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from ATL-PHYS-2004-006. Layout changes. from ATL-PHYS-2004-006. from ATL-PHYS-2004-006. from ATL-PHYS-2004-006. fig.9 Impact parameter の正負の定義. from ATL-PHYS-2004-006. 2D b-tagging algorithm: 各 track に transverse impact の weight をつけて b である確率 wi を計算し

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Layout changes

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  1. from ATL-PHYS-2004-006 Layout changes

  2. from ATL-PHYS-2004-006 from ATL-PHYS-2004-006

  3. from ATL-PHYS-2004-006 fig.9 Impact parameterの正負の定義

  4. from ATL-PHYS-2004-006 • 2D b-tagging algorithm: • 各trackにtransverse impactのweightをつけてbである確率wiを計算し • good trackのlog(wi)和を計算してjet weightする。

  5. from ATL-PHYS-2004-006 (2) 3D b-tagging: z 方向もlikelyhoodの計算に入れる。 (3) SV method : 2ndary vertexがjet中に存在するか見つける。Energy, paticle数、 invariant massなどの情報を入れる。 WH eventによるlight quark Jet rejection power計算 at e(b)=50%

  6. from ATL-PHYS-2004-006 • TDR geometryに比べDC1は • Rとmassの増加でX0.5 • 2nd layer staging-- x0.7 • Pileup, ineff, align - x0.75 • 300mm->400mm ---x0.9 とかなりdegrade • xKalmanなどaligorithmでx1.8 • 3D b-taggingx1.9 • Secondary vertex methodx2.8 この結果 150 @e(b)=60%が得られた。TDRの100@60%より良い。

  7. from ATL-PHYS-2004-006

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