ATLAS DC2 SUSY
Challenge
Updated March 29 2004
Introduction
The goals of the SUSY Working Group for DC2 are to validate the new
simulation and reconstruction software and carry out sample physics
analyses using data generated at two SUSY points.
The first model point is that used at DC1 and is described here. The DC1
analysis was written up in
ATL-COM-PHYS-2003-055.
The second is a 'coannihilation' model with soft taus as described
here.
Further details of the generation phase can be found here
Plans and Timescales
(1) Before beginning of May: Validation of 8.0.x
Now - As many people as possible should download Frank's
analysis code and try to understand what it does. A test file is
available
here.
When 8.0.x is ready and working, use to reconstruct existing DC1
sample at LBL/BNL (should take no more than 1 night). Make root
ntuples available to people either to run FEP code at e.g. BNL (if they have
accounts) or to download and analyse locally using FEP code. b-tagging
may not be present in 8.0.x (we hope it is) but we should not get hung
up on it if not. Fortran b-tagging code exists but probably not worth
the effort of translation unless there is a specific volunteer. Need
volunteers to look at specific physics objects (as in DC1) and produce
plots (see below). Same goes for physics plots (should be same
people).
(2) Between beginning of May and middle of July (pre-production):
Validation of new G4 simulation and first new physics plots.
As soon as DC2 pre-production samples are ready run 8.0.x at LBL/BNL
and make output root ntuples available. Same people who validated
8.0.x with DC1 sample should then repeat with new DC2 data from DC1
model point (20k events) - produce same plots. First use no pile-up
data (to validate simulation), then use pile-up (to re-validate 8.0.x
in presence of pile-up). Feed back results to
validation team asap. Also study co-annihilation events for
validation and new physics plots (jobOptions here
, auxiliary file here
).
(3) After middle of July:
Use 9.0.x locally and/or at LBL/BNL to reconstruct DC2 samples -
validate 9.0.x with(out) pile-up. Output will be in AOD form and will
have to be analysed using
PAT framework - requires porting of analysis code (from FEP
package etc.) into PAT framework. Will use main reconstruction effort
as well but will not wait for it as may well have problems (we may
need to hack the code ourselves locally). Make same validation plots
for 9.0.x and physics plots.
Continuous production phase: At least 100k co-annihilation events (jobOptions here
, auxiliary file here
) +
other model points as we wish (please give thought to this). One good
suggestion is a Focus Point model. Repeat simulation/reconstruction
effort to produce lots more nice physics plots!
Tasks
The following tasks need volunteers:
(i) Validate tauola with atlfast output at co-annihilation point. (Now)
Atlfast ntuple is here
(ii) Download and experiment with analysis code from FEP (ALL)
Root ntuple analysis code is now available here, together with a
test file.
(iii) Analyse reconstruction output sarting with 8.0.x, 9.0.x etc. to
produce validation plots as in
ATL-COM-PHYS-2003-055:
. electrons/photons (Fabiola)
. muons
. taus
. jets
. etmiss (Dan)
(iv) Produce physics plots (these people should also work on (iii)) as in
ATL-COM-PHYS-2003-055:
. jet signatures
. electron/muon signatures
. tau signatures
. combined signatures
(v) experiment with local installation of reconstruction using kits
(speak to Fred Akesson) (now)
(vi) port FEP analysis code to
PAT framework (before July).
Aim should be to produce ATLAS note(s) summarising validation and
physics studies as was done for DC1, as well as continuous feedback to
validation.
Logistics and Progress
Root ntuple analysis code is now available here, together with a
test file.
Agendas and Minutes
15 March 2004: DC2 SUSY
Challenge Phone Conference
Mailing list of ATLAS SUSY Working Group
Dan Tovey Modified 29 March 2004