Changes between Version 5 and Version 6 of MSSMD


Ignore:
Timestamp:
Jun 13, 2018 6:15:50 PM (5 days ago)
Author:
WeiShi
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • MSSMD

    v5 v6  
    77
    88== Model Description ==
    9 The model is based on MSSM, but adding a dark sector. The dark sector, ''U(1)D'', is broken, giving rise to light dark photons (''γD'') that weakly couple to the SM particles via a small kinetic mixing with photons. The lightest neutralino ''n1'' in MSSM is no longer stable and can decay via processes such as ''n1 → nD + γD'', where ''nD'' is a light dark neutralino (fermion). In this model, the ''γD'' is mediated by very weak interactions with the SM, and can decay to muon pairs promptly or non-promptly.
     9The model is based on MSSM from the model database, but adding a dark sector, ''U(1)D''. The dark sector is broken, giving rise to light dark photon, ''ad'', that weakly couples to the SM particles via a small kinetic mixing with photons. The lightest neutralino in MSSM, ''n1'', is no longer stable and can decay via processes such as ''n1 → nd + ad'', where ''nd'' is a light dark neutralino. In this model, ''ad'' is mediated by very weak interactions with the SM, and can decay to muon pairs.
    1010
    1111== References ==
     
    1313
    1414== Model Files ==
    15 MSSMD implementation: [http://feynrules.irmp.ucl.ac.be/attachment/wiki/MSSMD/MSSMD.fr]
     15MSSMD implementation: [http://feynrules.irmp.ucl.ac.be/attachment/wiki/MSSMD/MSSMD.fr];
     16Main changes compared to MSSM .fr file are
     17{{{
     18Line 30-31: U1D gauge group
     19Line 41-43: New Physics (NP) interaction order
     20Line 63: Superfield related to the U1D gauge group
     21Line 93-95: Physics field for the dark photon, “ad”
     22Line 106-107: Gaugino for the new U1D gauge boson
     23Line 136-138: Physics field for dark neutralino, “nd"
     24Line 348-349: U1D gauge group coupling constant, “gd"
     25Line 567-568: Vertice for “n1 > ad nd”
     26Line 569-570: Vertice for “ad > mu+ mu-”
     27Line 573: Added vertices to the Lagrangian
     28}}}
     29
    1630
    1731Parameter file: [http://feynrules.irmp.ucl.ac.be/attachment/wiki/MSSMD/sps1a.dat]
     
    2236
    2337== Validation ==
    24 The model is validated by checking kinematic distribution plots from the LHE file generated by MadGraph5.
     38The model is validated by checking kinematic distribution plots from the LHE file generated by MadGraph5 for two dark photon (ad) mass points. Also the distributions are consistent with those from MadGraph4.
    2539
    26 [https://github.com/weishi10141993/DarkSUSY_MC_MG5/tree/master/MSSMDarkSector/MG5_0p25_cT_100_LHE]
     40m(ad)=0.25 GeV: [https://github.com/weishi10141993/DarkSUSY_MC_MG5/tree/master/MSSMDarkSector/MG5_0p25_cT_100_LHE]
    2741
    28 [https://github.com/weishi10141993/DarkSUSY_MC_MG5/tree/master/MSSMDarkSector/MG5_8p5_cT_100_LHE]
     42m(ad)=8.5 GeV: [https://github.com/weishi10141993/DarkSUSY_MC_MG5/tree/master/MSSMDarkSector/MG5_8p5_cT_100_LHE]
    2943
    3044== Acknowledgement ==
    31 The author would like to thank ''F. Elahi'' and ''M. Abdullah'' for helpful discussions.  Thanks to ''B. Fuks'' for the help in the implementation. Thanks to ''O. Mattelaer'' for help interface with MadGraph5.
     45The author would like to thank ''M. Abdullah'' and ''F. Elahi'' for insightful discussions.  Thanks to ''B. Fuks'' for help in the implementation. Thanks to ''O. Mattelaer'' for help interface between UFO and MadGraph5.