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2017:groups:np:nonthermal

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People interested: Bryan Zaldivar, José Zurita, Jérémie Quevillon, Jose Miguel No, Nishita Desai, Julia Harz, Daniele Barducci, Dipan Sengupta (dipan@pa.msu.edu), Haiying Cai, Felix Bruemmer, Andreas Goudelis, Gabriel Facini

Understand the connection between freeze-in models and LLP signatures at the LHC. Is it a generic feature of freeze-in models?

References:

  1. Original freeze-in paper: Hall, Jedamzik, John March-Russell, West arXiv
  2. LLP signatures: Co, D'Eramo, Hall, Pappadopulo arxiv

Deliverables:

- A minimal UFO model implementing the idea (YMMV!) External Link

- Mathematica Notebook (or similar) calculating input parameters (TBD).

- Note on “FIMP production via decay” by Bryan boltzmann_fimp.pdf

Triggers (ATLAS): There was some discussion as to what triggers are possible for displaced leptons. This talk from the LLP workshop has some hand drawn plots outlining the trigger possibilities in each region (pg 7-8) https://indico.cern.ch/event/607314/contributions/2542332/attachments/1449594/2234900/LLP_trigger_discussion_group_summary_26april2017.key.pdf It is a bit annoying to read but it is public :p. For muons you can go all the way out to the MS while prompt muon triggers pick decays out to 1 cm with pT~20 GeV (this is for your general consideration, don't quote that in a paper, please) For electrons, there is no explicit d0 cut in the trigger, but I am trying to find out if there are hit level requirements such as requiring a hit on the first tracking layer which might limit the acceptance.

2017/groups/np/nonthermal.1498050037.txt.gz · Last modified: 2017/06/21 15:00 by gabriel.facini