A status report on the miner n a neutrino experiment
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A status report on the MINER n A neutrino Experiment. Steven Manly, University of Rochester Representing the MINER  A collaboration HEP 2012, Valparaiso, Chile January 4-10 , 2012. What is MINER n A ?. Main Injector ExpeRiment -A.

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A status report on the miner n a neutrino experiment

A status report on the MINERnA neutrino Experiment

Steven Manly, University of Rochester

Representing the MINERA collaboration

HEP 2012, Valparaiso, Chile

January 4-10 , 2012


A status report on the miner n a neutrino experiment

What is MINERnA?

Main Injector ExpeRiment-A

  • A fully active, high resolution detector designed to study neutrino reactions in detail

  • Sited upstream of the MINOS near detector in the NuMI beam at Fermilab

  • Will study neutrino reactions on a variety of nuclei

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


The mine r na collaboration main injector experiment n a

The MINERnA CollaborationMain Injector ExpeRimentn-A

  • University of Athens, Athens, Greece

  • Centro Brasileiro de PesquisasFisicas, Rio de Janeiro, Brazil

  • UC Irvine, Irvine, CA, USA

  • Fermi National Accelerator Lab, Batavia, IL, USA

  • University of Florida, Gainsville, FL, USA

  • Universidad de Guanajuato, Guanajuato, Mexico

  • Hampton University, Hampton, VA, USA

  • Institute for Nuclear Research, Moscow, Russia

  • James Madison University, Harrisonburg, VA, USA

  • Mass. Coll. of Liberal Arts, North Adams, MA, USA

  • University of Minnesota-Duluth, Duluth, MN, USA

  • Northwestern University, Evanston, IL, USA

  • Otterbein College, Westerville, OH, USA

  • University of Pittsburgh, Pittsburgh, PA, USA

  • Pontificia Universidad Catolica del Peru, Lima, Peru

  • University of Rochester, Rochester, NY, USA

  • Rutgers University, Piscataway, NJ, USA

  • Universidad Tecnica Federico Santa Maria, Valparaiso, Chile

  • University of Texas, Austin, TX, USA

  • Tufts University, Medford, MA, USA

  • Universidad Nacional de Ingenieria, Lima, Peru

  • College of William & Mary, Williamsburg, VA, USA

A collaboration of about 80 nuclear and particle physicists from 21 institutions

Note the large Latin American contribution!

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


N interaction physics

n interaction physics

MINOS

T2K

CNGS

  • noscillation experiments need to understand n reactions on nuclear targets in the 1-10 GeV region

  • Older Data Problematic

    • 20-50% uncertainties, depending on process

  • The nuclear physics was not well understood

NOvA

Shown coverages are “powerpoint approximate”

LBNE

MINERvA

Plot from G. Zeller

Single p

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Ccqe recent results

CCQE – recent results

  • Inconsistency between MiniBooNE/SciBooNE and NOMAD results

  • Gap falls in midst of MINERA coverage

Aguilar-Arevalo et al., PRD 81, 092005 (2010)

ArXiv:0812.4543

Acaraz et al., AIP Conf. Proc. 1189.145 (2009)

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Miner n a

MINERnA

  • Precision measurement of cross sections in the 1-10 Gev region

    • Understand the various components of cross section both CC and NC

      • CC & NC quasi-elastic

      • Resonance production, D(1232)

      • Resonance↔deep inelastic scatter, (quark-hadron duality)

      • Deep Inelastic Scattering

  • Study A dependence of n interactions in a wide range of nuclei

  • Need high intensity, well understood n beam with fine grained, well understood detector.

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Numi beamline

NuMIBeamline

Muon Monitors

νμ

Absorber

Decay Pipe

Horns

Target

μ+

π+

  • 120 GeV P Beam → C target → π+− & K+ −

  • Have roughly 35x1012 protons on target (POT) per spill at 120 GeV with a beam power of 300-350 kW at ~0.5 Hz

  • 2 horns focus π+ and K+ only

  • Mean En increased by moving target and one horn

  • π+ and K+ → μ+νμ

  • Absorber stops hadrons not m

  • m absorbed by rock, n → detector

18 m

5 m

Rock

30 m

Hadron Monitor

10 m

12 m

675 m

figure courtesy Ž. Pavlović

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Flux determination

Flux determination

Muon Monitors

νμ

Absorber

Decay Pipe

Horns

Target

μ+

π+

Use external hadron production data

Monitor the muon flux

18 m

5 m

Rock

30 m

Hadron Monitor

10 m

12 m

675 m

examples

Use flexible beam design, take data in special runs with different beam configurations (vary target position and horn currents)

figure courtesy Ž. Pavlović

Target at 10 cm 0 kA

Target at 250 cm 200 kA

  • Goal is better than 10% in absolute flux and 7% on shape

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


The detector

The detector

MINERA “modules”

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


A status report on the miner n a neutrino experiment

The detector (types of modules)

Inner detector

  • Target Module (5 total):

    • Layer of target material (Fe, C or Pb)

    • Layer of scintillator

  • Tracker Module(84 total):

    • 2 layersscintillator

    • 3.71 interaction lengths

  • ECal module (10 total):

    • 2 sheets of lead

    • 2 layers of scintillator

    • 8.3 rad lengths.

  • HCal module (20 total):

    • Layer of Fe

    • Layer of scintillator

    • 3.7 interaction lengths.

Outer detector – slots instrumented with scintillator (HAD calorimetry)

Lead ring on outer edge of inner detector forms an EM calorimeter

MINERvA module under construction

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


The detector1

The detector

  • MINERA received US DOE “CD-3 approval” in Nov. 2007

  • Construction of the full detector completed in spring 2010

  • He and H2O targets added in 2011 (funded by an NSF MRI)

 From NuMI

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


The detector2

The detector

  • MINERA received US DOE “CD-3 approval” in Nov. 2007

  • Construction of the full detector completed in spring 2010

  • He and H2O targets added in 2011 (funded by an NSF MRI)

Active Scintillator Modules

Tracking

Region

Liquid

Helium

Water

 From NuMI

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012

Carbon

Iron

Lead


A status report on the miner n a neutrino experiment

The detector (nuclear targets)

Water target

He target

5 Nuclear Targets

Fe Pb C

  • NUGEN MC

  • Only 

  • not acceptance corrected

  • inside fiducial volume

5 nuclear targets + water target interspersed in target region with tracking modules between

Helium target upstream of detector

Approved (for Physics) near million-event samples (41020 POT LE beam + 121020 POT in ME beam)

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Miner n a m spectrometer

MINERnAmSpectrometer

Installed and tested long ago 

(Also known as the MINOS Near Detector)

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


A status report on the miner n a neutrino experiment

Muon Detection

“MINOS-matched” muons

Energy threshold ~2 GeV.

Good angular acceptance up to scattering angles of about 10 degrees, with limit of about 20 degrees

Muons stopped in MINERnA can also be used (but no charge determination).

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


A status report on the miner n a neutrino experiment

Data in this plot constrained to have vertex in tracker or ECAL section

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Miner n a events

MINERnA Events

  • Showing X view

n QE

DIS

Anti-n QE NC

p0

D++

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Summary of detector capability

Summary of detector capability

  • Good tracking resolution (~3 mm)

  • Calorimetry for both charged particles and EM showers

  • Containment of events from neutrinos < 10 GeV (except muon)

  • Muon energy and charge measurement from MINOS

  • Particle ID from dE/dx and energy+range

    • But no charge identification except muons into MINOS

More events

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Miner n a data collection

MINERnAdata collection

“special runs” in differing beam configurations to help with flux uncertainties

MINERA has been running with high efficiency and collected data in both the neutrino and antineutrino (LE) mode

Less than 100 dead channels out of 32k channels

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Cc sample

CC Sample

  • Approved for4 × 1020 POT LE beam12 × 1020 POT ME beam

    0.9 x 1020 special runs

    Actual exposures may vary

  • Yield: ~14M (CC events)

    9M in scintillator

NuMI Low Energy Beam

(neutrinos)

Quasi-elastic

Resonance production

Resonance to DIS transition region

DIS Low Q2 region and structure functions

Coherent Pion Production

charm / strange production

0.8 M

1.7 M

2.1 M

4.3 M

CC 89k, NC 44k

230 k

  • MC (assumes all )

  • not acceptance corrected

  • inside fiducial volume

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Anti n inclusive cc data

Anti-n Inclusive CC Data

  • Track in MINERnA which matches a track in MINOS, this imposes few GeV cut

    • Require inside fiducial volume

    • X Y vertex distribution

    • Momentum from MINOS + dE/dxin MINERnA

Preliminary

preliminary

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Distributions in anti n b eam anti n cc data vs mc

Distributions in Anti-n BeamAnti-n CC, Data vs MC

  • 4.04 × 1019 POT in anti-n mode

  • MC generator GENIE v 2.6.0

    • GEANT4 detector simulation

    • 2 × 1019 POT MC , LE Beam MC anti-n flux, untuned

    • Area normalized

  • Require reconstructed muon in MINOS

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Distributions in anti n b eam n cc data vs mc

Distributions in Anti-n Beam n CC, Data vs MC

  • n Distributions same conditions as before

  • Very good agreement between Data and MC (out of the box)

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Miner n a test beam

MINERnA Test Beam

Steel Absorber

Lead Absorber

Scintillator Plane

  • In order to make precise measurements we need a precise low energy calibration

  • 40 planes, XUXV,1.07 m square

  • Reconfigurable can change the absorber configuration. Plane configurations:

    • 20ECAL-20HCAL

    • 20Tracker-20ECAL

  • Test beam has 0.4 to 1.2 GeVpions for LE hadron calibration

  • Am told test beam is available if needed

p

PMT box

Front End

Electronics

MINERA test beam run in June-July, 2010

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


A status report on the miner n a neutrino experiment

16 GeVpion beam on copper target


Test beam p

Test Beam p

  • 20 ECAL 20 HCAL configuration

  • 1.35 GeV interacting in HCAL

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Miner n a test beam1

MINERnA Test Beam

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


A status report on the miner n a neutrino experiment

  • Preliminary studies of n CCQE events

  • Recent MiniBooNE data for QE scattering on carbon appears inconsistent with NOMAD data

  • MiniBooNE is about 30% higher than expected, and MA for best fit differs substantially from that for NOMAD.

Figures from Bodek, Budd, and Christy, Eur. Phys. Jour. C 71 (2011) 1726.

QE +np-nh random phase approx. meson exchange current model, Martini et al., Phys. Rev. C 80:065501, 2009 and Phys. Rev. C81:045502, 2010

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


A status report on the miner n a neutrino experiment

Event Selection for n QE

Require 1 positive MINOS-matched muon in the event

Recoil energy is nominally Q2/2mprot – require recoil energy to be less than this value.

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


A status report on the miner n a neutrino experiment

 QE candidates

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Ccqe results

 CCQE results

  • Inferred antineutrino energy spectrum

  • Assumes QE kinematics (and nucleons at rest)


A status report on the miner n a neutrino experiment

Inclusive CC cross-section ratios

  • First step in studies with nuclear targets: inclusive cross section ratios of various nuclei.

  • Ratio depends both on the relative neutron to proton cross section, and possible nuclear modifications to the total cross section.

  • Expected ratios per kg for En > 2 GeV

  • Pb/Fe = 1.04, Pb/CH = 1.10, Fe/CH = 1.05

  • Analysis shown here done with neutrino data, on most downstream Pb/Fe target


A status report on the miner n a neutrino experiment

Inclusive CC cross-section ratios

Require:

1 muon track, matched to a negative charge MINOS track

Z position of muon vertex in nuclear target/first module downstream of target

Fiducial cut on muon vertex

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


A status report on the miner n a neutrino experiment

Inclusive CC cross-section ratios

Backgrounds originate from neutrino interactions in scintillator upstream and downstream of the target

Use active plastic scintillator reference target for background, acceptance studies

MC: 11.2e20 POT

Data: 9.1e19 POT

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


A status report on the miner n a neutrino experiment

Inclusive CC cross-section ratios

Discrepancies between data and MC result primarily from untuned flux model

MC: 11.2e20 POT

Data: 9.1e19 POT

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Miner a schedule

MINERA Schedule

  • Downstream half of detector installed Nov 2009 – began running with anti-neutrinos

    • Low energy beam – average energy ~4 GeV

  • Detector completed March 2010, began running with neutrinos

    • Low energy beam – will run until spring 2012

    • 4x1020 POT

  • Spring 2012- spring 2013 – shutdown for NuMI upgrade for NOvA

  • 2013-2016 continued neutrino running

    • Medium energy beam – average energy ~8 GeV

    • 12x1020 POT

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


Summary

Summary

  • MINERA is a high statistics, high-resolution neutrino experiment in the NuMI beam at Fermilab

  • MINERnA began data taking with a partially complete detector in October 2009, and with the full detector in March 2010.

  • Detector is working well.

  • Initial data analysis of inclusive cross sections gives Fe/Pb ratio roughly within expectations

  • Initial measurement of QE shape generally as expected with MA of 0.99.

  • Many more results coming soon …

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


A status report on the miner n a neutrino experiment

  • MINERA analysisprojects underway

  • Incomplete and may change … but gives you an idea of what’s to come. Many other topics on our “ToDo” list. Fun for years to come …

  • CCQE in plastic (carbon) and nuclear targets, d/dQ2

  • Nuclear target cross section ratios

  • NC elastic production

  • CC o production

  • NC and CC coherent charged and neutral  production

  • Beam flux

  • e content of NuMI beam

  • e – electron scattering

  • e production at low energy

  • Exclusive, inclusive, and coherent  production in plastic and nuclear targets

  • CC inclusive cross section (plastic and nuclear targets)

HEP 2012, Valparaiso, Chile, Jan. 4-10, 2012


A status report on the miner n a neutrino experiment

Backup slides


A status report on the miner n a neutrino experiment

The MINERnA Collaboration


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