jet en corrections vs jet energy
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jet en corrections vs jet energy P.Azzurri – WWTF 21/04/04
description
jet en corrections vs jet energy. P.Azzurri – WWTF 21 /04/04. two jet corrections @Zpeak. Z peak jet corrections: ~1.00 for |cos( θ )|0.7. two jet corrections @Zpeak. data/MC ratio of averages of E jet /E beam in the [0-2] window. two jet corrections @LEP2. - PowerPoint PPT Presentation
Transcript of jet en corrections vs jet energy
jet en corrections vsjet energy
P.Azzurri – WWTF 21/04/04
jet corr en dependence 2P.Azzurri WWTF 21/04/04
two jet corrections @Zpeak
Z peak jet corrections:
~1.00 for |cos(θ)|<0.7
1.00-1.02 for |cos(θ)|>0.7
jet corr en dependence 3P.Azzurri WWTF 21/04/04
two jet corrections @Zpeak
data/MC |cos(θ)|<0.7 |cos(θ)|>0.7
1994 1.0008(2) 1.0087(3)
1998 1.0001(7) 1.0100(12)
1999 1.0018(6) 1.0113(11)
2000 1.0028(6) 1.0109(10)
LEP2 1.0016(4) 1.0107(6)
08.09925.0
50.0
16
Thrust
sM
CLAS
vis
data/MC ratio of averages of Ejet/Ebeam in the [0-2] window
jet corr en dependence 4P.Azzurri WWTF 21/04/04
two jet corrections @LEP2
data/MC |cos(θ)|<0.7 |cos(θ)|>0.7
130 0.993(15) 0.995(15)
136 0.990(12) 1.015(20)
average 0.991(9) 0.998(12)
183 0.995(5) 1.000(7)
189 1.000(3) 1.005(4)
08.09925.0
75.0
16
Thrust
sM
CLAS
vis
data/MC ratio of averages of Ejet/Ebeam in the [0-2] window
jet corr en dependence 5P.Azzurri WWTF 21/04/04
Selection of three jet events @Z peak
91.2 GeV
0.4))min(sin(
: separationangular jet three
1.0 75.0
:rseigenvecto tensor Momentum
01.0)(10log 85.0
5.0 16
ij
3221
23
tttt
yThrust
sMCLAS vis
Selects jets with E=25±7 GeV
jet corr en dependence 6P.Azzurri WWTF 21/04/04
Selection of three jet events @Z peak
Jet 1
Jet 3Jet 2
2
1
3
sc
cEc
EEEPPP
i
ii
i
ii
sin
sinsinsin
sinsinsin 3
33
2
22
1
11
3
3
2
2
1
1
Instead of Ebeam :
jet corr en dependence 7P.Azzurri WWTF 21/04/04
three jet corrections @Z peak
data/MC |cos(θ)|<0.7 |cos(θ)|>0.7
1994 0.9977(06) 1.0033(14)
1998 0.9945(25) 0.9983(50)
1999 0.9971(24) 1.0092(48)
2000 1.0034(22) 1.0077(45)
LEP2 0.9983(14) 1.0051(28)
data/MC ratio of averages of Ejet/Eresc in the [0-2] window
jet corr en dependence 8P.Azzurri WWTF 21/04/04
Average jet correction DATA/MC
Ejet |cos(θ)|<0.7 |cos(θ)|>0.7
25 GeV 0.9983(14) 1.0051(28)
45 GeV 1.0016(4) 1.0107(6)
65-68 GeV 0.991(9) 0.998(12)
91 GeV 0.995(5) 1.000(7)
94 GeV 1.000(3) 1.005(4)
jet corr en dependence 9P.Azzurri WWTF 21/04/04
Average jet correction DATA/MC
