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Rough estimate of raw Yields of omega(phi) for run3 and beyond

Rough estimate of raw Yields of omega(phi) for run3 and beyond. Richard Seto UCR Light/Heavy PWG Aug 14, 2003. 0.6<p/E<1.5 N0>=2. 0.8<p/E<1.5 N0>=3. Run 3 dAu – Pro.39 ee spectrum 5Mev/bin. Events/5MeV. Events/5MeV. ee invariant Mass(GeV). ee invariant Mass(GeV).

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Rough estimate of raw Yields of omega(phi) for run3 and beyond

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  1. Rough estimate of raw Yields of omega(phi) for run3 and beyond Richard Seto UCR Light/Heavy PWG Aug 14, 2003

  2. 0.6<p/E<1.5 N0>=2 0.8<p/E<1.5 N0>=3 Run 3 dAu – Pro.39ee spectrum 5Mev/bin Events/5MeV Events/5MeV ee invariant Mass(GeV) ee invariant Mass(GeV)

  3. Fit in 2.5 Mev binsRBW*Gaussian+2 deg polynomial • ~43 events chisq=81/73 • M=772.30.9 = 94 = 04 (all in MeV) • I have now done a mixed bkg subtraction - same results (will show next time) Events/2.5MeV Events/2.5MeV ee invariant Mass(GeV) ee invariant Mass(GeV)

  4. Run –3 dA • Total run • IntLum~2.6/nb • 7.4E9 bbc llv1 raw • 1.3e8 bbc llv1 recorded • 1.4e9 ERT 2x2 & bbcll1 raw • 1.2e7 ERT 2x2 & bbcll1 recorded • Pro.39 • IntLum~? • 6.1e8 • 0.95e7 • 1.4e8 • 2.0e6 • Database extracted to text files (pi0 folks) • Most of events came in under ERT trigger • Looked at number of triggers in dA – pro.39 Pro.39 ~ 10% of data

  5. Rates • ~ assume 40 omegas, ~15 phi’s • SO we might get 400 omega, 150 phi’s for 2.5/nb in dA min bias • dA Npart~ 7 • Au-Au min bias npart ~ 109 (factor 15) • Run-4 Au-Au 19wks (intL=169 ub-1) • ~1300 omegas, 470 phi’s • 3 cent bins *4 pt bins ~ 100 per bin

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