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Njet unfolding

This work focuses on the systematic unfolding processes for W+jet and WGamma in high-energy physics. We detail the setup of unfolding ntuples, background normalization, and the handling of shape systematics, including photon ID efficiency and jet energy scale uncertainties. The analysis compares different anti-tight definitions, investigating their impacts on shape comparisons and uncertainties in signal measurements. We also perform unfolding on WGamma mass and conduct closure tests to validate our methodologies, ensuring robustness in high-energy analyses.

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Njet unfolding

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  1. Njet unfolding Zhijun Liang

  2. Introduction • Njet unfolding share the same • unfolding ntuples setup • background normalization • Additional systematics on the shape.

  3. W+jet shape systematics • Shape systematics are taken from control regions in data • Compare W+jet shape with different anti-tight definition. Feng’s anti tight defintion Zhijun’s anti tight defintion Anti tight in 1fb-1 analysis Njet

  4. WgammaNjet, pT>15GeV

  5. Signal uncertainty Main systematics is photon ID efficiency uncertainty and JES/JER systematics Larger uncertainty in overflow bin

  6. WgammaNjet, pT>60GeV

  7. Unfolding on Wgamma mass

  8. Wgamma mass unfolding MC closeure test

  9. Wgamma mass unfolding signal systematics

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