DMsimp: dm_s_spin1_ew.fr

(* ****************************************************************** *)
(* *****                                                        ***** *)
(* *****  FeynRules model file: Simplified s-channel DM models  ***** *)
(* *****  Author: A. Martini, K. Mawatari                       ***** *)
(* *****          J. Wang, C.Zhang                              ***** *)
(* *****                                                        ***** *)
(* ****************************************************************** *)

(* ************************** *)
(* *****  Change  log   ***** *)
(* ************************** *)

(* 2015.08.24 v1.0 - release version. *)


(* ************************** *)
(* *****   Parameters   ***** *)
(* ************************** *)  
M$Parameters = {

(* EW couplings with the spin-1 mediator *)
 gVh == { 
      ParameterType -> External,
      InteractionOrder -> {DMV, 1},
      BlockName -> DMINPUTS,
      TeX -> Subscript[g,Vh],
      Description -> "h-Y1 vector coupling",
      Value -> 0. }

};


(* ************************** *)
(* *****   Lagrangian   ***** *)
(* ************************** *)

L1SMEW := Module[{ii}, ExpandIndices[
        I gVh/2*(Phibar[ii] DC[Phi[ii],mu] - DC[Phibar[ii],mu] Phi[ii]) Y1[mu],
        FlavorExpand->{SU2D,SU2W}]];