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Study of Low-pT Pi0 Finding Efficiency in dAu Collisions at 200 GeV

This study focuses on the efficiency of finding low-pT (below 2.5 GeV) pi0 particles in dAu collisions at 200 GeV. The research utilizes STAR collaboration's simulation data, employing the Hijing 1.383 generator while considering specific vertex parameters and shadowing effects. It features a detailed analysis of the parameters needed for the FMS-BEMC correlation study, including a total of 0.3 million events processed with significant CPU resources. The results support ongoing studies of particle production and jet quenching in heavy ion collisions.

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Study of Low-pT Pi0 Finding Efficiency in dAu Collisions at 200 GeV

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  1. BEMC low-pt pi0 efficiency study dau 200 L. Bland, E. Braidot, A. Ogawa

  2. General parameters Requested by: JLC PWG Reasoning: Needed for FMS-BEMC correlation study Task: study of low-pT(below 2.5GeV) pi0 finding efficiency Beam: dAu 200 Vertex: <X>= 0 σx = 0.01 <Y>= 0 σy = 0.01 <Z>= 0. σz = 60 Zcut = +- 200 StarSoft local

  3. Generator Generator: Hijing 1.383 Minbias Control file: ' Frame/Energy ' 'CMS' 200. ' Projectile type/A/Z ' ‘A' 2 1 (heading west/+z) ' Target type/A/Z ' ’A' 197 79 (heading east/-z) ' Impact parameter min/max (fm) ' 0. 20 ' Jet quenching (1=yes/0=no) ' 0 ' Hard scattering/pt jet ' 0 -1 (no upper limit) ' Max # jets per nucleon (D=10) ' 10 ' Set ihpr2(11) and ihpr2(12) ' 1 (baryon prod model) 1(decay) ' Set ihpr2(21) and ihpr2(18) ' 1(history) 0(B production) ' set B production ' 1.5 ' istat=1 old istat>1 new ' 2 ' Set ihpr2(6) ' 0 and 1 (see next page)

  4. Statistics Total 0.3 M events 0.15M with shadowing off ihpr2(6)=0 0.15M with shadowing on ihpr2(6)=1 StarSoft local

  5. Geometry • Geometry y2008a StarSoft local

  6. Resources Lidia estimated (and akio modified) • dAu 200GeV, Hijing with year 2008 geometry – 0.3M total events; • total reco files size = 0.5TB • fzd = 0.3TB • CPU = 8000 hours for reco, + ~50% for geant simulation; • total CPU ~ 13000 hours; • total size ~ 0.8TB; StarSoft local

  7. Approval from JetCorr-PWG Date: Mon, 28 Sep 2009 21:10:50 +0430 From: Lanny Ray <ray@physics.utexas.edu> To: Akio Ogawa <akio@rcf2.rhic.bnl.gov> Subject: Re: 2008 dAu/Hijing Simulation request HI Akio: Your simulation request is reasonable and I approve it. Lanny StarSoft local

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