2016/12/31 by P. S. Bhupal Dev, Rabindra N. Mohapatra, Yongchao Zhang · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Geometry #Large Hadron Collider #Lepton #Missing energy #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Physics beyond the Standard Model #Quantum mechanics #Scalar (mathematics) #Seesaw mechanism #Seesaw molecular geometry #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.95.115001
published as Phys. Rev. D 95, 115001 (2017) · 9 pages, 3 figures, 2 tables, minor changes, version to appear in PRD
openalex created_date 2017/01/13 · arxiv created 2017/05/31 · openalex publication_date 2017/06/02 · arxiv updated 2017/06/06 · openalex updated_date 2026/08/06
We point out that in the minimal left-right realization of TeV scale seesaw for neutrino masses, the neutral scalar from the right-handed SU(2)R breaking sector could be much lighter than the right-handed scale. We discuss for the first time the constraints on this particle from low-energy flavor observables and find that the light scalar is necessarily long-lived. We show that it can be searched for at the LHC via displaced signals of a collimated photon jet and can also be tested in current and future high-intensity experiments. In contrast to the unique diphoton signal (and associated jets) in the left-right case, a generic beyond-standard-model light scalar decays mostly to leptons or jets. Thus, the diphoton channel proposed here provides a new avenue to test the left-right framework and reveal the underlying neutrino mass generation mechanism.