* Title: Enhanced Charged Higgs Production through W±-Higgs Fusion
* Speaker: Jae Sik Lee(Chonnam National University)
* Date: 3:00 PM, November 20 2015
* Place: CTPU Seminar Room, KAIST Munji Campus
* Abstract: We study the associated production of a charged Higgs boson with
a bottom quark and a light quark at the LHC via p p \to H^\pm\,b\,j in the
Two Higgs Doublet Models (2HDMs). Using the effective W approximation, we
show that there is exact cancellation among various Feynman diagrams in
high energy limit. This may imply that the production of charged Higgs can
be significantly enhanced in the presence of large mass differences among
the neutral Higgs bosons via W^\pm-Higgs fusion in the p p \to H^\pm\,b\,j
process. Particularly, we emphasize the potential enhancement due to a
light pseudoscalar boson A, which is still allowed by the current data by
which we explicitly calculate the allowed regions in (M_A,\,\tan\beta)
plane, and show that the production cross section can be as large as 0.1
pb for large tanβ. We also show that the transverse momentum distribution
of the b quark can potentially distinguish the W^\pm-A fusion diagram from
the top diagram. Finally, we point out further enhancement when we go
beyond the 2HDMs.