Probing the Weinberg operator at colliders

Benjamin Fuks, Jonas Neundorf, Krisztian Peters, Richard Ruiz, Matthias Saimpert
2021 Physical Review D  
Motivated by searches for 0νββ decay in nuclear experiments and collider probes of lepton number violation at dimension d ≥ 7, we investigate the sensitivity to the d = 5 Weinberg operator using the non-resonant signature pp → ± ± jj at the LHC. We develop a prescription for the operator that is applicable in collisions and decays, and focus on the = µµ channel, which is beyond the reach of nuclear decays. For a Wilson coefficient C µµ 5 = 1, scales as heavy as Λ ∼ 8.3 (13) TeV can be probed
more » ... h L = 300 fb −1 (3 ab −1 ). This translates to effective µµ Majorana masses of |mµµ| ∼ 7.3 (5.4) GeV, and establishes a road map for testing the Weinberg operator at accelerators.
doi:10.1103/physrevd.103.115014 fatcat:mjjetyhf4ve2he53fswamwj5aa