Dear all,

    you can find below a short summary of today's meeting.
    Please let me know if there are mistakes and if I forgot
    to mention any important item. 

     Thanks, cheers

            Fabiola


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Minutes of the Shower Parametrization (SP) meeting held on 4/7/2006 ==================================================================

*** Andrea summarized the work made so far (mainly by A.Waugh).
    Showers in all EM calorimeters (EM barrel, EM end-cap,
    first section of FCAL) are parametrized using G4Flash.
    No attempt has been made to parametrize EM showers 
    in Tilecal, HEC and FCAL2/3. The scope and need for
    the parametrization of hadronic showers are not clear today
    given that the CPU is dominated by the EM component. 
    First validation results have been presented by A.Waugh
    at the LAr week on 19 June. They show significant gain
    in CPU compared to full sim., and in general good agreement 
    between SP and full sim. 
    
*** Fabiola proposed to continute the validation work started
    by A.Waugh by looking first at single particles (electrons,
    pions) at various energies and rapidities and then at full
    events (Z--> ee, di-jets, minimum-bias) using
    Release 12.0.1 and following Releases. This work should allow
    us to find problems (if any), improve the parametrization
    (if needed) and tune the parameters, define the details of the geometry 
    and energy ranges where the parametrization is worth using, etc.
    The goal is to complete the above work (Phase 1) by the next 
    Trigger & Physics week (30 October - 2 November).
    Phase 2, to be carried out with the Combined Performance, 
    Trigger and Physics groups, will address the scope of SP,
    and more in general our simulation strategy in view of data
    taking: i.e. which physics channels and trigger studies
    will be based on SP and which ones on ATLFAST or full sim.
    
*** Decisions:
    -- All datasets of CSC Sample A will be simullated also in
       SP mode. This will provide lots of single particles and
       physics samples for the validation.
    -- Hold bi-weekly phone meetings on Tuesday at 17:00 (Geneva
       time) alternating with the Physics Validation meeting.
       Hence the next two SP meetings will be held on 25 July and
       8 August. 
    -- In a few months from now, when the SP validation work will be more 
       advanced, this group can be absorbed in the Physics Validation 
       group run by D.Costanzo. 
    
*** Everybody: send suggestions to Fabiola about who should 
    organize SP meetings and overview the activity
    
*** Everybody: let Fabiola know on which item(s) you want to work.