In order to co-ordinate the groups diphoton activities, a mini group (Helen Hayward, Steve Maxfield and Barry King) has been formed to collaborate on various (di)photon activities with the aim of making an impact in
GMSB and exotic diphoton searches
Tasks
- Finish Susy Csc08 note (link to atlas gmsb twiki page) - Helen editor of non-pointing section
- comparison of various diphoton generators - Barry contributing to dilepton/diphoton note
- Steve to chase Samir for names of generators
- single particle gun, neutralino in full sim ?
- Look into improving reconstruction/identification of nonpointing photons : barry
- write talk on fate rate Trash/CDF history and plans - Helen's talk to dilepton/diphoton group.
- investigate possible Fqcd methods at ATLAS ?
- conversions
- presampler - limited depth, depth varies with eta
- 1st sampling layer.... analyse shower profile
- isolation
- Meet with Daniel F - Helen and Barry 24th Feb.
- What is the H->gammagamma presampler method ??
- Is there a clever way to combine Zprime and timing info for neutralino lifetime extraction ? - Steve ?
- Can we use conversion probability to estimate distance travelled ?
- Can we estimate energy of neutralino somehow ?
Choice of Analysis Framework
suggestions + links:
Meetings
- Meeting with Daniel Froideveaux 24th Feb (H+B)
-
- concentrate on seperating pi0 and photons, 4 possible methods: conversions, presampler, 1st sampling (shower profile) and isolation
- in v13, only etcone20 is present - more choice in v14, but we should ask for it to make sure.
- There will be a group effort at cern looking at fakes (guiliamme unal)
- DF asks whether we can do this work under the umbrella of the egamma group.
- in version 13, the reclustering of egamma objects on the AOD has not been validated... photon clustering uses 5x9. also hits on trackes available.
Helen's notes
- Multivariate analysis for neutralino lifetime
Steve's notes
On Fake Rates
Here are links to some recent talks etc. on fake rate estimation.
- Talk given at November 07 Trigger and Physics Week to the Higgs working group:
- Almost nothing at higher Pt. this from October 23rd CSC exotics Dilepton/Diphoton meeting:
- The CSC note covering this from the exotics perspective is here:
- Available single particle datsets are located :
Diphoton generators etc.
* The DIPHOX home page can be found :
here
* ...and RESBOS:
here
The comparison of RESBOS and DIPHOX generators, again in the lower energy context of H->GammaGamma was discussed in this talk from the November T&P week:
Here are some papers referenced in the above talk:
Barry's notes
--
HelenHayward - 14 Jan 2008