= Simplified dark matter models =


== Authors ==
 * s-channel
   * Antony Martini (Université catholique de Louvain) & Kentarou Mawatari (LPSC Grenoble)
      * Emails: kentarou.mawatari @ lpsc.in2p3.fr
 * 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:1509.05785] : M. Neubert, J. Wang, C. Zhang, "Higher-order QCD predictions for dark matter production in mono-Z searches at the LHC". 


== Model files ==

* FR files (for spin-1)
 * [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 add-on model file for spin1 mediators for EW.
 * [http://feynrules.irmp.ucl.ac.be/attachment/wiki/DMsimp/Cabibbo.rst Cabibbo.rst],  [http://feynrules.irmp.ucl.ac.be/attachment/wiki/DMsimp/Massless_5f.rst Massless_5f.rst] : the restriction files.
 * [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 spin-1 model, calculates the Feynman rules and extract the model files within the UFO format.
* FR files (for spin-0)
 * [http://feynrules.irmp.ucl.ac.be/attachment/wiki/DMsimp/dm_s_spin0.fr dm_s_spin0.fr] : the main model file for spin0 mediators.
 * [http://feynrules.irmp.ucl.ac.be/attachment/wiki/DMsimp/dm_s_spin0_ew.fr dm_s_spin0_ew.fr] : the add-on model file for spin0 mediators for EW.
 * [http://feynrules.irmp.ucl.ac.be/attachment/wiki/DMsimp/Cabibbo.rst Cabibbo.rst],  [http://feynrules.irmp.ucl.ac.be/attachment/wiki/DMsimp/Massless_5f.rst Massless_5f.rst] : the restriction files.
 * [http://feynrules.irmp.ucl.ac.be/attachment/wiki/DMsimp/DMsimp_s_spin0.nb DMsimp_s_spin0.nb] : this is an example Mathematica notebook that loads the spin-0 model, calculates the Feynman rules and extract the model files within the UFO format.

* UFO files (for, e.g. MadGraph5_aMC@NLO)
 * [http://feynrules.irmp.ucl.ac.be/raw-attachment/wiki/DMsimp/DMsimp_s_spin1_v2.0.zip DMsimp_s_spin1.zip] : The model files for spin1 mediators.
 * [http://feynrules.irmp.ucl.ac.be/raw-attachment/wiki/DMsimp/DMsimp_s_spin0.zip DMsimp_s_spin0.zip] : The model files for spin0 mediators.

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


== Version updates ==

*2015.08.24 - v1.0: release version. [[BR]]
*2016.09.23 - v2.0: included the Y1-lepton interactions (B.Zaldivar). [[BR]]

== 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~ / a z w+ w- [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 for s-channel mediators ===

* 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 / a z [QCD]
}}}

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

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

* mono-Higgs [[BR]]

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


-----------------------


== Model files for tools for DM relic abundance and DM (in)direct detections ==

* [http://feynrules.irmp.ucl.ac.be/raw-attachment/wiki/DMsimp/DMsimp_s_spin1_LO_UFO.zip DMsimp_s_spin1_LO_UFO.zip] : The model files for spin1 mediators in UFO format (for MadDM).
* [http://feynrules.irmp.ucl.ac.be/raw-attachment/wiki/DMsimp/DMsimp_s_spin0_LO_UFO.zip DMsimp_s_spin0_LO_UFO.zip] : The model files for spin0 mediators in UFO format (for MadDM).
* [http://feynrules.irmp.ucl.ac.be/raw-attachment/wiki/DMsimp/DMsimp_s_spin1_LO_CH.zip DMsimp_s_spin1_LO_CH.zip] : The model files for spin1 mediators in CH format (for MicrOMEGAs).
* [http://feynrules.irmp.ucl.ac.be/raw-attachment/wiki/DMsimp/DMsimp_s_spin0_LO_CH.zip DMsimp_s_spin0_LO_CH.zip] : The model files for spin0 mediators in CH format (for MicrOMEGAs).

(The model keeps all the quark masses finite, and apply only to tree-level processes. In the CH format, we have only Xd without the EW part.)