= Simplified dark matter models =

== Authors ==
 * s-channel
   * Antony Martini (Université catholique de Louvain) & Kentarou Mawatari (Vrije Universiteit Brussel)
      * Emails: kentarou.mawatari @ vub.ac.be
 * s-channel (electroweak)
   * Jian Wang (Johnnas Gutenberg University of Mainz) & Cen Zhang (Brookhaven National Laboratory)
      * Emails: cenzhang @ bnl.gov

== Description of the model ==

This is simplified dark matter models for NLO. 
Our lagrangian consists of different types of DM:

* Xr (real scalar DM)
* Xc (complex scalar DM)
* Xd (Dirac spinor DM)
* Xm (Majorana spinor DM) (to be done.)
* ...

and different types of mediators:

* s-channel
  * Y0 (spin-0)
  * Y1 (spin-1)
  * Y2 (spin-2) [to be done.]
  * ...

* t-channel [to be done.]

One can find the model lagrangian in the [http://feynrules.irmp.ucl.ac.be/raw-attachment/wiki/DMsimp/note.pdf note].
See more details in 

* [arXiv:1508.00564] : O. Mattelaer, E. Vryonidou, "Dark matter production through loop-induced processes at the LHC: the s-channel mediator case".
* [arXiv:1508.05327] : M. Backovic, M. Kramer, F. Maltoni, A. Martini, K. Mawatari, M. Pellen, "Higher-order QCD predictions for dark matter production at the LHC in simplified models with s-channel mediators".
* [arXiv:1508.xxxxx] : M. Neubert, J. Wang, C. Zhang, "". 

== '''Model files''' ==

* [http://feynrules.irmp.ucl.ac.be/attachment/wiki/DMsimp/dm_s_spin1.fr dm_s_spin1.fr] : the main model file for spin1 mediators.
* [http://feynrules.irmp.ucl.ac.be/attachment/wiki/DMsimp/dm_s_spin1_ew.fr dm_s_spin1_ew.fr] : the main model file for spin1 mediators for EW.
* [http://feynrules.irmp.ucl.ac.be/attachment/wiki/DMsimp/dm_s_spin1.fr dm_s_spin0.fr] : the main model file for spin0 mediators.
* [http://feynrules.irmp.ucl.ac.be/attachment/wiki/DMsimp/dm_s_spin1_ew.fr dm_s_spin0_ew.fr] : the main model file for spin0 mediators for EW.
* [http://feynrules.irmp.ucl.ac.be/attachment/wiki/DMsimp/DMsimp_s_spin1.nb DMsimp_s_spin1.nb] : this is an example Mathematica notebook that loads the model, calculates the Feynman rules and extract the model files within the UFO format.
* [http://feynrules.irmp.ucl.ac.be/raw-attachment/wiki/DMsimp/DMsimp_s_spin1_UFO.zip DMsimp_s_spin1_UFO.zip] : The model files in UFO format (for MadGraph5_aMC@NLO).
* [http://feynrules.irmp.ucl.ac.be/raw-attachment/wiki/DMsimp/DMsimp_s_spin0_UFO.zip DMsimp_s_spin0_UFO.zip] : The model files in UFO format (for MadGraph5_aMC@NLO).

(The old alpha version is available [https://feynrules.irmp.ucl.ac.be/wiki/DMsimp_alpha here].)


== '''Sample commands for MadGraph5_aMC@NLO'''==

=== NLO process samples for s-channel spin-1 mediators ===

* Associated production with jets [[BR]]

{{{
import model DMsimp_s_spin1
generate p p > xd xd~ j [QCD]
add process p p > xd xd~ j j [QCD]
}}}

* Associated production with a Higgs [[BR]]

{{{
import model DMsimp_s_spin1 
generate p p > xd xd~ h [QCD] 
}}}


=== NLO process samples for s-channel spin-0 mediators ===

* Associated production with a top-quark pair [[BR]]

{{{
import model DMsimp_s_spin0
generate p p > xd xd~ t t~ [QCD] 
}}}

* Associated production with a photon/Z/W [[BR]]

{{{
import model DMsimp_s_spin0 
generate p p > xd xd~ a [QCD]
generate p p > xd xd~ z [QCD]
generate p p > xd xd~ w+ [QCD]
generate p p > xd xd~ w- [QCD] 
}}}


=== LO loop-induced process samples ===

* mono-jet [[BR]]

{{{
import model DMsimp_s_spin0
generate p p > xd xd~ j [QCD]
}}}

* mono-Z [[BR]]

{{{
import model DMsimp_s_spin0
generate p p > xd xd~ z [QCD]
}}}

* mono-photon (will be 0 for all couplings) [[BR]]

{{{
import model DMsimp_s_spin0
generate p p > xd xd~ a [QCD]
}}}

* mono-Higgs [[BR]]

{{{
import model DMsimp_s_spin0
generate p p > xd xd~ h [QCD]
}}}


=== Version updates ===

*2015.08.24 - v1.0: release version. [[BR]]