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HES-HKS & KaoS meetin g. Toshi Gogami 8Nov2013. 11/2 @ 秋保大滝. Contents. Virtual photon flux Collimator position HES-HKS momentum matching Blind analysis. HES collimator. Seed : virtual photon associated. Virtual photon flux . Γ’ = 2.81E -5 +- 0.04E -5 [ /electron] . - PowerPoint PPT Presentation
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HES-HKS & KaoS meetingToshi Gogami
8Nov2013
11/2 @ 秋保大滝
Contents
• Virtual photon flux– Collimator position– HES-HKS momentum matching
• Blind analysis
HES collimator
Seed : virtual photon associated
Virtual photon flux
Γ’ = 2.81E-5 +- 0.04E-5 [ /electron]
Γ’ = 4.33E-5 +- 0.05E-5 [ /electron]
Collimator position-7.7 cm
12C データは -7.7cm で取っていると思っていた が、
Hall-C logbook
User name kohlmLog entry time 10:45:17 on October 05, 2009Entry number 188508Followups:188532 10/05/09 13:27 Nue We changed collomator position to recover high P coin events in HESkeyword=HES collimator position change
Changed HES collimator position (~3cm down), after run 76072
From EPICS information
75813HES SS=-330mm75814HES SS=-330mm75815HES SS=-330mm75816HES SS=-330mm75817HES SS=-330mm・・・・
・・・76072HES SS=-330mm76073HES SS=-300.2mm76074HES SS=-330mm ?76075HES SS=-300.2mm76076HES SS=-300.2mm・・・
-7.7 cm
-4.7 cm
HES HKS matching
HES HKS matching
Σ0 Λ
12ΛB g.s. 52
ΛV g.s.
Different momentum region different angular region
Blind analysis(Σ0入れました )
1. Distorted2. Momentum tune [5 iteration, 5 loop]3. Momentum (0th ) + angle [5 iteration, 1loop]
Missing masses Λ
1
2
3
Momentum
1
2
3
x’ and y’
1
2
3
Summary
• Virtual photon flux – Collimator position , matching
• Blind analysis– In progress
Outlook• Matrix tuning– A=52
• Formation cross section– ひとまず出す (次回 )
• Binding energy– Fitting (12
ΛB, 10ΛB, 7
ΛLi 次回 )
• Blind analysis– Matrix distortion– Seed generation
• Hypernuclei• Background
• Radiation tail – Ask Miss. Fujita
Backup
HES acceptance