wiki:DMsimp

Version 46 (modified by mawatari, 5 years ago) (diff)

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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 note. See more details in

  • 1508.00564 : O. Mattelaer, E. Vryonidou, "Dark matter production through loop-induced processes at the LHC: the s-channel mediator case".
  • 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".
  • 1508.xxxxx : M. Neubert, J. Wang, C. Zhang, "".

Model files

  • FR files
    • dm_s_spin1.fr : the main model file for spin1 mediators.
    • dm_s_spin1_ew.fr : the add-on model file for spin1 mediators for EW.
    • dm_s_spin0.fr : the main model file for spin0 mediators.
    • dm_s_spin0_ew.fr : the add-on model file for spin0 mediators for EW.
    • 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.

(The old alpha version is available here.)

Version updates

*2015.08.24 - v1.0: release version.

Sample commands for MadGraph5_aMC@NLO

NLO process samples for s-channel spin-1 mediators

  • Associated production with jets
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
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
import model DMsimp_s_spin0
generate p p > xd xd~ t t~ / a z w+ w- [QCD] 
  • Associated production with a photon/Z/W
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
import model DMsimp_s_spin0
generate p p > xd xd~ j [QCD]
  • mono-Z
import model DMsimp_s_spin0
generate p p > xd xd~ z / a z [QCD]
  • mono-photon (will be 0 for all couplings)
import model DMsimp_s_spin0
generate p p > xd xd~ a / a z [QCD]
  • mono-Higgs
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

(The model keeps all the quark masses finite, and apply only to tree-level processes.)

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