Towards analysis of egamma stream Requirements (to be discussed also - - PowerPoint PPT Presentation

Requirements (to be discussed also with physics groups):

Towards analysis of egamma stream

• Produce specific stream for photons: probably through D2PD based on trigger

streaming and perhaps loose photon selection

• Produce several D2PD streams for electrons: based on single electrons and

pairs? Or on each primary stream? Or on broad physics topics (such as pairs? Or on each primary stream? Or on broad physics topics (such as J/ψ+Υ ψ+Υ+low-mass DY and W/Z)?

• D2PD streams for electrons need to be enabled with similar tools as photons,

so that reclustering, recalibration, improvements of PID, etc can be configured so that reclustering, recalibration, improvements of PID, etc can be configured and tested by users

• Produce D3PDs within common framework:
• Use common tools

Use common tools

• Ntuple dumper easily configurable by user
• Focus on “small”-size D3PD, i.e. about 10 kB per event

Where do we stand now? Where do we stand now?

• Several proposals made and a few implementations existing (photon

D3PD, D3PDs proposed for egamma by Jae/Scott, custom D3PDs for J/ψ working group, CBNT-like D3PDs discussed by Kamal/David R., etc

CAT physics meeting, 03/04/2009 1

working group, CBNT like D3PDs discussed by Kamal/David R., etc

• After further feedback and discussions, we have converged on a common

proposal on how to proceed

Basic proposal:

1. Use existing DPDMaker framework as the basic framework for egamma:

Towards analysis of egamma stream

g g

• this has numerous advantages since it already supports multiple streams

and sequential production (e.g. of D2PDs and D3PDs)

• additional improvements are in the pipeline for ATLAS-wide use, such as

e g tools to monitor filter performances e.g. tools to monitor filter performances

• easy to configure for individual users if toolkit prepared carefully

2. Put in place in this framework all the required egamma reprocessing tools. Starting point would be photon conversion recovery and re-processing Starting point would be photon conversion recovery and re processing (T. Koffas and S. Snyder will start joint work on this) 3. Agree on a common content and naming convention between electrons and photons wherever relevant for a D3PD of target size ~ 10 kB. Target for specific proposal is egamma P&P meeting on 21st of April. (L. Carminati, S. Snyder and M. Vincter will start joint work on this)

Some (obvious) comments:

• Anyone wishing to contribute to this with constructive ideas and real

work is more than welcome to join

• If we can agree on such a joint approach, egamma will be able to have

d ti f D2PD d D3PD f l t d h t (BNL

CAT physics meeting, 03/04/2009 2

group production of D2PDs and D3PDs for electrons and photons (BNL has offered to participate in this for all egamma)

• Next step very soon is to discuss with SM W/Z group (muons, taus)

Quite some discussion in last W/Z meeting on 30/03/09:

1 Look in particular at talks at

Towards analysis of W/Z signatures

1. Look in particular at talks at

http://indico.cern.ch/getFile.py/access?contribId=3&resId=0&materialId=slides&confId=55065 http://indico.cern.ch/getFile.py/access?contribId=5&resId=0&materialId=slides&confId=55065

2. Focus is mainly on physics DPDs and analysis benchmarks in EWPA y p y y framework with a lot (too much?) of the stuff run in Athena 3. In the discussion, it was agreed that it would make a lot of sense to adopt if feasible a common approach for egamma, muons (and also taus) and W/Z b d f DPD d h DPD i ll l f b h ki based on perf DPDs and phys DPDs in parallel for benchmarking 4. As explained well for example by Massimiliano Bellomo (see next slide), this should be feasible provided one uses flexibility or ROOT trees to decide on level of details written out or accessed by users level of details written out or accessed by users

Upcoming action items:

• Maarten Boonekamp will contact muon CP group to ask them for input
• n common D3PD format
• W/Z signature group and SM group more generally await feedback from

egamma on common D3PD format

CAT physics meeting, 03/04/2009 3

egamma on common D3PD format

• Work required to define primary physics DPD format compatible with

e.g. D2PD for photons

Towards analysis of W/Z signatures

• M. Bellomo

EWPA D3PD Electron object

CAT physics meeting, 03/04/2009 4

Towards analysis of W/Z signatures

• M. Bellomo

EWPA D3PD Track object

CAT physics meeting, 03/04/2009 5

Towards analysis of W/Z signatures

• M. Bellomo

EWPA D3PD Truth object

CAT physics meeting, 03/04/2009 6

Towards analysis of W/Z signatures

Further information on D3PD formats in the egamma world:

1 For information on photon D3PDs look at 1. For information on photon D3PDs, look at

https://twiki.cern.ch/twiki/bin/view/AtlasProtected/HggReco https://twiki.cern.ch/twiki/bin/view/AtlasProtected/HggUserData

2. For information on EventView D3PDs for egamma, look at

http://www.usatlas.bnl.gov/twiki/bin/view/AtlasSoftware/EgammaD3P DMaker html - List of tuple branches DMaker.html - List_of_tuple_branches Next steps:

• Get input directly from jet/ETmiss group (Tancredi?)
• Get input directly from tau group (Yann?)
• Agree on common strategy on how to deal with trigger (volunteers?)

CAT physics meeting, 03/04/2009 7