Searching for Weak Singlet Charged Scalar at the Lhc
Gang Li3,1*, Jue Zhang2, Ke-Pan Xie1, Qing-Hong Cao1,4,2
1Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China
2Center for High Energy Physics, Peking University, Peking University, Beijing, China
3Department of Physics, National Taiwan University, Taipei, Taiwan
4Collaborative Innovation Center of Quantum Matter, Peking University, Beijing, China
* Presenter:Gang Li, email:gangli@phys.ntu.edu.tw
Weak singlet charged scalar exists in many new physics models beyond the Standard Model. In this work we show that a light singlet charged scalar with mass above 65 GeV is still allowed by the LEP and LHC data. The interactions of the singlet charged scalar with the Standard Model particles are described by operators up to dimension-5. Dominant decay modes of the singlet charged scalar are obtained, and a subtlety involving field redefinition and gauge fixing due to a dimension-5 operator is also clarified. We demonstrate that it is promising to observe the singlet charged scalar at the LHC.


Keywords: singlet charged scalar, LHC, effective operators