3 documents found, page 1 of 1
Z' production in 331 models
Dueñas,J. G.; Martínez,R.; Ochoa,F.We analyse the possibilities to detect a new Z' boson in di-electron events at LHC in the framework of the 331 model with right-handed neutrinos. For an integrated luminosity of 100fb-1 at LHC, and considering a central value Mz' = 1500 GeV, we obtain the invariant mass distribution in the process pp → Z' → e+e-, where a huge peak, corresponding to 800 signal events, is found above the SM background. The number...
Family dependence in 331 models
Martínez,R.; Ochoa,F.Using experimental results at the Z-pole, and considering the ansatz of Matsuda as an specific texture for the quark mass matrices, we perform a chi2 fit at 95% CL to obtain family-dependent bounds to Z' mass and Z-Z' mixing angle in the framework of the main versions of 331 models. The allowed regions depend on the assignment of the physical quark families into different representations that cancel anomalies. ...
The process mu -> nue e$\bar{\nu}$mu in the 2HDM with flavor changing neutral c...
Diaz,Rodolfo A.; Martínez,R.; Poveda,NicanorWe consider the process m -> nue e$\bar{\nu}$mu in the framework of a two Higgs doublet model with flavor changing neutral currents (FCNC). Since FCNC generates in turn flavor changing charged currents in the lepton sector, this process appears at tree level mediated by a charged Higgs boson exchange. From the experimental upper limit for this decay, we obtain the bound |ximue/mH+| < 3.8 x 10-3 GeV-1, where xim...