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m + : Status, first results and outlook. Peter Winter. m + / m - discrimination. TPC.  eLog:92.  TrendPlotViewer. m -. m +. m + / m - discrimination. c 2. m + magnet setting. Data sets have to be sorted by magnet: polarity | Run 11

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M status first results and outlook
m+: Status, first results and outlook

Peter Winter


M m discrimination
m+ / m- discrimination

TPC

 eLog:92

 TrendPlotViewer


m-

m+


M m discrimination1
m+ / m- discrimination

c2


M magnet setting
m+ magnet setting

  • Data sets have to be sorted by magnet: polarity | Run 11

  • -----------------------------------------

  • +125 A | 1220 (3.7  108)

  • - 125 A | 3500 (9  108)

  • 0 A | 840

 eLog:189


M magnet setting1
m+ magnet setting

  • Data sets have to be sorted by magnet: polarity | Run 11

  • -----------------------------------------

  • +125 A | 1220 (3.7  108)

  • - 125 A | 3500 (9  108)

  • 0 A | 840

  • But can we prove the database entries?

 eLog:189


M magnet setting2
m+ magnet setting

m+ magnet +

m+ magnet -


M classification
m+ classification

  • Tools to discriminate m+ / m- and magnet polarity available

  • Might need some more refinement

  • Needs to be simply done carefully for final production


M fitting summary
m+ fitting summary

N(t) = N0lwexp(-lt)  [1 + A  P(t) sin(wt+f)] + B


M fitting summary1
m+ fitting summary

N(t) = N0lwexp(-lt)  [1 + A  P(t) sin(wt+f)] + B

P(t) = exp(-lmsr2 t2/2)

P(t) = exp(-lmsrt)


M fitting summary2
m+ fitting summary

N(t) = N0lwexp(-lt)  [1 + A  P(t) sin(wt+f)] + B

P(t) = exp(-lmsr2 t2/2)


M fitting summary3
m+ fitting summary

N(t) = N0lwexp(-lt)  [1 + A  P(t) sin(wt+f)] + B

P(t) = exp(-lmsr2 t2/2)

  • Initialize muSR parameters A, w, f, lmsr from difference histograms


M fitting summary4
m+ fitting summary

N(t) = N0lwexp(-lt)  [1 + A  P(t) sin(wt+f)] + B

P(t) = exp(-lmsr2 t2/2)

  • Initialize muSR parameters A, w, f, lmsrfrom difference histograms

  • Fix muSR parameters A, w, f, lmsr and fit lifetime parameters N0, l, B


M fitting summary5
m+ fitting summary

N(t) = N0lwexp(-lt)  [1 + A  P(t) sin(wt+f)] + B

P(t) = exp(-lmsr2 t2/2)

  • Initialize muSR parameters A, w, f, lmsrfrom difference histograms

  • Fix muSR parameters A, w, f, lmsr and fit lifetime parameters N0, l, B

  • Release A, w, f one by one and fit again.


M fit results
m+ fit results:


M fit results1
m+ fit results:

  • versus Gondola scan

  • &

  • l versus nContEH scan

 eLog:198


M fit gondola scan 125a
m+ fit: Gondola scan (+125A)


M fit gondola scan 125a1
m+ fit: Gondola scan (-125A)


M fit nconteh scan 125a
m+ fit: nContEH scan (+125A)


M fit nconteh scan 125a1
m+ fit: nContEH scan (-125A)


M fit results2
m+ fit results:

l versus TPC bin

21

22

23

24

10

9

11

12

6

5

7

8

2

1

3

4

 eLog:213

 eLog:214


M fit tpc volume scan 125a
m+ fit: TPC volume scan (+125A)


M fit nconteh scan 125a2
m+ fit: nContEH scan (-125A)


M m l versus nconteh
m+ / m-: l versus nContEH

 eLog:226


M m nconteh distribution
m+ / m-: nContEH distribution

 eLog:222


Scatter estimate d r m m ppm
Scatter estimate: DR(m- - m+) [ppm]

Scatter effect estimate:  eLog:233


Scatter estimate d r m m ppm1

?

Scatter estimate: DR(m- - m+) [ppm]

+125 A,

y>0

-125 A,

y>0

-125 A,

y<0

+125 A,

y<0


Scatter estimate d r m m ppm2
Scatter estimate: DR(m- - m+) [ppm]

+125 A, y>0

-125 A, y>0

-125 A, y<0

+125 A, y<0

DR(S 4 data sets) = 471  382 ppm


Scatter estimate d r m m ppm3
Scatter estimate: DR(m- - m+) [ppm]

+125 A, y>0

-125 A, y<0

+125 A, y<0

DR(S 4 data sets) = 471  382 ppm

DR(S 3 data sets) = 2619  373 ppm


Scatter estimate dl ppm
Scatter estimate: Dl [ppm]

DR(S 4 data sets) = 471  382 ppm

DR(S 3 data sets) = 2619  373 ppm

Dl = DR * e

  • = fraction of nContEH=1

  • = 0.0135

Dl(S 4 data sets) = 6.4  5 s-1

Dl(S 3 data sets) = 35  5 s-1


M m conclusion
m+ / m-: Conclusion

  • Effect sizeable but lots of work still needed

    • Differences in nContEH(y) distribution

    • Study more differential (y, ...)

    • Differences in dE/dx might affect nContEH?

  • mu+ inconsistencies need to be resolved:

    • mu+ datasets +125A and -125A differ

    • mu+ fits don't converge all the time


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