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Long-lived light scalars at the LHC

par Dev Bhupal, P.S.B.;Mohapatra, Rabindra Nath;Zhang, Yongchao
Référence Acta Physica Polonica. B, 48, 6, page (969-980)
Publication Publié, 2017-06

Article révisé par les pairs

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Résumé :

In the minimal left-right realization of TeV scale seesaw for neutrino masses, there is a phenomenologically allowed range of parameters where one of the neutral scalar particles from the right-handed symmetry breaking sector could have a mass at the GeV scale. We discuss the constraints on this particle from low-energy flavor observables, and find that such a light particle is necessarily long-lived, and can be searched for at the LHC via displaced signals of a collimated photon jet. This decay mode provides a new test of TeV scale left-right seesaw model since this is in sharp contrast with any generic beyond the Standard Model light scalar, which would decay to leptons and jets as well.