Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-05-14
Nucl.Phys.B828:289-316,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX 38 pages, 28 PS figures. Added cross section plots, comments and references. Final version to appear in NPB
Scientific paper
10.1016/j.nuclphysb.2009.11.021
If new leptons exist close to the electroweak scale, they can be produced in pairs at LHC through standard or new interactions. We study the production of heavy lepton pairs in SM extensions with: (i) a Majorana or Dirac lepton triplet, as those appearing in type-III seesaw; (ii) a lepton isodoublet (N,E)_{L,R}; (iii) a charged isosinglet E_{L,R}; (iv) a Majorana or Dirac neutrino singlet N and an additional Z' gauge boson. It is shown that the trilepton final state l+-l+-l-+, which has a small SM background, constitutes the golden channel for heavy neutrino searches, being very sensitive to Majorana or Dirac neutrinos in triplet, doublet or singlet SU(2)_L representations. For higher luminosities, signals in this final state can also distinguish lepton triplets from doublets and singlets. The Majorana or Dirac nature of the heavy neutrinos is revealed by the presence or not of like-sign dilepton l+-l+- signals without significant missing energy. Notably, l+-l+- signals but with large missing energy are characteristic of Dirac triplets, distinguishing them from the other two models with a heavy Dirac neutrino. Further discrimination is achieved with the analysis of the clean l+l+l-l- final state.
No associations
LandOfFree
Heavy lepton pair production at LHC: model discrimination with multi-lepton signals does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Heavy lepton pair production at LHC: model discrimination with multi-lepton signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heavy lepton pair production at LHC: model discrimination with multi-lepton signals will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-399662