chorus physics workshop, 7 june 2004, rome luca scotto lavina kinematical selection and fc analysis...
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CHORUS Physics Workshop, 7 June 2004, Rome
Luca Scotto Lavina
Kinematical selection and FC analysis for oscillations
Montecarlo chain used for 0mu channel
Events generated in emulsion
Loca
tion
pro
gra
m
Selected eventsSato
Mu
rat
an
d
Gold
en
sele
ctio
n
Stopped in bulk
• PRDC recontruction,• CS, SS and bulk scanback• [4,35] fiducial volume cut• 1.0 cm fiducial volume border
cut
No spec muon in PRTK
First 0mu definitionFor each track in PRVTPRTK:1) read MUON-ID = q(JSMTR+3) =
= q(JMUTR+3)2) If MUON-ID>0, the track is a
spectrometer muonIf there is no muon, the event is
0mu
Production of .man files and charm.kin file
1.5 cm fiducial volume border cut
Events in 0mu.listSecond 0mu definition
Based on MURECO flg_mu<4, IP cut respect to vertex, 2 cut
This definition includes the first one
SatoMurat: SatoMurat_mc-ver04.cpp Selection: goldenMC-0mu-04-02-02.awk
EMUL 7131
In bulk 2777
Spec 0mu 209
.man files 201
0mu.list 117
Selected 23
7131 events generated in emulsion with
Location efficiency + 0mu request =0mu.lis
t
EMUL= (1.65 ± 0.15) %
Selection efficiency =Selected
0mu.list= (20.2 ± 3.7) %
D+, Ds, c 1 prong
MC charm 0mu, 1 prong
0mu request = 0mu.lis
t
In bulk
· 1.043 = 4.4%
Spec 0mu
In bulk
= 7.5%
If I consider only the first 0mu definition, based only on spectrometer muons:
1.043 = 1.0 cm f.v. border
cut
1.5 cm f.v. border cut
(Full statistics)
EMUL 9078
In bulk 3585
Spec 0mu 410
.man files 384
0mu.list 197
Selected 100
9078 events generated in emulsion with
Location efficiency + 0mu request =0mu.lis
t
EMUL= (2.18 ± 0.15) %
Selection efficiency =Selected
0mu.list= (50.8 ± 3.5) %
D+, Ds, c 3 prong
MC charm 0mu, 3 prong
0mu request = 0mu.lis
t
In bulk
· 1.043 = 5.7%
Spec 0mu
In bulk
= 11.4%
If I consider only the first 0mu definition, based only on spectrometer muons:
1.043 = 1.0 cm f.v. border
cut
1.5 cm f.v. border cut
(Full statistics)
EMUL 6831
In bulk 1479
Spec 0mu 1393
.man files 1322
0mu.list 875
Selected 209
6831 events generated in emulsion with
Location efficiency + 0mu request =0mu.lis
t
EMUL= (12.8 ± 0.4) %
Selection efficiency =Selected
0mu.list= (23.9 ± 1.4) %
e,h
MC e,h
0mu request = 0mu.lis
t
In bulk
· 1.043 = 61.7%
Spec 0mu
In bulk
= 94.2%
If I consider only the first 0mu definition, based only on spectrometer muons:
1.043 = 1.0 cm f.v. border
cut
1.5 cm f.v. border cut
EMUL 1552
In bulk 418
Spec 0mu 394
.man files 367
0mu.list 272
Selected 143
1552 events generated in emulsion with
Location efficiency + 0mu request =0mu.lis
t
EMUL= (17.6 ± 1.0) %
Selection efficiency =Selected
0mu.list= (52.6 ± 3.0) %
3h
MC 3h
0mu request = 0mu.lis
t
In bulk
· 1.043 = 67.9%
Spec 0mu
In bulk
= 94.3%
If I consider only the first 0mu definition, based only on spectrometer muons:
1.043 = 1.0 cm f.v. border
cut
1.5 cm f.v. border cut
EMUL 1765
In bulk 636
Spec 0mu 107
.man files 99
0mu.list 74
Selected 18
1765 events generated in emulsion with
Location efficiency + 0mu request =0mu.lis
t
EMUL= (4.2 ± 0.5) %
Selection efficiency =Selected
0mu.list= (25.0 ± 4.9) %
MC
0mu request = 0mu.lis
t
In bulk
· 1.043 = 12.1%
Spec 0mu
In bulk
= 16.8%
If I consider only the first 0mu definition, based only on spectrometer muons:
1.043 = 1.0 cm f.v. border
cut
1.5 cm f.v. border cut
EMUL 2233
In bulk 938
Spec 1mu 845
.man files 840
CC.list 771
2233 events generated in emulsion with
Location efficiency + 1mu request =CC.list
EMUL= (34.5 ± 1.0) %
CC
MC CC
1mu request = CC.list
In bulk· 1.043 = 85.7%
Spec 1mu
In bulk
= 90.1%
If I consider only the first 1mu definition, based only on spectrometer muons:
1.043 = 1.0 cm f.v. border
cut
1.5 cm f.v. border cut
Summary of efficiencies
Charm 0mu 1 prong
Charm 0mu 3 prong
e,h 3h
Location eff.+ 0mu request
1.65 ± 0.15
2.18 ± 0.15
12.8 ± 0.4 17.6 ± 1.0 4.2 ± 0.5
Selection efficiency
20.2 ± 3.7 50.8 ± 3.5 23.9 ± 1.4 52.6 ± 3.0 25.0 ± 4.9
numuCC
Location eff.+ 1mu request
34.5 ± 1.0
Nmax(e,h) expected events
Nmax(e,h) = N0 loc · r · rA · BR(e,h) · sel
N0 loc = 23678
r =
CC
NC
CC
CC
CC
NC
= · = 0.53/0.31 = 1.71
rA = A
0
ANC 0
= 1.06 ± 0.07
BR(e,h) = 0.673
Nmax(e,h) = 6903sel = (23.9 ± 1.4)%
Nmax(3h) expected events
Nmax(3h) = N0 loc · r · rA · BR(3h) · sel
N0 loc = 23678
r =
CC
NC
CC
CC
CC
NC
= · = 0.53/0.31 = 1.71
rA = A
0
ANC 0
= 1.20 ± 0.12
BR(3h) = 0.152
Nmax(3h) = 3884sel = (52.6 ± 3.0)%
Nmax() expected events
Nmax() = N0 loc · r · rA · BR() · sel
N0 loc = 23678
r =
CC
NC
CC
CC
CC
NC
= · = 0.53/0.31 = 1.71
rA = A
0
ANC 0
= 0.35 ± 0.09
BR() = 0.174
Nmax() = 616sel = (25.0 ± 4.9)%
Background: NcharmC1 0 expected events
NcharmC1 0 = N1 loc · r · rA · BR(DC1) · sel
N1 loc = 95450
r =
charm+
CC
= 0.03
rA = A
charm 0
ACC 1
= 0.048 ± 0.006
BR(DC1) = 0.65
NcharmC1 0 = 18sel = (20.2 ± 3.7)%
Background: NcharmC3 0 expected events
NcharmC3 0 = N1 loc · r · rA · BR(DC1) · sel
N1 loc = 95450
r =
charm+
CC
= 0.03
rA = A
charm 0
ACC 1
= 0.063 ± 0.006
BR(DC1) = 0.35
sel = (50.8 ± 3.5)%
NcharmC1 0 = 32
Background: NWSK 1prong expected events
NWSK 1prong =
N0 loc = 23678
sel =
NWSK 1prong = 6.0
N0 loc
ANC 0
· sel
ANC 0 = 0.142
= 3.60 · 10-5wi
selected
NWSK generated in emulsion
Using WHINTER=0.720
19973
Signal and background expected without post-scanning cuts
BG: charm BG: WSK BG: Total Nmax
Old 1 0.1 - 0.1 5014
0 + 1prong 18 6 24 7519
0 + 3prong 32 0 32 3884
Using Feldman & Cousins (NOMAD) approach we obtain:
Sensitivity (zero events observed): P < 2.8 · 10-4
of the signal
= angle between parent particle and the mean of all primary tracks
c = angle between parent particle and the mean of all primary tracks, but the mean is done without the most far track from the parent
c
D
of the BG
= angle between parent particle and the mean of all primary tracks
c = angle between parent particle and the mean of all primary tracks, but the mean is done without the most far track from the parent
D
c cut
c > 1.8 rad
BG reduced to 15%
Tau reduced to 70%
Signal and background expected applying c cut
BG: TotalObserved (assumed)
Nmax
Old 1 0.1 0 5014
0 + 1prong 3.6 4 5263
0 + 3prong 4.8 5 2719
Using Feldman & Cousins (NOMAD) approach we obtain:
Sensitivity (zero events observed): P < 2.7 · 10-4
Oscillation limit: P < 2.9 · 10-4