Abstract
The SU c (3) ⊗ SU L (2) ⊗ SU R (2) ⊗ U(1) left-right (LR) symmetric model explains the origin of the parity violation in weak interactions and predicts the existence of additional gauge bosons W R and Z′. In addition, heavy right-handed Majorana neutrino states N arise naturally within the LR symmetric model. The states N could be partners of light neutrino states, related to their nonzero masses through the seesaw mechanism. This makes the searches for W R , Z′, and N interesting and important. In the framework of the minimal LR model, we study the possibility to observe signals from N and W R production in pp collisions after three years of running at low LHC luminosity. We show that their decay signals can be identified with a small background, especially in the case of same-sign leptons in the final state. For the integral LHC luminosity of L t = 30 fb−1, the 5σ discovery of W R boson and heavy Majorana neutrinos N e with masses \(M_{W_R } \) up to 4 TeV and \(M_{N_e } \) up to 2.4 TeV, respectively, is found to be possible.
Highlights
Among several ext¢en¡¤s£¦io¥n§ s©o f t¢h¡¤e St¥ a#n©d ard¢¡¤M!8o¥d#e©l (SM¡&)¥(')th© at can be tested at LHC, see e.g. [1], the left-right (LR)symmetric model [2] is certainly one of the most interesting
The only observation that can be used to give preference to some models compared to others is the fact that the neutrino masses are very small compared to the charged lepton and quark masses
There are several recent papers devoted to the study of the production of heavy neutrinos and new gauge bosons at TeV energy scale, see e.g. Ref. [5]- [9]
Summary
Among several ext¢en¡¤s£¦io¥n§ s©o f t¢h¡¤e St¥ a#n©d ard¢¡¤M!8o¥d#e©l (SM¡&)¥(')th© at can be tested at LHC, see e.g. [1], the left-right (LR). The 4 s can be the partners (4 ) of the light provide their non-zero masses through the see-saw mechanism [3] This makes LR model very attractive, since recent results from atmospheric, solar and reactor neutrino experiments confirm the existence of neutrino oscillations, see e.g. Experiments searching for signals from 4 s with masses in the LHC energy range look quite promising, since the large number of extensions of the LR model predict the heavy neutrino masses to be somewhere between several hundred GeV and a few TeV [1]. There are several recent papers devoted to the study of the production of heavy neutrinos and new gauge bosons at TeV energy scale, see e.g. Ref. In this paper we discuss the production and the experimental signature of heavy Majorana neutrinos and the associated.
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