CURVATURE RECONSTRUCTION PERFORMANCE SLAC ILC Simulation Meeting September 15 2009 Alex Bogert (Undergraduate student) Bruce Schumm Question: ILD Higgs.

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Presentation transcript:

CURVATURE RECONSTRUCTION PERFORMANCE SLAC ILC Simulation Meeting September Alex Bogert (Undergraduate student) Bruce Schumm Question: ILD Higgs LOI recoil reconstruction appears somewhat better than SiD’s. Could this be due to curvature reconstruction?

CURVATURE RECONSTRUCTION PERFORMANCE 1.Compare width of Gaussian fit to residuals with two different estimates: Error from square root of appropriate diagonal error matrix element Error from Billior calculation (LCDTRK program) 2.Only tracks with all DOF (5 VTX and 5 CT layers) are considered. 3.Only gaussian smearing is used, since this is what is assumed for the two estimators. Use q/qbar at 500 and 1000 GeV, tau samples at 500 GeV, all mixed together (shouldn’t matter)

CURVATURE ERROR vs. CURVATURE LCDTRK calculation includes beam constraint Gaussian fit

Snowmass 2005 Results (RMS residual)

Most HZ tracks have all 10 DOF (but very small statistics!) Tracks from HZ events P t > 5 Gev/c |cos(  )| < 0.8