+ : Status, first results and outlook Peter Winter.

m+: Status, first results and outlook

Peter Winter

m+ / m- discrimination

eLog:92 TrendPlotViewer

TPC

m- m+

c2

m+ / m- discrimination

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 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 setting

m+ magnet + m+ magnet -

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

N(t) = N0 l w exp(-lt) [1 + A P(t) sin(wt+f)] + B

m+ fitting summary

N(t) = N0 l w exp(-lt) [1 + A P(t) sin(wt+f)] + B

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

P(t) = exp(-lmsr t)

m+ fitting summary

N(t) = N0 l w exp(-lt) [1 + A P(t) sin(wt+f)] + B

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

m+ fitting summary

N(t) = N0 l w exp(-lt) [1 + A P(t) sin(wt+f)] + B

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

1. Initialize muSR parameters A, w, f, lmsr from difference histograms

m+ fitting summary

N(t) = N0 l w exp(-lt) [1 + A P(t) sin(wt+f)] + B

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

1. Initialize muSR parameters A, w, f, lmsr from difference histograms

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

m+ fitting summary

N(t) = N0 l w exp(-lt) [1 + A P(t) sin(wt+f)] + B

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

1. Initialize muSR parameters A, w, f, lmsr from difference histograms

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

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

m+ fit results:

m+ fit results:

eLog:198

l versus Gondola scan

&

l versus nContEH scan

m+ fit: Gondola scan (+125A)

m+ fit: Gondola scan (-125A)

m+ fit: nContEH scan (+125A)

m+ fit: nContEH scan (-125A)

m+ fit results:

eLog:213

l versus TPC bin

1 2 3 4

5 6 7 8

9 10 11 12

21 22 23 24

eLog:214

m+ fit: TPC volume scan (+125A)

m+ fit: nContEH scan (-125A)

m+ / m-: l versus nContEH

eLog:226

m+ / m-: nContEH distribution

eLog:222

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

Scatter effect estimate: eLog:233

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

+125 A, y>0

-125 A, y>0

-125 A, y<0

+125 A,y<0

?

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: 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]

DR( S 4 data sets) = 471 382 ppm

DR( S 3 data sets) = 2619 373 ppm

= Dl DR * e

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

• 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