LHC Dark Matter Working Group Twiki page

The LHC Dark Matter Working Group (LHC DM WG) brings together theorists and experimentalists to define guidelines and recommendations for the benchmark models, interpretation, and characterisation necessary for broad and systematic searches for dark matter at the LHC. As examples, the group develops and promotes well-defined signal models, specifying the assumptions behind them and describing the conditions under which they should be used. It works to improve the set of tools available to the experiments, such as higher- precision calculations of the backgrounds. It assists theorists with understanding and making use of LHC results. The LHC DM WG develops and maintains close connections with theorists and other experimental particle DM searches (e.g. Direct and Indirect Detection experiments) in order help verify and constrain particle physics models of astrophysical excesses, to understand how collider searches and non-collider experiments complement one another, and to help build a comprehensive understanding of viable dark matter models.

Here is the information for this working group:

Current projects and people interested / actively working on them:

If you are interested in one or more of these topics, join the lhc-dmwg-contributors@cernNOSPAMPLEASE.ch mailing list for announcements on the working meetings, and add your name here.

2HDM + pseudoscalar (concluding)

This effort focuses on the definition of further simplified models. We are studying a suggestion for a parameter scan of a Type-II 2HDM model with a pseudoscalar and a DM particle, and its connections to cosmology. We have finalized the parameter scan and we are currently. For the current draft, see https://github.com/LHC-DMWG/DMWG-2HDM-whitepaper/blob/DMWG_edited/DMWG-2HDM-whitepaper_Main.pdf.

People: Giorgio Busoni, Nicole Bell, Francesca Ungaro, Lars Henkelmann, Oleg Brandt, Martin Bauer, Eiko Yu, Benedikt Maier, Andreas Albert, Yu-Heng Chen, Katharina Behr, Priscilla Pani, Giacomo Polesello, Stanislava Sevova, Kevin Sung, Lailin Xu, Ycheng Guo, Kayla McLean, Chris Anelli.

Dark photon

This effort focuses on connecting ATLAS, CMS, and LHCb results on light, very-weakly-coupled mediators to the results for heavier mediators, and developing comparisons within one or more benchmark models (such as dark photons) in a fashion similar to https://arxiv.org/abs/arXiv:1703.05703. It also provides a discussion forum for those interested in using the tools that relate these benchmarks to non-collider observables, especially the dark matter abundance in freeze-out or freeze-in (and potentially other) scenarios, and understanding where and how such information can be useful (and where its usefulness is limited)

People so far: Stefano Giagu, Phil Ilten, Mike Williams, Kenji Hamano, Alexandre Arbey, Isabelle John, Genevieve Belanger, Bryan Zaldivar

Single top

This effort focuses on provide guidelines for ATLAS and CMS of how to calculate and interpret the calculations of the t/s-channel single-top + MET and Wt + MET signatures, in particular concerning the theoretical issue arising in the spin-0 DMF simplified models where the relevant scattering amplitudes violate unitarity in the limit of large centre-of-mass energies.

People so far: Priscilla Pani, Susanne Westhoff, Fabio Maltoni, Deborah Pinna, Nicole Bell, Claudia Seitz, Giacomo Polesello.

GIT repository

GitLab: https://gitlab.cern.ch/lhc-dmwg-material/

Contains:

  • Model UFOs
  • Simplified model width calculator script
  • Relic density curves for simplified models
  • Cross-sections for 2HDM+PS model

GitHub: https://github.com/LHC-DMWG

Contains:

  • 2HDM+PS whitepaper draft

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Topic revision: r5 - 2018-05-15 - CaterinaDoglioni
 
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