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Jin Huang M.I.T. For Transversity Analysis Meeting Jul 02, JLab.

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Presentation on theme: "Jin Huang M.I.T. For Transversity Analysis Meeting Jul 02, JLab."— Presentation transcript:

1 Jin Huang M.I.T. For Transversity Analysis Meeting Jul 02, 2009 @ JLab

2 Transversity Analysis Meeting Jin Huang 2

3  Xin showed there are numerical scalar inconsistencies http://nedm.tunl.duke.edu/~xq2/transversity/dat a_check/ http://nedm.tunl.duke.edu/~xq2/transversity/dat a_check/  Examples: (Diff Between L&BB BCM scalar vs time) Transversity Analysis Meeting Jin Huang 3

4  Extract Slope of each plot  Plot versus run number  Four Main Categories: ◦ Helicity + VS Helicity - @ Bigbite Scalars (Asymmetry) for helicity charge asymmetry study Helicity + VS Helicity - @ Bigbite Scalars (Asymmetry) ◦ BCM x1 and x10 VS BCM x3 @ Bigbite Scalars (Ratio) to check BCM problems on/after the amplifier BCM x1 and x10 VS BCM x3 @ Bigbite Scalars (Ratio) ◦ BCM Upstream VS Downstream @ Bigbite Scalars (Asymmetry) to check BCM problems before the amplifier BCM Upstream VS Downstream @ Bigbite Scalars (Asymmetry) ◦ Bigbite Scalar VS HRS Scalars (Asymmetry) to check consistency between HRS and BigBite copy of each scalar channel Bigbite Scalar VS HRS Scalars (Asymmetry) Transversity Analysis Meeting Jin Huang 4

5  Following Link http://www.jlab.org/~jinhuang/Transversity/ ScalarConsistCheck/ http://www.jlab.org/~jinhuang/Transversity/ ScalarConsistCheck/  To Do: ◦ Check through all inconsistencies ◦ Build Problematic Run List Transversity Analysis Meeting Jin Huang 5

6 Transversity Analysis Meeting Jin Huang 6

7 Transversity Analysis Meeting Jin Huang 7  Sigma ~ 280ps

8 Transversity Analysis Meeting Jin Huang 8  Full Optimization: BB.tr.x*0.115883+BB.tr.th*-0.384280+BB.tr.ph*- 0.995076+BB.tr.y*0.468921+BB.tr.x*BB.tr.x*0.111522+BB.tr.th*BB.tr.th*0.444160+BB.tr.x*BB.tr.th*-0.489851  Sigma < 270ps

9  There is no much space to push ◦ No obvious slopes ◦ Also there is no ADC dependence (time walk has already done)  Good News: For both BB & LHRS, there are obvious tails more than Gaussian  TODO: ◦ Coding the coincidence module for replay ◦ Multi-hits; Multi-tracks: Golden track selection Transversity Analysis Meeting Jin Huang 9

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