yu zeng duke university
DESCRIPTION
Yu Zeng Duke University. J/psi p-scale update (hitSigScaleFactor=1.0518, materialScale=1.045 + new vector files + good run list + shrink template range (-0.0025,-0.0005,500) ) . B-field study (16 cott bins): before correction. - PowerPoint PPT PresentationTRANSCRIPT
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June 5, 2009 W Mass and Width Meeting 1
J/psi p-scale update(hitSigScaleFactor=1.0518, materialScale=1.045
+ new vector files + good run list + shrink template range (-0.0025,-0.0005,500))
Yu Zeng
Duke University
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June 5, 2009 W Mass and Width Meeting 2
P-scale vs. cot for |dcot
- apply quadratic correction; 16 cot bins; new template (-0.0025,-0.0005,500) - 200/pb: CotCorr = 1 – (0.00010 * cot – 0.00032 * cot * cot)
B-field study (16 cott bins): before correction
Before correction Before correction
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June 5, 2009 3
P-scale vs. cot for |dcot
- Apply quadratic correction; 16 cot bins; new template (-0.0025,-0.0005,500) - A bug found: Previously cotThetaCorr only applied to mu+; now fixed - 200/pb: CotCorr = 1 – (0.00010 * cot – 0.00032 * cot * cot) - step 1: CotCorr = 1 – (0.00016 * cot – 0.00032 * cot * cot)
B-field study (16 cott bins): after correction
After correction After correction
p (after vs. before) : 8.4*10^-5; about 6.72 MeV on Mw. Consistent with 200/pb: p = 0.10*10^-3
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June 5, 2009 W Mass and Width Meeting 4
Vary fit windows 20% larger/smaller
- default fitWindowRange: (0.13, 0.13, 0.12, 0.12, 0.11, 0.11, 0.11, 0.11, 0.10, 0.10, 0.09, 0.09, 0.09, 0.09, 0.08)
- new fitWindowRange = 1.2 * default; 0.8 * default
Fitting window systematics
default fit window fit window 20% larger
p=1*10^-6; about 0.1 MeV on Mw
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June 5, 2009 W Mass and Width Meeting 5
Vary fit windows 20% larger/smaller
- default fitWindowRange: (0.13, 0.13, 0.12, 0.12, 0.11, 0.11, 0.11, 0.11, 0.10, 0.10, 0.09, 0.09, 0.09, 0.09, 0.08)
- new fitWindowRange = 1.2 * default; 0.8 * default
Fitting window systematics
default fit window fit window 20% smaller
p=6*10^-6; about 0.5 MeV on Mw
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June 5, 2009 W Mass and Width Meeting 6
pT>2.2 GeV → pT>2.4 GeV
- bkg retuned. - now only 13 points on pscale vs. curv
Kinematic cut systematics
Default (pT>2.2 GeV) pT>2.4 GeV
p= 4*10^-6; about 0.3 MeV on Mw
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June 5, 2009 W Mass and Width Meeting 7
Change bkg from linear to const (still working on this)
Background systematics
default (with sloping bkg) With const bkg
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June 5, 2009 W Mass and Width Meeting 8
Backup slides ... (for pT>2.4 GeV)
pT>2.4 GeV
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June 5, 2009 W Mass and Width Meeting 9
Curv bin 1 ~ 2
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June 5, 2009 W Mass and Width Meeting 10
Curv bin 3 ~ 4
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June 5, 2009 W Mass and Width Meeting 11
Curv bin 5 ~ 6
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June 5, 2009 W Mass and Width Meeting 12
Curv bin 7 ~ 8
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June 5, 2009 W Mass and Width Meeting 13
Curv bin 9 ~ 10
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June 5, 2009 W Mass and Width Meeting 14
Curv bin 11 ~ 12
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June 5, 2009 W Mass and Width Meeting 15
Curv bin 13