Testing the seesaw mechanisms via displaced right-handed neutrinos from a light scalar at the HL-LHC

Wei Liu, Jiale Li, Jing Li +1

We investigate the pair production of right-handed neutrinos from the decay of a light $B-L$ scalar in the $U(1{)}_{B-L}$ model. The $B-L$ scalar mixes to the SM Higgs, and the physi…