FWHM

HES-HKS & KaoS meeting
Toshiyuki Gogami
7Jan2014
D論！遅らせます
Contents
• Status of spectra
• Blind analysis
• Resolution
• Response function
12C(e,e’K+)12
ΛB
+
0
p(e,e’K )Λ,Σ
from H2O target
7Li(e,e’K+)7
ΛHe
7
ΛHe
differential cross section
(FWHM ~ 1.3 MeV)
Peak
Binding energy [MeV] Cross section [nb/sr]
1
-5.28 ±0.14
12.4
2
-3.50 ±0.14
7.0
7
ΛHe
Comparison
Peak
(FWHM ~ 1.3 MeV)
Binding energy [MeV] Cross section [nb/sr]
1
-5.28 ±0.14
12.4
2
-3.50 ±0.14
7.0
ちなみに
-5.36 without CSB
-5.16 with CSB
10B(e,e’K+)10
ΛBe
10B(e,e’K+)10
ΛBe
( Width = 800 keV (FWHM) )
#1: -8.59±0.073 MeV, 13.0 nb/sr
#2: -6.09±0.10 MeV, 11.5 nb/sr
#3: -5.03±0.16 MeV, 6.6 nb/sr
#4: -2.03±0.089 MeV, 12.5 nb/sr
#5: -0.69±0.13 MeV, 9.4 nb/sr
10B(e,e’K+)10
ΛBe
( Width = 800 keV (FWHM) )
#1: -8.59±0.073 MeV, 13.0 nb/sr
#2: -6.09±0.10 MeV, 11.5 nb/sr
#3: -5.03±0.16 MeV, 6.6 nb/sr
#4: -2.03±0.089 MeV, 12.5 nb/sr
#5: -0.69±0.13 MeV, 9.4 nb/sr
ちなみに
-8.84 without CSB
-8.76 with CSB
10B(e,e’K+)10
ΛBe
ちなみに
-8.84 without CSB
-8.76 with CSB
Blind analysis
分解能ってどこまでいけるの？
良い分解能を求めたときにリニアリティは？
Tune した後のresponse functionは？
Blind analysis (initial: no distortion)
Mean
Width (FWHM)
Response function
今後
• Binding energy
• Systematic error
• Target thickness
• Energy straggling
• Tuning
• Cross section
• Systematic error
• efficiencies
•
52Cr
target
• Matrix tuning
• Blind analysis
• BG for 12ΛB
• P-shell
• 他のピーク等

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