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A High-Statistics -Nucleus Scattering ExperimentUsing an On-Axis, Fine-grained Detector

in the NuMI Beam

Jorge G. Morfín - Fermilaband

Hugh Gallagher - Tufts

MINERA (Main INjector ExpeRiment v-A)

Received Physics Approval from Fermilab PAC in April

New Experiment in the Fermilab Neutrino Program

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A High-Statistics -Nucleus Scattering ExperimentUsing an On-Axis, Fine-grained Detector

in the NuMI Beam

Jorge G. Morfín - Fermilaband

Hugh Gallagher - Tufts

MINERA (Main INjector ExpeRiment v-A)

YOUR REGISTRATION AT HOTEL MINERVE DOES NOT

BRING AUTOMATIC MEMBERSHIP IN MINERA !!

New Experiment in the Fermilab Neutrino Program

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Both HEP and NP collaboratorsD. Drakoulakos, P. Stamoulis, G. Tzanakos, M. Zois

University of Athens, Athens, Greece

D. CasperUniversity of California, Irvine, California

E. PaschosUniversity of Dortmund, Dortmund, Germany

D. Boehnlein, D. A. Harris, M. Kostin, J.G. Morfin, P. Shanahan, P. Spentzouris

Fermi National Accelerator Laboratory, Batavia, Illinois

M.E. Christy, W. Hinton, C.E .KeppelHampton University, Hampton, Virginia

R. Burnstein, A. Chakravorty, O. Kamaev, N. SolomeyIllinois Institute of Technology, Chicago, Illinois

S.KulaginInstitute for Nuclear Research, Moscow, Russia

I. Niculescu. G. .NiculescuJames Madison University, Harrisonburg, Virginia

G. Blazey, M.A.C. Cummings, V. RykalinNorthern Illinois University, DeKalb, Illinois

W.K. Brooks, A. Bruell, R. Ent, D. Gaskell,,W. Melnitchouk, S. Wood

Jefferson Lab, Newport News, Virginia

S. Boyd, D. Naples, V. PaoloneUniversity of Pittsburgh, Pittsburgh, Pennsylvania

A. Bodek, H. Budd, J. Chvojka, P. de Babaro, S. Manly, K. McFarland, I.C. Park, W. Sakumoto, R. TengUniversity of Rochester, Rochester, New York

R. Gilman, C. Glasshausser, X. Jiang, G. Kumbartzki,K. McCormick, R. Ransome

Rutgers University, New Brunswick, New Jersey

H. Gallagher, T. Kafka, W.A. Mann, W. OliverTufts University, Medford, Massachusetts

J. NelsonWilliam and Mary College, Williamsburg, Virginia

Red = HEP, Blue = NP, Green = Theorist

Quantitative Study of Low-energy -Nucleus Interactions

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Typical samples of NC 1-production ANL

p n + (7 events) n n 0 (7 events)

Gargamelle p p 0 (240 evts) n n 0 (31 evts)

K2K and MiniBooNe Starting a careful analysis of single 0

production.

Strange Particle Production Gargamelle-PS - 15 events. FNAL - ≈ 100 events ZGS - 7 events BNL - 8 events Larger NOMAD sample expected

CC

Motivation: Detailed Knowledge of low-energy Neutrino-Nucleus Interactions DISMAL

As we saw MiniBooNe and K2K improving the situation at Lower Energies

+ n - + p

S. Zeller - NuInt04

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The MINERA Detector

Active target of scintillator bars (6t total, 3 - 5 t fiducial) - M64PMT Surrounded by calorimeters

upstream calorimeters are Pb, Fe targets (~1t each) magnetized side and downstream tracker/calorimeter

C, Fe and PbNuclear targets

OPTIONAL

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Active Target Module

Planes of strips are hexagonal inner detector: active scintillator strip tracker rotated by 60º to get stereo U and V views Pb “washers” around outer 15 cm of active target outer detector: frame, HCAL, spectrometer XUXV planes module

Inner, fully-activestrip detector

Outer Detectormagnetized sampling

calorimeter

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Performance of the Detector:Tracking in Active Target

technique pioneered by D0 upgrade pre-shower detector

Coordinate resolution from triangular geometry is excellent

~ 2-3 mm in transverse direction from light sharing

3.3cm

1.7cm

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Location in NuMI Near Hall

MINERA preferred running is as close as possible to MINOS, (without Muon Ranger), using MINOS as high energy muon spectrometer If necessary, MINERA can run stand-alone elsewhere in the hall with the muon ranger

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The NuMI Neutrino Beam andNear Detector Hall

Main injector: 120 GeV protons

110 m

1 km

Move target only

Move target andSecond horn With E-907(MIPP) at Fermilab to

measure particle spectra from the NuMI target,expect to know neutrino flux to

≈ ± 3-4 %.

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MINERA will have the statistics to cover a wide variety of important physics topics

Main Physics Topics with Expected Produced Statistics

Quasi-elastic 300 K events off 3 tons CH Resonance Production 600 K total, 450 K 1 Coherent Pion Production 25 K CC / 12.5 K NC Nuclear Effects C:0.6M, Fe: 1M and Pb: 1 M T and Structure Functions 2.8 M total /1.2 M DIS event Strange and Charm Particle Production > 60 K fully reconstructed events Generalized Parton Distributions (few K events?)

Assume 9x1020 POT: MINOS chooses 7.0x1020 in LE beam, 1.2x1020 in sME and 0.8x1020 in sHE

Event Rates per fiducial tonProcess CC NCQuasi-elastic 103 K 42 KResonance 196 K 70 KTransition 210 K 65 KDIS 420 K 125 KCoherent 8.4 K 4.2 KTOTAL 940 K 305 K

Typical Fiducial Volume = 3-5 tons CH, 0.6 ton C, ≈ 1 ton Fe

and ≈ 1 ton Pb

3 - 4.5 M events in CH0.5 M events in C1 M events in Fe1 M events in Pb

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A few MINERA Physics Results:Quasi-elastic Scattering

MINERA: 300 K events off CH and over 100 K off of Fe and Pb Cross-section important for

understanding low-energy neutrino oscillation results and needed for all low energy neutrino monte carlos used in neutrino oscillation analyses.

Constrained kinematics help measure final state interactions off three different nuclear targets.

MINERA

Expected MiniBooNeAnd K2K measurements

S. Zeller - NuInt04

Expected MiniBooNe and K2K measurements

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Coherent Pion Production MINERA: 25 K CC / 12.5 K NC events off C - 8.3 K CC/ 4.2 K NC off Fe and Pb

MINERA

•Characterized by a small energy transfer to the nucleus, forward going . NC (0 production) significant background for --> .e oscillation search

•Data has not been precise enough to discriminate between several very different models.

•Expect roughly (30-40)% detection efficiency with MINERA.

•Can also study A-dependence with MINERA

Expected MiniBooNe and K2K measurements

Rein-Seghal

Paschos-Kartavtsev

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Nuclear Effects MINERA: 2.8 M events off CH, 600 K off C and 1 M events off of Fe and Pb

Q2 distribution for SciBar detector

MiniBooNEFrom J. Raaf(NOON04)

All “known” nuclear effects taken into account:Pauli suppression, Fermi Motion, Final State Interactions

They have not included low- shadowing that is only allowed with axial-vector (Boris Kopeliovich at NuInt04)

Lc = 2 / (m2 + Q2) ≥ RA (not m

2) Lc

100 times shorter with mallowing low -low Q2 shadowing

ONLY MEASURABLE VIA NEUTRINO - NUCLEUS INTERACTIONS! MINERA WILL MEASURE THIS ACROSS A WIDE AND Q2 RANGE WITH C : Fe : Pb

Problem has existed for close to three years

Larger than expected rollover at low Q2

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Importance for Neutrino Oscillation ExperimentsHow Nuclear Effects enter m2 Analyses

Measurement of m2 with MINOS Need to understand the relationship

between the incoming neutrino energy and the visible energy in the detector

Expected from MINERA Improve understanding of pion and

nucleon absorption Understand intra-nuclear scattering

effects Understand how to extrapolate these

effects from one A to another Improve measurement of pion

production cross-sections Understand low- shadowing with

neutrinos

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How MINERA Would Help Off-axis Experiments

Current Accuracy of Low-energy Cross-sectionsQE = 20%RES = 40%DIS = 20%

COH = 100%

With MINERnA Measurements of QE = 5%

RES = 5, 10% (CC, NC)DIS = 5%

COH = 20%

Total fractional error in the background predictions as a function of Near Detector off-axis Angle

Without MINERA measurements of oscillation probability measurement could be limited by systematics!

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Detector: Cost Summary and ScheduleBeam and Experimental Hall already Exist!

Costs are primarily scaled from experience of MINERA collaborators on CMS HCAL and MINOS

$2.55Mequipment

$1.41Mlabor, EDIA

$1.54Mcontingency(39% avg.)

Sum $5.5M

Full project costs not updated since proposal (steel costs up)

Schedule for full detector: ~ 26 - 30 months from start

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Summary

MINERA, a recently approved experiment, brings together the expertise of the HEP and NP communities to address the challenges of low-energy -A physics.

MINERA will accumulate significantly more events in important exclusive channels across a wider E range than currently available. With excellent knowledge of the beam, will be well-measured.

With C, Fe and Pb targets MINERA will enable a systematic study of nuclear effects in -A interactions, known to be different than well-studied e-A channels.

MINERA results will dramatically improve the systematic errors of current and future neutrino oscillation experiments.

We welcome additional collaborators!!