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Single electrons UPC pileup

Single electrons UPC pileup. Evaluation of the UPC electron contribution to the pileup. Input is the Pt of electrons in 0<Pt<0.5 from Y. Gorbunov . dump the number of bin ontent (= number of electrons ) per bin in a . dat file.

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Single electrons UPC pileup

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  1. Single electrons UPC pileup • Evaluation of the UPC electron contribution to the pileup. • Input is the Pt of electrons in 0<Pt<0.5 from Y. Gorbunov. • dump the number of bin ontent(= number of electrons ) per bin in a .dat file. • Use the .dat file as input for starsim (upgr15 geometry) where 1 electron / event is thrown (flat in |y|<1, σVz = 20cm) HFT-soft

  2. Pt input Tracks with no pixel hits remove # of hits in layer1,2 Effective Pt divide Excess in hits HFT-soft

  3. # of hits in inner layer vs. PT of associated tracks input # of hits in outer layer vs. PT of associated tracks Pt of tracks with no pixel hits HFT-soft

  4. HFT-soft

  5. comments • Contribution at very low Pt (<.1) of extra hits due to UPC electrons is not negligible • For higher Pt, we found back a ratio ~1, meaning 1 track leaves 1 hit in each layer. • To do : simulations with rapidity |y|<5 because even for vertex ~30cm, UPC electrons can hit the PXL detector. HFT-soft

  6. Zoomed in 0 < Pt < 0.1 HFT-soft

  7. “Loopers” in TPC HFT-soft

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