PT Journal
AU del Aguila, F
   Chala, M
   Santamaria, A
   Wudka, J
TI Discriminating between lepton number violating scalars using events with four and three charged leptons at the LHC
SO Physics Letters B
JI Phys. Lett. B
PY 2013
BP 310
EP 315
VL 725
IS 4-5
DI 10.1016/j.physletb.2013.07.014
LA English
AB Many Standard Model extensions predict doubly-charged scalars; in particular, all models with resonances in charged lepton-pair channels with non-vanishing lepton number; if these are pair produced at the LHC, the observation of their decay into l(-/+)l(-/+)W(-/+)W(-/+) will be necessary in order to establish their lepton-number violating character, which is generally not straightforward. Nonetheless, the analysis of events containing four charged leptons (including scalar decays into one or two taus as well as into W bosons) makes it possible to determine whether the doubly-charged excitation belongs to a multiplet with weak isospin T = 0,1/2,1,3/2 or 2 (assuming there are no excitations with charge > 2); though discriminating between the isosinglet and isodoublet cases is possible only if charged-current events cannot produce the doubly-charged isosinglet.
ER