PEANUT meeting Fermilab Giovanni and Komatsu 23/Jan./2007

Agenda 1. NuMI - MINOS Short summary of NuMI-MINOS status... Gina 2. PEANUT summary Situation of PEANUT analysis... Komatsu European Scanning System(ESS)... Giovanni SUTS status... Komatsu 3. SFT based analysis PoT of PEANUT... Gina Scanback result of BL Fukuda Time stumping for Emulsion tracks... Nonoyama Activity in Naples... Giovanni Summary of European lab analysis... Giovanni 4. Non-bias analysis Full area scanning in Naples... Giovanni SUTS scanning of BL Morishima NetScan for BL Komatsu 5. Discussion for paper 6. New exposure NuMI-MINERvA plan and schedule... Vittorio Exposure plan Gina reported about PoT of NuMI She will provide PoT corresponds to PEANUT exposure period. Giovanni and Komatsu made a review of Scanning system we have. Two main analysis scheme is reported, One is SFT based analysis and the other is general scan. Then we discussed work sharing between US side and Japan and Europe side.

PEANUT period

Situation of PEANUT analysis Before last December, works in each lab was not synchronized. –We re-form PEANUT analysis working group to work for physics output. –Regular meeting (video link) is scheduled. We decided to do PEANUT analysis in OPERA frame work at least for all labs. –CS(PL2 and 2) scanning –Scanback First phase : SFT matching required Second phase : All CS tracks Non-bias analysis, apart from OPERA

Scanning status in Europe Giovanni De Lellis University of Naples

Brick number Brick wall Lab Exposure days Cosmic rays (h) SFT align ment SFT trigger Emulsion-SFT position offset (resolution) μm Emulsion-SFT angular offset (resolution) mrad Scanning modeIn progress BL0892Bari2812OK3-D tracks5310 (792), 3359 (735)3 (17), 5 (15)predictiontotal scan BL0422Bari212not yetgeneral 37cm 2 for 3 platesSFT alignment BL0912Bari2812not yetgeneral 26cm 2 for 3 platesSFT alignment BL0922Bern3012OK BL0341Bologna182OK9/20 planes9072 (770), 1755 (890)6 (8), 6 (9)general 80cm 2 for 26 platesgeneral scan BL0442Bologna212OKgeneral 30cm 2 for 57 plates BL0882Bologna2812OK9/20 planes10564 (474), 3456 (566)10 (7), 10 (10) general 80cm 2 for 23 plates; scan-back from triplets (250) total scan Lyon BL0452LNGS202not yet general: 16cm 2 for 3 plates; 80cm 2 for 2 plates; 16cm 2 for 3 plates with new filter SFT alignment BL0563LNGS2112not yetgeneral 16cm 2 for 2 platesSFT alignment BL0331Naples182OK9/20 planes (605), (443)-24. (5.), -3. (8.) general 48cm 2 for 43 plates and 24cm 2 for 57 plates general BL0462Naples182OK7/20 planes-6830 (430), (430)-3. (6.), -3. (8.)general 100cm 2 for 3 plates BL0543Naples2112not yet general 9cm 2 for 7 plates (efficiency) BL0432Neuchatel212not yet general 16cm 2 for 18 plates scan-back from 3 first plates volume scan - SFT alignement BL0811Salerno3612OK3D Tracks-6164 (491), (482)-7. (7.), -7. (7.)General on 2 plates BL0821Salerno3612OK3D Tracks-4237 (490), (484)-8. (7.), -13. (7.)General on 2 plates BL0472Salerno212OK3D Tracks-5700 (745), (465)-12. (5.), -9. (4.)General on 2 plates

Conclusion 17 bricks under analysis in Europe (about 1000 events expected) Emulsion to SFT alignment performed for the majority of them The scan-back has been performed in a few bricks only Different criteria have been used: SFT triggers, SFT- emulsion matching and volume around the stopping point to be scanned (skewed, how many, etc..) Unification of all the cuts is ongoing: trigger conditions, SFT matching criteria and volume scanning standardized After a quick revision of the analysis, it will be possible to merge all the data

Time stamping for Emulsion Tracks with Gyaku Data Base method Y.Nonoyama

Residual of Emulsion track to hits of directory below plane This showed residual. extension emulsion track to below SFT plane. Select tracks matching with SFT trigger as Rock Muon type by eyes. y x x y 2 3 mm If matching is real, its residual will be into 500  m. mm

PL 43 I.P. 1.5  m

summary Now looking for good separation parameter. One is below SFT plane hits. This selection power is very good. Bud SFT link efficiency is effected by SFT efficiency. So, other selection parameter will be needed for efficiency.

Reconstruction of neutrino interactions in PEANUT in general scanning (unbiased) mode Giovanni De Lellis on behalf of Andrea Russo Naples University

Scanning areas All 57 plates have been general scanned: 5.55 x 4.30 cm^2 = 23.9cm^2 General scanning mode Measured density of aligned base-tracks: 4 base-track / mm 2 (transportation order) 0.7 base-track / mm 2 (assembly order) 38 plates have been general scanned: 11.1 x 4.30 cm^2 = 47.8 cm^2

Beam tracks at least 4 segments in the plots shown NuMI beam peak (  x,  y ) ~ (-50,0) mrad MIP particles: ~ 24 Tracking efficiency Density of aligned base-tracks ~ 0.7 / mm 2

Expected number of events in the brick BeamBeginEndDuration (days) NEUTRINO 2005/10/20 16: /11/07 09: COSMIC 2005/11/07 09: /11/07 11: Neutrino interaction rate in an iron target exposed to NuMI in the near hall (2 * 10 5 ) / (year * ton) 43 ± 7 neutrino interactions expected in the analyzed volume N mes /  total = 44 ± 9 neutrino interactions estimated from the 24 observed events after efficiency correction This value (increased by 8%) accounts for the lead target

Conclusions A volume of 413 cm 3 (58% of the brick volume) was general scanned in one PEANUT brick Detailed single brick Monte Carlo simulation of PEANUT used to define a procedure to identify neutrino interactions 24 neutrino interactions with SFT matching have been identified in the volume After the efficiency correction, we estimate (44 ± 9) neutrino interactions happening in the volume Good agreement with the number of expected events (43 ± 7) computed from the flux 8 events with larger multiplicity found without any match with the SFT (6 with 3 tracks, 1 with 4 and 1 with 9 tracks)

NetScan for BL118 PEANUT Fermilab 22-23/Jan/2007

Possibility of non-bias analysis Naples already did full scanning for one brick. –Giovanni’s report Pilot analysis of BL118 NetScan is started. –5x5 25cm 2 area is scanned by SUTS Today I report first 21 plate data. We used base track for NetScan framework –For the first attempt. –How much we can reduce scanning power is next subject.

Nagoya->Fermilab Fermilab->Nagoya Pulse Height distribution

Nagoya->Fermilab Fermilab->Nagoya Efficiency as a function of slope

Alignment in exposure Virtual erasing is applied –3,530,479 base track remains for 21 plate. –Right table shows number of base tracks for each plate. –Still large amount of junk base track is there. ECFSAL –139,777 track (nseg>=2) are reconstructed. 128,015(2seg), 8,294 track (3seg) 3,468 track (nseg>=4) –Too large amount of nseg<=3 To reduce junk track, I applied 30mrad angular much for nseg<=3 tracks Reduced to 37,125(2seg), 1,475(3seg) f f f f f f f f f f f f f f f f f f f f f total

4 segment or more track

Eff. As a function of slope Eff. As a function of plate

Preliminary vertex hunting ECVTXA is used for preliminary vertex hunting Another 23 two track vertex IP<20 is exist. Local alignment is not done.

Summary Apart from OPERA, NetScan is good method to perform non-bias neutrino interaction analysis. –Especially for electron neutrino location. NetScan with SUTS is feasible. –But, currently noise track density is bit too high to do clean analysis.SUTS scanning should be well tuned. –Also, cut applied for base track is too tight.Should be revised.

Discussion for paper We agree on two types of output –SFT track based scanback. –General scan to detect electron neutrino flux. US provide PoT and SFT-MINOS matching information soon. –Komatsu (Luca) provide list of SFT 3D tracks. Already sub-sample matching has done in year ago. One target date to make summary is mid April (MINOS-meeting is scheduled)

Location of MINERvA

Schedule of various MINER A detectors… Calibration DB Slow Controls, Monitoring Core Reconstruction Software Neutrino Beam Simulations, Measurements Detector Simulation “Real” DAQ (From December 2006 Miner a collaboration meeting)

Possibility of new exposure There is interference between PEANUT and MINERvA. –MINERvA installation will start on end of 2007 –Summer shutdown is foreseen in June or July. –PEANUT detector should move to somewhere before MINERvA installation start. Komatsu propose possible configuration for new exposure with lighter brick (not OPERA brick). –T952 second run needs some paper works to be approved.