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EMC + EMC lvl1 Trigger Performance in RUN 02

EMC + EMC lvl1 Trigger Performance in RUN 02. From Sasha Bazilevsky. Minimum bias High pt trigger. Matthias Grosse Perdekamp. May 22, 2002. Spin PWG Physics Goals from Run 02 Data. From Naohito Saito. Measure single spin asymmetries for identified particles.

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EMC + EMC lvl1 Trigger Performance in RUN 02

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  1. EMC + EMC lvl1 Trigger Performance in RUN 02 From Sasha Bazilevsky Minimum bias High pt trigger Matthias Grosse Perdekamp May 22, 2002

  2. Spin PWG Physics Goals from Run 02 Data From Naohito Saito Measure single spin asymmetries for identified particles Test to which level NLO QCD describes inclusive hadron spectra

  3. Rates for run 03 Peak luminosity: 1.6x1031cm-2s-1 ==> Peak Rates into Level 1 500kHz Bandwidth into Event builder/DCM ==> 5kHz (?) Need rejection of about 500 at level 1: Thresholds between 2-3 GeV Integrated Luminosity from RHIC==> 2.8pb-1/week Integrated Luminosity with PHENIX up ==> 1.0pb-1/week Write 3x109 events corresponding to 120 days of production on CCJ

  4. W. Vogelsang and M. Stratmann qq gq gg

  5. Y. Goto

  6. W. Vogelsang Evidence that pQCD fits data for colliders down to pT=2 GeV. This can be further studied using RHIC pp data from runs 02 (and 03). Charged and neutral pion spectra are sensitive to the Gluon Polarization. Input distributions: o Differences in the fragmentation functions will largely cancel in the asymmetry. o Variations in the unpolarized parton distributions have little effect on the asymmetry. o Significant experimental input: pdfs: SLAC, CERN-M2, HERA, ffs: EMC, LEP, HERMES

  7. Summary o 5 weeks of spin commissioning o 3 weeks of physics with longitudinal polarization Measurement of gluon polarization in inclusive hadron production Operate PHENIX at 10 times higher luminosity o Physics run should be contingent on demonstrated PAGS>40%

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