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Thin-thick DCA

Thin-thick DCA. Files used : Rectree: /star/u/yfzhang/lbl/hft/upgr15/cd1/production/thin/particle/ntuple/out/ 20 D0, 30 Ds /evt with power-law pt, 30 Lc /evt with flat pt (fz) + Hijing AuAu Central fz DCA XY and Z reconstructed using StPhysicalHelixD

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Thin-thick DCA

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  1. Thin-thick DCA • Files used : • Rectree: • /star/u/yfzhang/lbl/hft/upgr15/cd1/production/thin/particle/ntuple/out/ • 20 D0, 30 Ds /evt with power-law pt, 30 Lc /evt with flat pt (fz) + Hijing AuAu Central fz • DCA XY and Z reconstructed using StPhysicalHelixD • Reconstructed DCA of particles (K,pi,P) are matched with their geant_id = “perfect id” • Cuts : Pixel hits requirement =2 ; TPC hits reco. > 15 CD2/3 DCA : thin/thick

  2. Pointing resolution in r/phi CD2/3 DCA : thin/thick

  3. Pointing resolution in Z CD2/3 DCA : thin/thick

  4. note • We reached an agreement btw data and hand calculations of Jim Thomas when the “log” term wasn’t used in the MCS definition CD2/3 DCA : thin/thick

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