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Study of the ND Data/MC for the CC analysis. October 14, 2005 MINOS collaboration meeting M.Ishitsuka Indiana University. Motivation. Check of. Event reconstruction (track, shower) Detector performance MC (neutrino interaction, nuclear effect, B-field)

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Study of the nd data mc for the cc analysis

Study of the ND Data/MC for the CC analysis

October 14, 2005 MINOS collaboration meeting

M.Ishitsuka

Indiana University


Motivation
Motivation

Check of

  • Event reconstruction (track, shower)

  • Detector performance

  • MC (neutrino interaction, nuclear effect, B-field)

  • Beam status (vertex, direction, spectrum)

  • Stability of data

How should we use ND Data in analysis?

 Measurement of neutrino spectrum and y by the ND data


Data mc and cuts in this talk
Data/MC and cuts in this talk

R1.18 LE, pME and pHE Data/MC

Data LE: March 4.23x1017pot

LE: June-September (not all) 8.11x1018pot

pME 5.12x1017pot

pHE 1.58x1018pot

MC LE n13xxxL010185 2.80x1018pot

pME n13xxxL100200 1.40x1018pot

pHE n13xxxL250200 9.74x1018pot

MC in all plots are normalized by the POT of the data.

  • Beam quality cut by using DB (BEAMMONSPILL)

  • W/ reconstructed track

  • Reconstructed vertex in {R from beam center<50cm & 1 < z < 3.5 m}

  • DP’s PID > -0.2


Select cc enriched sample pid by david
Select CC enriched sample (PID by David)

R1.18

LE

pME

pHE

LE data (March) 511.1+/-11.0  384.3+/-9.5

LE data 486.7+/-2.4  365.6+/-2.1

LE MC 537.1+/-4.4(86.3%)  423.9+/-3.9(95.8)

pME data 911.8+/-13.3  655.3+/-11.3

pME MC 1022.7+/-8.6 (85.0)  781.1+/-7.5 (96.4)

pHE data 1395.8+/-9.4  988.7+/-7.9

pHE MC 1521.8+/-12.5 (83.9)  1151.8+/-10.9 (96.8)

Data (March)

Data

MC

Data

MC

Data

MC

CC

NC

#events/1017POT before and after PID cut (CC fraction %)

NC

anti-n

CC efficiency

-9.3%

NC miss-ID

-16.1%

-14.2%


Vertex and end point

March Data: green boxes

June-Sep. Data: black points

MC: red lines

vertex and end point

LE

R1.18

Track vertex x

Track vertex y

Track vertex z

Track end x

Track end y

Track end z


Vertex and end point1
vertex and end point

Data: black points

MC: red lines

pME

R1.18

Track vertex x

Track vertex y

Track vertex z

Track end x

Track end y

Track end z


Vertex and end point2
vertex and end point

Data: black points

MC: Red lines

pHE

R1.18

Track vertex x

Track vertex y

Track vertex z

Track end x

Track end y

Track end z


Track momentum
Track momentum

R1.18

LE

pME

pHE

Track length (fully contained)

Data

MC

Data

MC

March Data

Data

MC

Curvature

NC

anti-n

NC

anti-n

NC

anti-n


Angular difference of track from beam direction
Angular difference of track from beam direction

R1.18

LE

pME

pHE

March Data

Data

MC

Data

MC

Data

MC

QE

NC

Suppression in forward direction (low-Q2)  need additional cut to identify the source

Reco. Y < 0.2 for LE

 QE enriched sample

Reco. Y > 0.2 for pME and pHE

 DIS enriched sample


Angular difference of track from beam direction for qe and dis enriched sample
Angular difference of track from beam direction for QE and DIS enriched sample

R1.18

LE

pME

pHE

Data

MC

Data

MC

Data

MC

Reco. y>0.2

Reco. y<0.2

Reco. Y>0.2

DIS

QE

DIS

Reco. QE Q2

Small forward supression in QE enriched sample (LE)  strong suppression in K2K & MiniBoone

Forward suppression in DIS enriched sample (pME,pHE)  could be explained by Bodek&Yang

Data

MC

QE

Reco. Y<0.2


Reconstructed shower energy and y
Reconstructed shower energy and y DIS enriched sample

R1.18

LE

pME

pHE

Shower energy = NtpSRShower->ph.linCCgev

Data

MC

Data

MC

March Data

Data

MC

QE

RES

DIS

NC

QE

RES

DIS

NC

QE

RES

DIS

NC

y


Reconstructed e n e m eshw
Reconstructed E DIS enriched samplen (= Em + Eshw)

R1.18

LE

pME

pHE

March Data

Data

MC W/ syst.

Data

MC W/ syst.

Data

MC W/ syst.

QE

RES

DIS

NC

QE

RES

DIS

NC

QE

RES

DIS

NC

Peak position: (Data-MC)/MC

  • Better agreement than Ely plots W/ nuclear effect (pME and pHE)

  • ~1 GeV shift still exist  better agreement W/ de-weighted shower energy


Beam profile after reconstruction and comparison with fd spectrum reco e n
Beam profile after reconstruction and comparison with FD spectrum (reco. En)

R1.18

LE

Rbeam < 10cm

Rbeam < 30cm

Rbeam < 50cm

Data

MC (ND)

Spectrum at FD

Data

MC (ND)

Spectrum at FD

Data

MC (ND)

Spectrum at FD

  • good agreement in all regions

  • Need more statistic of MC for more detailed study


Measurement of neutrino spectrum and y by the nd data
Measurement of neutrino spectrum and y by the ND data spectrum (reco. E

  • motivation

efficiency

Flux

Fiducial mass

cross-section

Parameters  measure by the ND data

  • procedure

True y

dEm (10%) and dEshw (10%) are also considered in fit

True En


Data and bin in this analysis
Data and bin in this analysis spectrum (reco. E

R1.18 LE

Reco. y > 0.8

Data 2.20x1018pot

MC 2.80x1018pot

0.6 < y < 0.8

0.5 < y < 0.6

  • Beam quality cut

  • W/ reconstructed track

  • R<1m & 1<z<5 m

  • DP’s PID > -0.2

0.4 < y < 0.5

0.3 < y < 0.4

0.2 < y < 0.3

Data: black

MC: red (normalized by POT)

0.1 < y < 0.2

Reco. y < 0.1

c2 = 919.2/152d.o.f.

Reconstructed En


Mc parameters bin and profile
MC parameters bin and profile spectrum (reco. E

NC (8)

CC (8x4)

True y

QE

RES

DIS

True En


Result of fit 1 s 20 for all parameters
Result of fit (1- spectrum (reco. Es=20% for all parameters)

Data: black

MC: red (normalized by POT)

Best fit: blue

Reco. y > 0.8

0.6 < y < 0.8

c2 = 136.6/152d.o.f.

0.5 < y < 0.6

Best-fit parameters

dEm=+5%, dEshw=-13%

0.4 < y < 0.5

0.18

NC

-0.1

0.3 < y < 0.4

0.2 < y < 0.3

CC

0.1 < y < 0.2

Reco. y < 0.1

Reconstructed En


Should be free parameters
Should be free parameters? spectrum (reco. E

Data: black

MC: red (normalized by POT)

Best fit: blue

Reco. y > 0.8

0.6 < y < 0.8

c2 = 107.2/112d.o.f.

0.5 < y < 0.6

Best-fit parameters

dEm=+5%, dEshw=-13%

0.4 < y < 0.5

0.3

NC

-0.5

0.3 < y < 0.4

0.2 < y < 0.3

CC

0.1 < y < 0.2

Reco. y < 0.1

Reconstructed En


Summary
summary spectrum (reco. E

  • Study of R1.18 ND Data/MC with CC selection

  • ~10% difference in #events/POT

  • Data indicate low-Q2 suppression in DIS (pME, pHE)

  • ~1GeV shift in pME, pHE spectrum

  • Measurement of neutrino spectrum and y is carried out by the ND Data

Plan

  • CC analysis by using the measured spectrum and y

E scale

ND

FD

FD/ND error


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