Version 13 (modified by BenjF, 5 weeks ago) (diff) 

DMSimpt: A general framework for tchannel dark matter models at NLO in QCD
Contact Information
Benjamin Fuks
 LPTHE / Sorbonne U.
 fuks @ lpthe.jussieu.fr
Chiara Arina
 UC Louvain
 chiara.arina @ uclouvain.be
Luca Mantani
 UC Louvain
 luca.mantani @ uclouvain.be
See arXiv:2001.05024 [hepph].
Model Description and FeynRules Implementation
We extend the Standard Model by a dark matter candidate X and a coloured mediator Y. The model includes several spin possibilities for X and Y, the dark matter being either of a Majorana nature or not and of spin equal to 0, 1/2 or 1. The mediator is accordingly of spin 1/2 (scalar or bosonic dark matter) or 0 (fermionic dark matter). The model Lagrangian is given by
The first term consists in the Standard Model Lagrangian, the second one includes gaugeinvariant kinetic and mass terms for all new fields and the last ones describe the interactions of the dark matter state with the mediator and the Standard Model. The latter focus respectively on Dirac fermion, Majorana fermion, complex scalar, real scalar, complex vector and real vector dark matter, and are given by
where φ and ψ consists in coloured scalar and fermionic mediators.
The above Lagrangian was implemented in the Feynman gauge into FeynRules 2.3.35. QCD renormalisation and R_{2} rational counterterms were determined using NLOCT v1.02 and FeynArts 3.9. Feynman rules were collected into a single UFO, in which 5 flavours of massless quarks are considered, which enables treelevel calculations at LO and NLO QCD and loopinduced calculations at LO QCD using MadGraph_aMC@NLO.
The above new physics couplings can be controlled on runtime through the Les Houches blocks DMS3Q, DMS3U, DMS3D (scalar mediator interactions with the Q_{L}, u_{R} and d_{R} quarks), as well as DMF3Q, DMF3U, DMF3D (scalar mediator interactions with the Q_{L}, u_{R} and d_{R} quarks). The mass of the new particles can be modified through the usual mass blocks. The PDG codes of the new particles are:
 Dark matter: 51 (real scalar), 52 (Majorana fermion), 53 (real vector), 56 (complex scalar), 57 (Dirac fermion) and 58 (complex vector).
 Scalar mediators: 1000001 (φ_{dL}), 1000002 (φ_{uL}), 1000003 (φ_{sL}), 1000004 (φ_{cL}), 1000005 (φ_{bL}), 1000006 (φ_{tL}), 2000001 (φ_{dR}), 2000002 (φ_{uR}), 2000003 (φ_{sR}), 2000004 (φ_{cR}), 2000005 (φ_{bR}) and 2000006 (φ_{tR}).
 Fermionic mediators: 5910001 (ψ_{dL}), 5910002 (ψ_{uL}), 5910003 (ψ_{sL}), 5910004 (ψ_{cL}), 5910005 (ψ_{bL}), 5910006 (ψ_{tL}), 5920001 (ψ_{dR}), 5920002 (ψ_{uR}), 5920003 (ψ_{sR}), 5920004 (ψ_{cR}), 5920005 (ψ_{bR}) and 5920006 (ψ_{tR}).
More information can be found in arXiv:2001.05024 [hepph].
Model Files (and more)
 FeynRules model files:
 sm.fr: Accompanying SM implementation.
 dmsimpt_v1.2.fr: Main DMSimpt FeynRules model.
 Restriction file relevant for the 5FNS (5 massless quarks).
 Restriction file relevant for a diagonal CKM matrix.
 useDMsimpt.nb: Illustrative Mathematica notebook using the DMSimpt FeynRules model.
 UFO models
 dmsimpt_v1.3.ufo.tgz: Standalone NLO UFO folder in the 5FNS, including all 18 restrictions of arXiv:2001.05024 [hepph].
 dmsimpt_v1.2_s3dur.ufo.tar.gz: Standalone UFO LO folder, in the S3D_uR restriction, with 6 massive quarks.
 dmsimpt_v1.2_s3mur.ufo.tar.gz: Standalone UFO LO folder, in the S3M_uR restriction, with 6 massive quarks.
 CalcHep models
 dmsimpt_v1.2_s3dur.ch.tar.gz: Standalone CalcHep model files with massive quarks, in the S3D_uR restriction.
 dmsimpt_v1.2_s3mur.ch.tar.gz: Standalone CalcHep model files with massive quarks, in the S3M_uR restriction.
Attachments (11)

sm.fr
(23.6 KB) 
added by BenjF 5 months ago.
Standard Model FeynRules implementation

dmsimpt_v1.2.fr
(10.8 KB) 
added by BenjF 5 months ago.
DMSimpt FeynRules implementation (version 1.2)

DiagonalCKM.rst
(523 bytes) 
added by BenjF 5 months ago.
FeynRules Restriction file for a diagonal CKM matrix

Massless_5f.rst
(781 bytes) 
added by BenjF 5 months ago.
FeynRules restriction file of the 5FNS

dmsimpt_v1.2_s3mur.ch.tar.gz
(11.3 KB) 
added by BenjF 5 months ago.
CalcHep model files for the S3M_uR restriction

dmsimpt_v1.2_s3dur.ch.tar.gz
(10.7 KB) 
added by BenjF 5 months ago.
CalcHep model files for the S3D_uR restriction

dmsimpt_v1.2_s3mur.ufo.tar.gz
(19.8 KB) 
added by BenjF 5 months ago.
UFO model for the S3M_uR restriction

dmsimpt_v1.2_s3dur.ufo.tar.gz
(34.9 KB) 
added by BenjF 5 months ago.
UFO model for the S3D_uR restriction

dmsimpt_v1.2.ufo.tar.gz
(97.9 KB) 
added by BenjF 5 months ago.
NLO UFO model including all 18 restrictions

useDMsimpt.nb
(16.6 KB) 
added by BenjF 5 months ago.
Illustrative !Mathematica notebook
 dmsimpt_v1.3.ufo.tgz (686.5 KB)  added by BenjF 5 weeks ago.
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