exist. We discuss two methods to determine active-sterile neutrino mixing. Firstly, singular values provide a comprehensive description of the mixing phenomena. By using them, we get the stringent bounds for the active-sterile mixing in the scenario with one additional neutrino. Secondly, we describe a simplified model with a sterile neutrino to show a sensitivity of the invisible Z-boson decay to the sterile neutrino mixings. In the end, we outline the precise analysis of the light-heavy mixings coming from the Z-boson decay taking into account the first-order radiative corrections.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
