US PtMurec and PtRec RMS for Pt=100 GeV muons N. Terentiev (Carnegie Mellon University) Fermilab Jan.11, 2005.

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Presentation transcript:

US PtMurec and PtRec RMS for Pt=100 GeV muons N. Terentiev (Carnegie Mellon University) Fermilab Jan.11, 2005

N.Terentiev Carnegie Mellon University Muon LPC meeting Fermilab Jan. 11, PtMurec and PtRec RMS Data The single muon particle gun sample, Pt=100 GeV Flat in Phi over all Phi Flat in Eta from -2.5 to 2.5 1,000 events OSCAR_3_2_2 and ORCA_8_1_3 Selection One simulated muon in GEANT block (PtGen) One reconstructed muon track (PtMurec) (Tracker and Muon Barrel / Muon Endcap) One Reconstructed track in Tracker (PtRec) Overall yield 87.4% Compare RMS for (PtMurec-PtGen) and (PtRec-PtGen)

N.Terentiev Carnegie Mellon University Muon LPC meeting Fermilab Jan. 11, PtMurec and PtRec RMS RMS=3.50(08)RMS=2.82(07)

N.Terentiev Carnegie Mellon University Muon LPC meeting Fermilab Jan. 11, PtMurec and PtRec RMS RMS=2.09(09)RMS=1.92(08)

N.Terentiev Carnegie Mellon University Muon LPC meeting Fermilab Jan. 11, PtMurec and PtRec RMS RMS=2.29(09)

N.Terentiev Carnegie Mellon University Muon LPC meeting Fermilab Jan. 11, PtMurec and PtRec RMS RMS=1.74(07) RMS=1.44(06)

N.Terentiev Carnegie Mellon University Muon LPC meeting Fermilab Jan. 11, PtMurec and PtRec RMS RMS Summary PtMurec-PtGen PtRec-PtGen Conditions 3.50(08) 2.82(07) All PGen -20 <Pt-PtGen< (09) 1.92(08) All PGen -5 <Pt-PtGen<5 2.29(09) PGen > <Pt-PtGen<5 1.74(07) 1.44(06) PGen < <Pt-PtGen<5

N.Terentiev Carnegie Mellon University Muon LPC meeting Fermilab Jan. 11, PtMurec and PtRec RMS Conclusion RMS(PtMurec-PtGen) and RMS(PtRec-PtGen) are different mainly due to tails contribution (outliers) For endcap region (PGen > 200 GeV or |EtaGen| > 1.4) RMS are close if no outliers For central region (PGen < 130 GeV or |EtaGen| < 0.8) RMS(PtMurec-PtGen) > RMS(PtRec-PtGen) even when no outliers. Why? The widths should be fitted to be compared, RMS are biased by outliers Better to compare 1/Pt (less spread, D.Acosta)