Search for Heavy Right Handed Neutrinos at the FCC-ee

By A. Blondel, E. Graverini, N. Serra, M. Shaposhnikov. 2014

186 citations recorded by the source corpus.

The Standard Model of particle physics is still lacking an understanding of the generation and nature of neutrino masses. A favorite theoretical scenario (the see-saw mechanism) is that both Dirac and Majorana mass terms are present, leading to the existence of heavy partners of the light neutrinos, presumably massive and nearly sterile. These heavy neutrinos can be searched for at high energy lepton colliders of very high luminosity, such as the Future electron-positron e+e− Circular Collider, FCC-ee (TLEP), presently studied within the Future Circular Collider design study at CERN, as a possible first step. A first look at sensitivities, both from neutrino counting and from direct search for heavy neutrino decay, are presented. The number of neutrinos Nν should be measurable with a precision of ΔNν≈±(0.0004–0.0010), while the direct search appears very promising due to the long lifetime of heavy neutrinos for small mixing angles. A sensitivity down to a heavy-light mixing of |U|2≃10−12 is obtained, covering a large phase space for heavy neutrino masses between 10 and 80 GeV/c2.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e0dd3c0941eb872a0dc282c5eb50c48f3552b3e9

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In Nuclear and High Energy Physics

Citations in the corpus

A Call for New Physics : The Muon Anomalous Magnetic Moment and Lepton Flavor Violation (2016, methodology): “neutral current. Therefore it is applicable only to RH neutrino masses below the Zmass [506]. A huge improvement is expected in this direction with the planned FCC-ee experiment as shown in the gures [507, 508]. 5.12. Type II Seesaw Type II seesaw mechanism refers to a framework where the active neu”
Sterile neutrino Dark Matter (2018, background): “tic approach that addresses the beyond-the-Standard-Model problems in a bottomup fashion, not introducing particle heavier than the Higgs boson and attempting to be 17 complete [112,145] and testable [115,130,132,146{148]. In this approach the three righthanded neutrinos are responsible for neutrino”
Lepton Number Violation: Seesaw Models and Their Collider Tests (2017, background): “It is unclear if deviations from NSM ν are the result of experimental uncertainty or indicate the presence of, for example, RH neutrinos [224, 239].”
Phenomenology of GeV-scale heavy neutral leptons (2018, unknown): “The sensitivity estimates from prospective experiments are based on [27] (FCC-ee), [9] (NA62), [60] (SHiP) and [61] (MATHUSLA@LHC).”