Effective field theory approach to lepton number violating decays $K^{\pm }\to {\pi }^{\mp }{l}_{\alpha }^{\pm }{l}_{\beta }^{\pm }$: long-distance contribution

Yi Liao, Xiao-Dong Ma, Hao-Lin Wang

This is a sequel to our recent work [1] in which we calculated the lepton number violating (LNV) $K^{\pm }$ decays due to contact dimension-9 (dim-9) quark-lepton effective interactio…