B- to D0 (K pi) K*-
Current status
MC ntuple production: Raja
The
DaVinci file used to produce the ntuples you are running over are attached to this page at the links below.
Please note the following :
1. The files have the additional extension ".txt" added by the wiki software for safety reasons.
2. These are the latest files with a few added variables. Some of these variables (nLong, <particle>_eta, ...) are currently missing in the ntuples. They will be added in due course.
ntuple
ntuple is stored at /opt/ppd/lhcb/tbird/ntuples/B2DKstar/data/B2DKstar_str09.root
cuts
Using Almost exactly same cuts as
B2Dpi, except cuts applied to daughters of the D were also applied to the daughters of the K* and a mess cut was applied to the K* too, with a window of 150
MeV.
The names were defined for the
B2Dpi decay so are not as useful as they are for that decay
#define Name_Of_Cuts "thomas mod - low mv and dipchi2"
#define Negative_D_Daughter_PT_Cut 300
#define Positive_D_Daughter_PT_Cut 300
#define Negative_D_Daughter_MINIPCHI2_Cut 9
#define Positive_D_Daughter_MINIPCHI2_Cut 9
#define Negative_D_Daughter_P_Cut 2000
#define Positive_D_Daughter_P_Cut 2000
#define Negative_D_Daughter_TRACK_CHI2NDOF_Cut 8
#define Positive_D_Daughter_TRACK_CHI2NDOF_Cut 8
#define Bachelor_PT_Cut 300
#define Bachelor_MINIPCHI2_Cut 9
#define Bachelor_P_Cut 2000
#define Bachelor_TRACK_CHI2NDOF_Cut 8
#define Bachelor_PIDK_Cut 100000
#define D_FDCHI2_OWNPV_Cut 100
#define Z_Dist_Cut -1
#define D_ENDVERTEX_CHI2_D_ENDVERTEX_NDOF_Cut 15
#define D_IPCHI2_OWNPV_Cut 9
#define D_PT_Cut 2000
#define B_FDCHI2_OWNPV_Cut 64
#define B_ENDVERTEX_CHI2_B_ENDVERTEX_NDOF_Cut 10
#define B_IPCHI2_OWNPV_Cut 16
#define B_DIRA_OWNPV_Cut 0.9999
#define Negative_D_Daughter_PIDK_211_Cut 10
#define Positive_D_Daughter_PIDK_211_Cut 10
#define Positive_D_Daughter_PIDK_321_Cut 10
#define Negative_D_Daughter_PIDK_321_Cut 10
#define D_M_Window_Cut 21
#define B_M_Window_Cut 50
these are saved in /home/hep/uoh35620/stuff/analyse-n-tuple/cuts/thomas.low.dip.cuts.h
this is a version of /home/hep/uoh35620/stuff/analyse-n-tuple/cuts/thomas.low.mv.cuts.h where the D IP Chi^2 has been loosened, when it was a bit tighter the monte carlo efficiency was as follows
Cut info:
0 tot lumi : -5.00e+12 nb-1 +/- 5.00e+12 nb-1
0 tot cands : 153263
1 evt bfr cut: 16662
2 D daughter : 13075 78.47% +/- 0.32%
3 bachelor : 9759 74.64% +/- 0.38%
4 after D cut: 6700 68.65% +/- 0.47%
5 after B cut: 6134 91.55% +/- 0.34%
6 after PID : 4300 70.10% +/- 0.58%
7 nPV : 4300 100.00% +/- 0.00%
8 event num : 4300 100.00% +/- 0.00%
9 D mass : 4024 93.58% +/- 0.37%
9 B mass : 3868 96.12% +/- 0.30%
Overall Eff: 23.21% +/- 0.33%
analysis script
Run it with the g++root command defined
HowToCompileRootMacros it took ~15 hours to run with 577/nb of data, so run it on heplnx112 not 108 as 108 is slow.
plots
raw plots can be found in /opt/ppd/lhcb/tbird/analysis/b2dkstar/* for mc and data. the name of the cuts used is specified in the
KstarAnalysis file and the output file, both near the top.
--
ThomasBird - 2010-09-07