Search for Doubly Charged Higgs boson at the LHC

• Main Authors: Jung Chang, 張蓉
• Other Authors: Cheng-Wei Chiang
• Format: Others
• Language: en_US
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/98602417892569008958

碩士 === 國立中央大學 === 物理研究所 === 99 === Searching for doubly charged Higgs bosons H ++ with lepton number violating decay can be a clean multi-lepton signature at the CERN LHC. To discover the doubly charged Higgs bosons, we can have these production mechanism pp → H ++ H −− and pp → H ±± H± . In the HTM, keep the Higgs potential quartic terms will open the mass difference between different scalar fields. In particular mass spectrum, singly charged Higgs bonson/CP-even, CP-odd neutral Higgs boson can decay into doubly charged Higgs boson/singly charged Higgs boson and a virtual W boson. The process with CP- even and CP-odd neutral Higgs bosons, singly charged Higgs bosons: pp → A0H0, pp → A0H± , pp → H0H ± followed by the decay H0 → H± W ∗ , A0 → H ± W ∗ , H ± → H ±± W ∗ can be a source for H ++ production. In this thesis, I present the result of H ++ search at LHC √s = 7/14 TeV, consider the additional source contribution to doubly charged Higgs boson production, use same kinematic cuts for 4 charged lepton or 5 charged lepton in final state and the SM background to see the significance. We found out the additional source can improve the H ++ detection potential at the LHC.