D mass sideband subtraction                                                                        Kenji Hamano

Last modified : Mar 24, 2008                                              Back to Home Back to privious page

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D mass plots with new binning
OnPeak (D0)
1st cosBY bin
2nd cosBY bin
3rd cosBY bin
OnPeak (D+)
1st cosBY bin
2nd cosBY bin
3rd cosBY bin

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D mass sideband subtraction
Fit Dmass plot with
2 Gaussian + linear backgroud (D0),
2 Gaussian + linear backgroud (D+),
2 Gaussian + quadratic backgroud (D0)
2 Gaussian + quadratic backgroud (D+)

Fit results
Fit D mass plots with 2 Gaussian (Signal+Peaking Bkgd) + polynomial (Combinatrial Bkgd) and count candidates under peak.
Constraints : The mean of 2 Gaussians is set to be the same; the width of one Gaussian is 1.9 times of the other (this gives the lowest chi2)
Compare two cases : Polynomial = linear, Polynomial = quadratic

D0	Linear	Quadratic
Signal + Peaking Bkgd	719.85	719.09
Combinatrial Bkgd	693.88	694.693

D+	Linear	Quadratic
Signal + Peaking Bkgd	450.26	448.56
Combinatrial Bkgd	2602.74	2604.66

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D mass plot in bins of (p_lep, p_D, cosBY)
Plots are from top to bottom : low D momentum to high D momentum
from left to right : negative cosBY to positive cosBY
No plot means theare is no entry in the bin.

OnPeak - OffPeak (D0)
1st lepton momentum bin
2nd lepton momentum bin
3rd lepton momentum bin
4th lepton momentum bin
5th lepton momentum bin
6th lepton momentum bin
7th lepton momentum bin

OnPeak - OffPeak (D+)
1st lepton momentum bin
2nd lepton momentum bin
3rd lepton momentum bin
4th lepton momentum bin
5th lepton momentum bin
6th lepton momentum bin
7th lepton momentum bin


BBbar MC (D0)
1st lepton momentum bin
2nd lepton momentum bin
3rd lepton momentum bin
4th lepton momentum bin
5th lepton momentum bin
6th lepton momentum bin
7th lepton momentum bin

BBbar MC (D+)
1st lepton momentum bin
2nd lepton momentum bin
3rd lepton momentum bin
4th lepton momentum bin
5th lepton momentum bin
6th lepton momentum bin
7th lepton momentum bin

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OnPeak (D0)
1st lepton momentum bin
2nd lepton momentum bin
3rd lepton momentum bin
4th lepton momentum bin
5th lepton momentum bin
6th lepton momentum bin
7th lepton momentum bin

OnPeak (D+)
1st lepton momentum bin
2nd lepton momentum bin
3rd lepton momentum bin
4th lepton momentum bin
5th lepton momentum bin
6th lepton momentum bin
7th lepton momentum bin


OffPeak (D0)
1st lepton momentum bin
2nd lepton momentum bin
3rd lepton momentum bin
4th lepton momentum bin
5th lepton momentum bin
6th lepton momentum bin
7th lepton momentum bin

OffPeak (D+)
1st lepton momentum bin
2nd lepton momentum bin
3rd lepton momentum bin
4th lepton momentum bin
5th lepton momentum bin
6th lepton momentum bin
7th lepton momentum bin


BBbar MC Comb background (D0)
1st lepton momentum bin
2nd lepton momentum bin
3rd lepton momentum bin
4th lepton momentum bin
5th lepton momentum bin
6th lepton momentum bin
7th lepton momentum bin

BBbar MC Comb background (D+)
1st lepton momentum bin
2nd lepton momentum bin
3rd lepton momentum bin
4th lepton momentum bin
5th lepton momentum bin
6th lepton momentum bin
7th lepton momentum bin



Combinatorial background plots
plots are here

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OnPeak (D0) finer binning
1st lepton momentum bin
2nd lepton momentum bin
3rd lepton momentum bin
4th lepton momentum bin
5th lepton momentum bin
6th lepton momentum bin
7th lepton momentum bin

OnPeak (D+) finer binning
1st lepton momentum bin
2nd lepton momentum bin
3rd lepton momentum bin
4th lepton momentum bin
5th lepton momentum bin
6th lepton momentum bin
7th lepton momentum bin <

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