1. E05-115 Collaboration Meeting Mar10-11, 2010

2. ENGINE replay summary
2019/2/21

3. Analysis over view
2019/2/21

4. Revision summary Added new ntuple contents
Modified EDC tracking routine, parameter and geometry
Modified HDC tracking parameter and geometry
KHODO, EHODO parameter tuning
WC parameter tuning
New default matrix
2019/2/21

5. Ntuple contents summary
Add
hsbeta1y … beta between 1y and 2x
hmsq … mass square of HKS particle
haern*p(n) … AC la-* pos (neg). channel npe
hacn*p(n)m … AC la-* pos (neg). channel npe, 2hit
hact*p(n) … AC la-* pos (neg). channel time
hact*p(n)m … AC la-* pos (neg). channel time, 2hit
hwatn*p(n) … WC la-* pos (neg). channel npe
hwcn*p(n)m … WC la-* pos (neg). channel npe, 2hit
hwct*p(n) … WC la-* pos (neg). channel time
hwct*p(n)m … WC la-* pos (neg). channel time, 2hit
hwatnkn* … WC la-* kaon normalized npe
Modified
bpm3c*x(y) … BPM value in ADC
hmsq (GeV/c2)
bpm3c12, y (cm) : x (cm)
2019/2/21

6. HTRACKING KHODO Analysis Select proper ADC, TDC hit information
KDC Analysis
Calculate the number of tracks
Calculate FP value
Tracking w/ KDC and KHODO
Select Good track
Check Very close tracks
Momentum Reconstruction
For beta calculation
modified
TOF calculation
Reject strange beta
modified
AC, WC, LC calculation
Select proper hit, Calc NPE
Hit Selection, Physics
Select hits on the track
2019/2/21

7. ETRACKING EHODO Analysis Select proper ADC, TDC hit information
EDC Analysis
modified
Tracking w/ EDC1 and EHODO
Define the number of tracks in HES
modified
Select Good track
Check Very close tracks
modified
Tracking w/ EDC2
Fine tracking w/ EDC2, calc FP variables
Momentum Reconstruction
For beta calculation
Hit Selection, Physics
Select hits on the track
2019/2/21

8. multiplicity -KDC
CH2 Run
CH2 Run
52Cr Run
52Cr Run
2019/2/21

9. CH2 Run CH2 Run CH2 Run 52Cr Run 52Cr Run 52Cr Run multiplicity -KHODO
2019/2/21

10. multiplicity –AC,WC
CH2 Run
CH2 Run
52Cr Run
52Cr Run
2019/2/21

11. multiplicity –EDC
CH2 Run
CH2 Run
52Cr Run
52Cr Run
2019/2/21

12. multiplicity –EHODO
CH2 Run
CH2 Run
52Cr Run
52Cr Run
2019/2/21

13. KTOF resolution
parameter tune … Nagao
ELOG Message ID 566
2019/2/21

14. ETOF resolution Before tuning (during experiment) After tuning
EH2-EH1 (ns) vs esxfp (cm), All channel
EH2-EH1 (ns) vs esxfp (cm), w/o strange channels
Strange channels … EH2-17,19,21,23,25,27,19
Maybe one of discriminator for EHODO was wrong
2019/2/21

15. p suppression -> Listen Gogami’s talk for detail
Applied cut -> (haernpe1+haernpe2)<5 || (haernpe2+haernpe3)<5 || haernpe3+haernpe1<5
haernpe1+2+3 vs hmsq [GeV/c2]
black : before cut
red : after cut
-> Listen Gogami’s talk for detail
2019/2/21

16. p suppression -> Listen Gogami’s talk for detail
Applied cut -> (hwatnkn1+hwatnkn2)>6*hmsq-1.5
new ntuple content : hwatnkn1,2
Kaon npe =1, s=0.2
hwatnkn1+2 vs hmsq [GeV/c2]
black : before cut
red : after cut
-> Listen Gogami’s talk for detail
2019/2/21

17. coin time analysis TEFP TKFP TEt TKt HES Ref. Plane HKS Ref. Plane
TF2TE(xf, x’f, yf, y’f)
… G4 simulation
TF2TK(xf, x’f, yf, y’f)
… G4 simulation
TEt
TKt
Target
coin time = TKt-TEt
About TF2T
For the correction of path length
Calculated by G4
4th polynomial of xf, x’f, yf, y’f
Target : CH2
s~350ps
2019/2/21

18. FP distribution (HKS) background from certain Z CH2 run76315
G4, brems
G4, brems
kaonの漏れ込み？永尾解析
2019/2/21

19. FP distribution (HES) CH2 run76315 CH2 run76315 strange offset
effect of strange channel of EH2
G4, brems
G4, brems
ｙ‘問題, offset
2019/2/21

20. KD TOSCA model 1 KD TOSCA model (before modification) Picture
Pole edge shape was different from real one
KD TOSCA model (after modification)
2019/2/21

21. KD TOSCA model 2 By [T] Black：measured Red＊：before modification
Red×：after modification
z [mm]
2019/2/21

22. KD TOSCA model 3 TOSCA-measure [T] Black：Before modification
Red：After modification
(TOSCA-measure)/measure [%]
2019/2/21

23. Default matrix calculation
Magnification factor of KD, ED TOSCA map in G4
KD : 1.0, ED : 1.0
KD : 0.995, ED : 0.98
Other factors
KQ1=1.02
KQ2=1.055
EQ1=1.00
EQ2=1.00
-> Need to be optimised
L, S0 peak position is about -15MeV
Geometrical modification of magnets in G4
Included survey result in G4 -> not big change
2019/2/21

24. momentum at target (HKS)
ky’t vs kx’t (CH2 run, L selected)
kmom (CH2 run, L selected)
ky’t vs kx’t (G4, L source (uniform))
kmom (G4, L source (uniform))
2019/2/21

25. HKS SS pattern Run 76808 ↓ same histograms (different plot option) ↓
2019/2/21

26. momentum at target (HES)
ey’t vs ex’t (CH2 run, L selected)
emom (CH2 run, L selected)
come from
bad channel?
(->Gogami’s talk)
ey’t vs ex’t (G4, L source)
emom (G4, L source)
2019/2/21

27. HES SS pattern Run 76810 ↓ same histograms (different plot option) ↓
FP pattern
2019/2/21

28. missing mass – CH2 target -
Statistics
# of lambda ~ 3800, S/N ratio ~ 1.2
# of sigma ~ 780, S/N ratio ~ 0.55
s at L … 2.3 [MeV]
2019/2/21

29. Analysis Status @ H2O Run
Missing Mass spectrum (online, preliminary)
Comment
The number of L (Kaon) is less than expected value, why?
S/N ratio is worse than CH2 because of the window (Havar) of CH2
We took some beam energy scan data in H2O target.
count L
Mx-ML [MeV]
count
HKS-HES coin time spectrum
Beam momentum in H2O run
Nominal value
(2344MeV/c)
½とかは言わない方がよい、Havarのスペック
+20MeV/c
-1MeV/c
+1MeV/c ns
Hallcp [MeV/c]
12/15/2009
HKS-HES Collaboration Rome

30. missing mass – 12C target -
All Run
20uA Run
Make an offset so as to adjust L and S0 peak position. The position of g.s-like peak is slightly different from last experiment’s one.
The number of events in the g.s-like peak is 3-5 times smaller than the value calculated from the number of events in QF region.
2019/2/21

31. missing mass – 7Li target -
g.s-like peak and 5/2+, 3/2+-like peak can be seen at reasonable BL region.
The number of peak looks smaller than the value counted from QF events.
HES y’ cut : etheta>0.065, selecting almost upper half of EQ1.
E. Hiyama, Y. Yamamoto, T. Motoba, M. KamimuraPHYSICAL REVIEW C 80, (2009)
2019/2/21

32. missing mass – 10B target -
T. Motoba, M. Sotona and K. Itonaga, Prog. Thor. Phys. Suppl. No. 117 (1994) 123.　
g.s-like peak can be seen around –BL=8MeV
HES y’ cut : -(eyss)>-5 (cm)。
2019/2/21

33. Issue+To do summary Raster correction SS analysis Matrix tuning
Event selection from multiple events in engine
First check the number of Kaon. We can say something from the result of Z dependence of the number of Kaon.
The reduction of replay time
HES tracking code check (y’ offset problem)
HKS tracking code check (resolution, multiplicity)
Replay time reduction, especially for 52Cr and H2O run
How to evaluate the linearity of missing mass?
2019/2/21

34. HES tracking
2019/2/21

35. ETRACKING Procedure EHODO Analysis
Select proper ADC, TDC hit information
EDC Analysis
modified
Tracking w/ EDC1 and EHODO
Define the number of tracks in HES
modified
Select Good track
Check Very close tracks
modified
Tracking w/ EDC2
Fine tracking w/ EDC2, calc FP variables
Momentum Reconstruction
For beta calculation
Hit Selection, Physics
Select hits on the track
2019/2/21

36. FP resolution FP resolution ~ (DC plane resolution)/sqrt(# of plane)
EDC1 plane resolution (x) = 210mm
→ HES FP(x) resolution = 210/sqrt(6) [mm] ~ 86 [mm]
But … EDC plane resolution is bad in the coincidence trigger event!
Reason is EDC TDC start time is not determined by EHODO in the coin. trigger event.
s=780mm
s=250mm
EDC1-1 ds (wire SS Run
(75460)
EDC1-1 ds (wire CH2 Run
(76312)
2019/2/21

37. Starttime correction Make tracking only using x-x’ planes of EDC1
Pick a corresponding counter of EH1 and determine a starttime of the track
Subtract starttime from drift time of each wires
Make full-tracking using xx’, uu’, vv’
Pick some nearest hits on each planes of EDC2
Subtract corresponding starttime from drift time of each EDC2 wires
Make tracking including EDC2
EDC1
EDC2
Question
How may hits should be required for EDC2?
EH1
2019/2/21

38. Starttime correction result (only EDC1)
befotre
s=780mm
after
s=200mm
EDC1-1 ds (wire CH2 Run
(76312)
EDC1-1 ds (wire CH2 Run
(76312)
2019/2/21

39. SS pattern
run76810 (SS run)
←Only the angular results of EDC2 tracking were used
dray(1)=Xfp
dray(2)=Yfp
dray(3)=X’fp
dray(4)=Y’fp
2019/2/21

40. EDC1-1 EDC1-2 EDC1-3 EDC1-4 EDC1-5 EDC1-6 EDC1-7 EDC1-8 EDC1-9 EDC1-10
EDC1 drift time
run76312 (CH2 run)
EDC1-1
EDC1-2
100ns
EDC1-3
EDC1-4
EDC1-5
EDC1-6
EDC1-7
EDC1-8
EDC1-9
EDC1-10
2019/2/21

41. EDC2-1 EDC2-2 EDC2-3 EDC2-4 EDC2-5 EDC2-6 EDC2 drift time
run76312 (CH2 run)
EDC2-1
EDC2-2
100ns
EDC2-3
EDC2-4
EDC2-5
EDC2-6
2019/2/21

42. EDC1-1 EDC1-2 EDC1-3 EDC1-4 EDC1-5 EDC1-6 EDC1-7 EDC1-8 EDC1-9 EDC1-10
EDC1 tracking residual
run76312 (CH2 run)
include himself, typical residual = 250mm
EDC1-1
EDC1-2
EDC1-3
EDC1-4
EDC1-5
EDC1-6
EDC1-7
EDC1-8
EDC1-9
EDC1-10
2019/2/21
2019/2/21

43. EDC2-1 EDC2-2 EDC2-3 EDC2-4 EDC2-5 EDC2-6 EDC2 tracking residual
run76312 (CH2 run)
include himself, typical residual = 250mm
EDC2-1
EDC2-2
EDC2-3
EDC2-4
EDC2-5
EDC2-6
2019/2/21
2019/2/21