1. Searching for Doubly-Charged Higgs at the LHC Sá Borges, Cieza Montalvo Mauro Tonasse Nelson Cortez Universidade do Estado do Rio de Janeiro - Instituto de Física Universidade Estadual Paulista – Campus de Registro Universidade Estadual Paulista – Instituto de Física Teórica

2. Outline Introduction Left-Right Model Experimental Bounds 3-3-1 Model Pair Production at the LHC Partial Widths Results and Conclusion

3. Left-Right Symmetric Model Broken to SM byInvariance requires Scalars

4. Couplings Experimental constraints Interactions (lepton number violation ) Bhabha Scattering Muonium-antiMuonium  +  e+ e+ e- (g-2)  small off-diagonal couplings left-handed

5. One Doubly Higgs Production Physical single charged scalars (proton –proton)

6. Conclusion W W fusion (H ++) Exceed Drell-Yan (H ++ H --) 2.41.75 Cross Section Proton-Proton

7. Pair Production Cross section General

8. Tevatron LHC

9. Experimental Bounds

10. SU(3) c x SU(3) L x U(1) N SM chiral extension Solve family’s replication problem Colors anomaly cancelation Seesaw mechanism Charge Operator

11. Overview Left-Handed Leptons Quark Sector Scalar Sector Higgs Potential Gauge Bosons

12. Symmetry Breaking Neutral Sector Charged Sector

13. The Production of a Pair of Doubly Charged Higgs at LHC in the 3-3-1 Model

14. Drell-Yan Mechanism Gauge Bosons Scalars

15. Gluon-Gluon Fusion only scalars

16. Quark loop contribution for the scalar and the quarks quark and scalar couplings

17. Exotic Particles Masses E M T 190114026001300103018302200 600 Parameters 1 2 3 4 5 6 7 8 9 - 1.2 - 1. - 2.84 - 1.57 1. - 3. - 1.

18. Numerical values for Total Cross Section Convolute parton momentum spectra using CTEQ5 Numerical Integration by VEGAS Quarks, gluons

19. Comparison

20. Left-Right Model

21. Comparison

22. 0.0010.080.005 3.0 6.0 2.0 19.0 29.0444 Branching Ratios

23. Conclusion Large number of doubly charged scalars produced by Drell-Yan mechanism Small branching ratio for ordinary quarks and leptons production Thank you Pair of Doubly Charged Higgs Production at LHC 3-3-1