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2-nd look on J/ ψ and 1-st iteration with vertex fitter

2-nd look on J/ ψ and 1-st iteration with vertex fitter. E. Shulga NRNU “ MEPhI ”. J/ ψ Selection C uts. p μ T > 3 GeV ; At least 1 μ is tight; d0,z0 < 10; Χ2/ ndof <10; BL Hits > 0 p J / ψ T > 6 GeV. J/ ψ Peak .

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2-nd look on J/ ψ and 1-st iteration with vertex fitter

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  1. 2-nd look on J/ψand 1-st iteration with vertex fitter E. Shulga NRNU “MEPhI”

  2. J/ψ SelectionCuts • pμT > 3 GeV; • At least 1 μ is tight; • d0,z0 < 10; • Χ2/ndof<10; • BL Hits > 0 • pJ/ψT> 6 GeV

  3. J/ψ Peak • For vertex finding Tracking/TrkVertexFitter/TrkVKalVrtCore was used, and this is the first reasonable iteration with this tool; • Vertex cuts will be applied

  4. Summary & Plans • Selection cuts seams to be reasonable, some improvements can be achieved taking Barrel and EndCap separately, and using MC; • Finally there is a separation of prompt/non-prompt pairs, which have to be checked more carefully; Plans: • Non-/prompt pairs have to be studied carefully ; • Start to look on MC ; • Main goal is to extract Rcp, so it will be one of the next steps; …

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