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Validation and Comparison of BHLUMI and BHWIDE Event Generators for Bhabha Events

This document introduces BHLUMI, an event generator for radiative and non-radiative Bhabha events, developed to bridge the gap between the wide-angle Bhabha generator BHWIDE and the 0-angle generator BbrBBbrem. It outlines the implementation status, early validation studies, and the integration with BgsApp. The detailed event tracking data for various events are included, showcasing the performance of BHLUMI in comparison to BHWIDE. Presented by researchers from the University of Oregon on March 6, 2005.

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Validation and Comparison of BHLUMI and BHWIDE Event Generators for Bhabha Events

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  1. Bhlumi status Nick Blount Bill Lockman David Strom

  2. Introduction Tags used Skip ahead validation Bhwide validation Preliminary Bhwide and Bhlumi comparison 3 4 5 6 7 Table of Contents University of Oregon - Mar 6, 2005

  3. Introduction • Bhlumi is an event generator of radiative and non-radiative Bhabha events • We are implementing it to bridge the gap between the wide angle Bhabha generator BHWIDE and the 0-angle Bhabha generator BbrBBbrem • It is now successfully compiling and running with BgsApp, and is undergoing early validation studies. University of Oregon - Mar 6, 2005

  4. Tags used • Release 16.0.4 • BgsApp V00-04-10 (Release uses V00-04-08) • GenFwkInt V00-08-07 (Release uses V00-08-04) • PackageList V00-09-09-04 (Release uses V00-09-09-02) • SimUtils V00-08-17 (Release uses V00-08-16) • bhlumi V00-01-01 (not in Release) • bhwide V00-02-03 (Release uses V00-02-03) University of Oregon - Mar 6, 2005

  5. The following is the StdHep Track info for event 5 with FIRSTEVT 1 StdHepPrint:StdHep Track info for event 5 : Trk# Stat Id Dtr1 DtrN Mom1 MomN Px Py Pz E Vx Vy Vz 1 3 e- 3 7 0 0 -0.1685 0.0001 8.9860 8.9876 0.0869 0.3297 0.0407 2 3 e+ 3 7 0 0 0.0585 0.0017 -3.1093 3.1098 0.0869 0.3297 0.0407 3 1 e- 0 0 1 2 -1.2526 0.2512 -2.9384 3.2041 0.0869 0.3297 0.0407 4 1 e+ 0 0 1 2 1.1428 -0.2494 8.8155 8.8927 0.0869 0.3297 0.0407 5 1 gamma 0 0 1 2 -0.0002 0.0000 -0.0005 0.0005 0.0869 0.3297 0.0407 6 1 gamma 0 0 1 2 0.0000 -0.0000 0.0001 0.0001 0.0869 0.3297 0.0407 7 1 gamma 0 0 1 2 -0.0000 0.0000 0.0000 0.0000 0.0869 0.3297 0.0407 The following is the StdHep Track info for event 1 with FIRSTEVT 5 StdHepPrint:StdHep Track info for event 1 : Trk# Stat Id Dtr1 DtrN Mom1 MomN Px Py Pz E Vx Vy Vz 1 3 e- 3 7 0 0 -0.1685 0.0001 8.9860 8.9876 0.0869 0.3297 0.0407 2 3 e+ 3 7 0 0 0.0585 0.0017 -3.1093 3.1098 0.0869 0.3297 0.0407 3 1 e- 0 0 1 2 -1.2526 0.2512 -2.9384 3.2041 0.0869 0.3297 0.0407 4 1 e+ 0 0 1 2 1.1428 -0.2494 8.8155 8.8927 0.0869 0.3297 0.0407 5 1 gamma 0 0 1 2 -0.0002 0.0000 -0.0005 0.0005 0.0869 0.3297 0.0407 6 1 gamma 0 0 1 2 0.0000 -0.0000 0.0001 0.0001 0.0869 0.3297 0.0407 7 1 gamma 0 0 1 2 -0.0000 0.0000 0.0000 0.0000 0.0869 0.3297 0.0407 Skip ahead validation University of Oregon - Mar 6, 2005

  6. StdHep info for BHWIDE with BHLUMI present: StdHepPrint:StdHep Track info for event 1 : Trk# Stat Id Dtr1 DtrN Mom1 MomN Px Py Pz E Vx Vy Vz 1 3 e- 3 4 0 0 -0.1685 0.0001 8.9860 8.9876 0.0869 0.3297 0.0407 2 3 e+ 3 4 0 0 0.0585 0.0017 -3.1093 3.1098 0.0869 0.3297 0.0407 3 1 e- 0 0 1 0 -4.5629 -2.4206 4.4852 6.8408 0.0869 0.3297 0.0407 4 1 e+ 0 0 1 0 4.4529 2.4225 1.3915 5.2567 0.0869 0.3297 0.0407 first event of standard BHWIDE without BHLUMI: StdHepPrint:StdHep Track info for event 1 : Trk# Stat Id Dtr1 DtrN Mom1 MomN Px Py Pz E Vx Vy Vz 1 3 e- 3 4 0 0 -0.1685 0.0001 8.9860 8.9876 0.0869 0.3297 0.0407 2 3 e+ 3 4 0 0 0.0585 0.0017 -3.1093 3.1098 0.0869 0.3297 0.0407 3 1 e- 0 0 1 0 -4.5629 -2.4206 4.4852 6.8408 0.0869 0.3297 0.0407 4 1 e+ 0 0 1 0 4.4529 2.4225 1.3915 5.2567 0.0869 0.3297 0.0407 Bhwide validation University of Oregon - Mar 6, 2005

  7. Bhwide and Bhlumi comparison BHLUMI BHWIDE University of Oregon - Mar 6, 2005

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