Can LHC Test the See-Saw Mechanism?⋆
نویسنده
چکیده
We discuss the prospects for detecting right-handed neutrinos which are introduced in the see-saw mechanism at future colliders. This requires a very accurate cancellation between contributions from different right-handed neutrinos to the light neutrino mass matrix. We search for possible symmetries behind this cancellation and find that they have to include lepton number conservation. Light neutrino masses can be generated as a result of small symmetry-breaking perturbations. The impact of these perturbations on LHC physics is negligible, so that the mechanism of neutrino mass generation and LHC physics are decoupled in general. In constrained cases, accelerator observables and neutrino masses and mixings can be correlated. PACS. 14.60.Pq Neutrino mass and mixing – 14.60.St Non-standard-model neutrinos, righthanded neutrinos, etc.
منابع مشابه
Leptogenesis and Lhc Physics with Type Iii See-saw
Abstract: The See-Saw mechanism provides a nice way to explain why neutrino masses are so much lighter than their charged lepton partners. It also provides a nice way to explain baryon asymmetry in our universe via the leptogenesis mechanism. In this talk we review leptogenesis and LHC physics in a See-Saw model proposed in 1989, now termed the Type III See-Saw model. In this model, SU(2)L trip...
متن کاملLeptogenesis and LHC Physics with Type III See - Saw a
Abstract: The See-Saw mechanism provides a nice way to explain why neutrino masses are so much lighter than their charged lepton partners. It also provides a nice way to explain baryon asymmetry in our universe via the leptogenesis mechanism. In this talk we review leptogenesis and LHC physics in a See-Saw model proposed in 1989, now termed the Type III See-Saw model. In this model, SU(2)L trip...
متن کاملUg-ft-231/08, Cafpe-101/08 Electroweak Constraints on See-saw Messengers and Their Implications for Lhc
We review the present electroweak precision data constraints on the mediators of the three types of see-saw mechanisms. Except in the see-saw mechanism of type I, with the heavy neutrino singlets being mainly produced through their mixing with the Standard Model leptons, LHC will be able to discover or put limits on new scalar (see-saw of type II) and lepton (see-saw of type III) triplets near ...
متن کاملType-III see-saw at LHC
Neutrino masses can be generated by fermion triplets with TeV-scale mass, that would manifest at LHC as production of two leptons together with two heavy SM vectors or higgs, giving rise to final states such as 2`+ 4j (that can violate lepton number and/or lepton flavor) or ` + 4j + / ET . We devise cuts to suppress the SM backgrounds to these signatures. Furthermore, for most of the mass range...
متن کاملLepton Flavour Violating Heavy Higgs Decays Within the νMSSM and Their Detection at the LHC
Within the νMSSM, a Minimal Supersymmetric neutrino See-saw Model, Lepton Flavour Violating Higgs couplings are strongly enhanced at large tanβ ( ∼ 30), which can lead to BR(H0/A0 → τμ) ≃ O(10−4), for MH0/A0 ∼ 160 GeV. Enhancements on the production of Higgs bosons, through the gluon fusion mechanism, gg → H0/A0, and the associated production channel gg, qq → bbH0/A0, whose rates grow with tanβ...
متن کامل