γγ → pp̅,   γγ → π⁺π⁻,   γγ → π⁰π⁰

Contributor

Links

• HyperNews posting: Trigger Statistics Survey (some two-photon physics samples)
• More detail: Trigger Statistics for Selected Modes in Two-photon Physics

Signal Modes

: Mode : Decfile                         : Generator : Filter : Run Type                               :
: 5939 : gamgam-prpr.flat.2.1-4.5gev.tcl : continuum :        : two-photon -> p+ p-; 2.1 < W < 4.5 GeV :
: 5936 : gamgam-pipi.flat.2.1-4.5gev.tcl : continuum :        : 2-photon -> pi+ pi-; 2.1 < W < 4.5 GeV :
(also several privately-generated samples - see Selina's page)

Cuts

• CALORIMETER:
  • energy > 0.020 GeV
  • -0.780 < cos(theta) < 0.960
• DRIFT CHAMBER:
  • momentum > 0.080 GeV/c
  • -0.930 < cos(theta) < 0.970

Files

TriggerStatistics-pipi-lowW.*

SP-5936 with W < 3.0, Runs 1-5.

TriggerStatistics-pp.*

p+ p- signal MC (all W).

TriggerStatistics-pp-lowW.*

SP-5939 run 5, W < 3.0.

TriggerStatistics_twoPhoton_pipi.*

pi+ pi- signal MC, runs 1-5 (all W).

TriggerStatistics-AccBkg.ps.gz

pi0 pi0 signal MC, all W.

TriggerStatistics-pi0pi0_W0.ps.gz

pi0 pi0 signal MC, W < 2.0.

TriggerStatistics-pi0pi0_W01.ps.gz

pi0 pi0 signal MC, 2.0 < W < 2.5.

TriggerStatistics-pi0pi0_W1.ps.gz

pi0 pi0 signal MC, W < 2.5 (union of the above two).

TriggerStatistics-pi0pi0_W2.ps.gz

pi0 pi0 signal MC, 2.5 < W < 3.5.

TriggerStatistics-pi0pi0_W3.ps.gz

pi0 pi0 signal MC, W > 3.5.

 Name                           Last modified      Size  Description
 README                         13-Sep-2006 15:46   71   
 SP9plots/                      12-Nov-2007 18:34    -   
 SUMMARY                        07-Nov-2006 12:11  2.0K  
 TriggerStatistics-AccBkg.ps.gz 01-Dec-2006 10:51   22K  
 header.inc                     07-Dec-2007 13:09  8.9K  
 plots/                         05-Dec-2006 16:31    -   
 results/                       05-Dec-2006 16:31    -