Top quark spin and $Htb$ interaction in charged Higgs and top quark   associated production at LHC
  We study the charged Higgs production at LHC via its associated production with top quark. The kinematic cuts are optimized to suppress the background processes so that the reconstruction of the charged Higgs and top quark is possible. The angular distributions with respect to top quark spin are explored to study the $Htb$ interaction at LHC. 
Xue Gong, Zong-Guo Si, Shuo Yang, and Ya-juan Zheng
hep-ph