Neutrino Scattering in the NuMI Beam 1 MINER A (Main INjector ExpeRiment v-A) A High-Statistics Neutrino Scattering Experiment Using an On-Axis, Fine-grained

Neutrino Scattering in the NuMI Beam1

MINERA (Main INjector ExpeRiment v-A)

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

in the NuMI Beam

Argonne - Athens - California/Irvine - Colorado - Dortmund - Duke - Fermilab - Hampton - I I T - INR/Moscow -James Madison - Jefferson Lab

Minnesota - Pittsburgh - Rochester - Rutgers - South Carolina - Tufts18 Groups: Red = HEP, Blue = NP, Green = Theorists only

Jorge G. Morfín - Fermilab

CERN17 September 2003


52 Collaborators (so far…)

J.Arrington, D.H.Potterveld, P.E.ReimerArgonne National Laboratory, Argonne, Illinois

C.Andreopoulos, G.Mavromanolakis, P.Stamoulis, N.Saoulidou, G.Tzanakos, M.Zois

University of Athens, Athens, Greece

D.CasperUniversity of California, Irvine, California

E.R.KinneyUniversity of Colorado, Boulder, Colorado

E. PaschosUniversity of Dortmund, Dortmund, Germany

D.DuttaDuke University, Durham, North Carolina

D.Harris, M. Kostin, J.G.Morfin, P.ShanahanFermi National Accelerator Laboratory, Batavia, Illinois

M.E.ChristyHampton University, Hampton, Virginia

N.SolomeyIllinois Institute of Technology, Chicago, Illinois

S. KulaginInstitute of Nuclear Research, Moscow, Russia

I.NiculescuJames Madison University, Harrisonburg, Virginia

A.Bruell, R. Carlini, R.Ent, D.Gaskell, J. Gomez, C.E.Keppel. W.Melnitchouk, S.Wood

Jefferson Lab, Newport News, Virginia

M.DuVernoisUniversity of Minnesota, Minneapolis, Minnesota

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

A.Bodek, H. Budd, P. de Babaro, G. Ginther, S, Manly, K. McFarland, W. Sakumoto, P. Slattery, M. Zielinsky

University of Rochester, Rochester, New York

R.Gilman, C.Glasshausser, R.RansomeRutgers University, New Brunswick, New Jersey

T.Bergfeld, A.Godley, S.R.Mishra, C.RosenfeldUniversity of South Carolina, Columbia, South Carolina

H.Gallagher, W.A.MannTufts University, Medford, Massachusetts


For more information…

For more details than time this morning allows -

Salle B14:00


MOTIVATION

Why, after nearly 40 years ofaccelerator experimentation,

as we are pushing the energy frontier,are we still interested in lower energy

scattering physics?


NuMI Beamline on the Fermilab Site


Det. 2

Det. 1

Far Detector: 5400 tons. O(2Kevts/year) Finished!NuMI: Neutrinos at Main Injector

120 GeV protons1.9 second cycle time

Single turn extraction (10s)Beam: POT Late 2004

Precision examination of atmospheric anomaly Energy distribution of oscillations

Measurement of oscillation parameters Participation of neutrino flavors

Direct measurement of vs oscillation Magnetized far detector: atm. ’s. Likely eventual measurement with beam

NuMI Facility / MINOS Experiment at Fermilab

Near Detector 980 tons


NuMI Beamline Geometry

Target-Horn Chase: 2 parabolic horns. 50 m Decay Region: 1m radius decay pipe. 675 m Hadron Absorber: Steel with Al core 5 m Muon range-out: dolomite (rock). 240 m Near Detector Hall 45 m


NuMI Neutrino Beam (zoom-lens) Configurations

Horn 1 position fixed - move target and horn 2 to change mean energy of beam. Three “nominal” configurations: low-, medium-, high energy. In addition, “semi-me” and “semi-he” beams. Horns left in le configuration and

only target moved.


NuMI Neutrino Spectrum

CC Events/kt/year

Use LOW ENERGY Beam


How Important are Low-energy Neutrinos?

Seeing the “dip” in the oscillation probability is

a goal of MINOS

VERY Difficult at low m2.

• CC energy distributions have two important complications at low energy:• Difference between Evis and E due to nuclear effects (particularly re-scattering). • A required subtraction of NC events that fake low energy CC.

• In both cases MINOS, as well as all other oscillation experiments, will have to rely on MC.


The dominant oscillation parameters will be known reasonably well from solar/reactor and from SuperK, K2K, MINOS, CNGS

The physics issues to be investigated are clearly delineated: Need measurement of missing oscillation probability (13 = e)

Need determination of mass hierarchy (sign of m13)

Search for CP violation in neutrino sector Measurement of CP violation parameters (Testing CPT with high precision)

Above can be accomplished with the e transition.

How do we measure this sub-dominant oscillation? 13 small (≤ 0.1) - maximize flux at the desired energy (near oscillation max)

Minimize backgrounds - narrow energy spectrum around desired energy One wants to be below threshold to measure subdominant oscillation

Next Generation: NuMI Off-axis Experiment


More flux than low energy on-axis (broader spectrum of pions contributing)

Neutrino event spectra at a detector

located at different transverse locations

No nasty high-energy tail, which contributes so much background!

The Off-axis Solution


MINOS: Neutrino Beam NuMI Off-axis Neutrino Beam

We need to understand low energy -Nucleus interactions

for oscillation experiments!

Motivation: Current/Future Oscillation Experiments use a Few GeV on a C, O2,Fe or ??? Nucleus


Motivation: Exclusive Cross-sections at Low Energies - Quasi-elastic: DISMAL

No one ever lost money by betting against neutrino experiments being correct. -- Don Perkins

World sample statistics is still fairly miserable! Cross-section important for understanding low-energy atmospheric neutrino

oscillation results. Needed for all low energy neutrino monte carlos. “K2K near detector data on water was fit with wrong vector form factors. New

(Budd, Bodek, Arrington ) BBA2003 form factors and updated MA have a significant effect on Neutrino oscillations Results.” Quote from Arie Bodek


n–p0

n–n+

p–p+

World’s sample of NC 1- ANL

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

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

K2K 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: Exclusive Cross-sections at Low Energies -1-Pion and Strange Particle: DISMAL


How about Tot?

Low energy (< 10 GeV) primarily from the 70’s and 80’s suffering from low statistics and large systematics (mainly from flux measurements).

Mainly bubble chamber results --> larger correction for missing neutrals.

How well do we model Tot?

D. Naples - NuInt02


F2 / nucleon changes as a function of A. Measured (with high statistics) in -A not in Good reason to consider nuclear effects DIFFERENT in -A. Presence of axial-

vector current. SPECULATION: Much stronger shadowing for -A but somewhat weaker “EMC” effect? Different nuclear effects for valance and sea --> different shadowing for xF 3 compared to F2? Different nuclear effects for d and u quarks?

NUCLEAR EFFECTS EXPLAIN SOME/ALL OF THE NuTeV SIN2W RESULT?

LET’S MEASURE NC/CC AND NUCLEAR EFFECTS WITH

Shadowing

Anti-shadowing

“EMC” effect

Fermi motion

Motivation: Knowledge of Nuclear Effects with Neutrinos: essentially NON-EXISTENT


Motivation: Nuclear Effects A Difference in Nuclear Effects of Valence and Sea Quarks?

Nuclear effects similar in Drell-Yan and DIS for x < 0.1. Then no “anti-shadowing” in D-Y while “anti-shadowing” seen in DIS (5-8% effect in NMC). Indication of difference in nuclear effects between valence & sea quarks?

This quantified via Nuclear Parton Distribution Functions: K.J. Eskola et al and S. Kumano et al


•S.A.Kulagin has calculated shadowing for F2 and xF3 in -A interactions. Stronger effect than for -A interactions

•Shadowing in the low Q2 (A/VMD dominance) region is much stronger than at higher Q2.

•Major difference between Kulagin and Kumano predictions

-Ca/-D

Motivation: Nuclear EffectsA Specific Look at Scattering Nuclear Effects: Shadowing

Kumano


Experimental Results in Scattering: Nuclear Effects?

Bubble Chamber:Ne/D2

FNAL E-545

CERN BEBC

Where is the“EMC” effect?


Motivation: Comparison of -A with JLab results on e-A; high xBj pdf

Particular interest in the high -xBj region where there seems to be a discrepancy between global fits and data.

Study of structure functions off various nuclear targets, again at high-xBj, allows comparison with nuclear structure models where sensitivity is the greatest.

Close examination of the non-PQCD and pQCD transition region, in context of quark-hadron duality, with axial-vector probe.

CTEQ working group in association with C. Keppel (Jlab) formed to investigate high -xBj region.


Motivation: High xBj parton distributionsHow well do we know quarks at high-x?

Ratio of CTEQ5M (solid) and MRST2001 (dotted) to CTEQ6 for the u and d quarks at Q2 = 10 GeV2. The shaded green envelopes demonstrate the range of possible distributions from the CTEQ6 error analysis.

Wu-Ki Tung


Reasonably expect 2.5 x 1020 pot per year of NuMI running at start-up.

le-configuration: Events- (E>0.35 GeV) Epeak = 3.0 GeV, <E> = 10.2 GeV, rate = 200 K events/ton - year.

me-configuration: Events- Epeak = 7.0 GeV, <E> = 8.5 GeV, rate = 675 K events/ton - year s-me rate = 540 K events/ton - year.

he-configuration: Events- Epeak = 12.0 GeV, <E> = 13.5 GeV, rate = 1575 K events/ton - year s-he rate

= 1210 K events/ton - year.

We have the Motivation. Can we perform the experiment?Neutrino Event Energy Distributions and Statistics in the NuMI Near Hall

With E-907 at Fermilab to measure particlespectra from the NuMI target, expect to know

neutrino flux to ≈ ± 3%.


MINOS oscillation experiment uses mainly le beam with shorter s-me and s-he runs for control and minimization of systematics.

An example of a running cycle would be: 12 months le beam 3 months s-me beam 1 month s-he beam

Consider 2 such cycles (3 year run) with 2.5x1020 protons/year: 860 K events/ton. <E> = 10.5 GeV

DIS (W > 2 GeV, Q2 > 1.0 GeV2): 0.36 M events / ton Quasi elastic: 0.14 M events / ton. Resonance + “Transition”: 0.36 M events /

ton - 1 production: 0.15 M events / ton.

MINOS Parasitic Running: Statistics & Topologies


Events / ton

elastic+

resonance

MINOS Parasitic Running: x, Q2 and W2


Run he beam configuration! <E> = 13.5

GeV For example, 1 year neutrino plus

2 years anti-neutrino would yield:1.6 M - events/ton

0.9 M - events/ton

DIS (W > 2 GeV, Q2 > 1.0 GeV2): 0.85 M events / ton

0.35 M events / ton

Shadowing region (x < 0.1):0.3 M events/ton

Prime User: he Event Energy Distribution


Detector: Physics Requirements

Good separation of NC and CC events Good identification and energy measurement of - and e±

Identification and separation of exclusive final states Quasi-elastic n–p, ene–p - observe recoil protons Single 0, ± final states - reconstruct 0

Multi-particle final-state resonances

Reasonable electromagnetic and hadronic calorimetry for DIS Accurate measurements of xBj, Q2 and W.

Multiple targets of different nuclei


Basic Conceptual Design: Triangular ≈ (2-3 cm base x 1-2 cm height) scintillator (CH) strips with fiber readout. Fully

Active (int = 80 cm, X0 = 44 cm) / alternate with C planes > and nuclear tgt.

Example fid. vol: (r = .8m L = 1.5 m): 3 tons pure plastic or 5 tons with graphiteR = 1.5 m - p: =.45 GeV/c, = .51, K = .86, P = 1.2R = .75 m - p: =.29 GeV/c, = .32, K = .62, P = .93

Surround fully active detector with em-calorimeter, hadron-calorimeter and magnetized -id / spectrometer

Nuclear targets: 1 cm thick planes of C, Fe and Pb.- Total mass 2 tons 44 planes C: graphite planes +Scintillator 12 planes Fe: backscatter hadron cal 8 planes Pb:

Use MINOS near detector as forward identifier / spectrometer.

Attempt to constrain detector size so can be moved to an off-axis position.


Basic Conceptual Design: (A. Bodek, D. Casper and G. Tzanakos)

Overall dimensions and relative volumes currently being determined

X

UV

V U X

15 mm

2mm

EM Calorimeter:

2 mm = 1.5 mm Pb and two 0.25 mm stainless on each side

MagentizedHadron Cal + Id/spec.

Coils - bottom sides only

Active Scintillator /Graphite detector

Downstream end:EM Calorimeterplus HadCal

FiducialVolume


Downstream End - just upstream of MINOSnear

2.0 m x 2.0 m x 2.0 m long

Scintillator Only

Scint. + Planes of C, Fe,W

Upstream Half

Downstream Half


Scintillation detector work at FermilabScintillation Detector Development Laboratory

Extruded scintillatorFiber characterization and test

Thin-Film facilityFiber processing: Mirroring and coatingsPhotocathode workDiamond polishing

Machine DevelopmentDiamond polishingOptical connector developmentHigh-density Photodetector packaging

Polymer Dopant

Scintillator Cost < $ 5 / kg

Continuing development of D0 VLPC readout with $750K grant.Produced D0-type arrays for detailed device analysis at low cost compared to D0Goal: Demonstrate X10 cost reduction

for VLPC.

Why plastic scintillator with fiber?Scintillator/Fiber & VLPC R&D at Fermilab


Example of Event Profiles in Scintillator Detector S. Boyd and D. Casper

CC: E = 4.04 GeV, x = .43, y = .37

“Elastic”: E = 3.3 GeV, x = .90, y = .08

CC: E = 11.51 GeV, x = ..34, y = .94

NC: E = 29.3 GeV, x = ..25, y = .46


Read-out/Photo-Sensors to ConsiderH. Budd - coordinator

MAPMTs - very safe - currently most favored solution Well-understood technology, know draw-

backs, stable development Relatively low QE Not too pricey for M-64

(MINOS price order $20/channel) Electronics cost: less than MINOS (no QIE chip)

CCD + I I - relatively inexpensive Commercial off-the-shelf with integrated readout -

inexpensive/channel Relatively low QE Slow device - no intra-spill timing


Read-out/Photo-Sensors to Consider - continued

VLPC - “Cool” Devices Not yet commercial but intense R&D development For D0 cost order $50/channel -

Bross speculates $10/channel “soon” High QE Requires cryogenic cooling to reduce noise -

system integration task

HPD and APD - Becoming commercial High QE but low gain Need high-gain electronics and some significant cooling (not like VLPC) Less pricey than MAPMT but electronics could cost a bundle Still need several years R&D

•+ •-

IntrinsicRegion

GainRegion

DriftRegionSpacer

Region

Photon

•e•h

Substrate


NuMI Near Hall: Dimensions & Geometry

≈ 100 m undergroundLength: 45m - Height: 9.6m - Width: 9.5m

Length Available for New Detector: 26 m


Center of the NuMINeutrino Beam

2 m x 2m detectorcross-section

MINOS Near Detector in the NuMI Near Hall1cm thick CH (4 cm transverse granularity) between 2.5 cm thick Fe plates

Even “Partially Instrumented” MINOS planes provide fairly complete coverage for the new detector

Plastic & Steel


Many Detector Questions Still Unanswered(aside from fundamental question of readout/electronics choice)

We have a detector with sufficient granularity to resolve 1, 2, 3… particle final states. How do we determine the mass and momentum of these particles?

How much can we do without a central magnetic field? - We can measure stopping proton energy by range. What about the ±/K±/P ambiguity? Can we see the pion decay? How much does de/dx in the last few cms of track help resolve /P ambiguity?. If we need a B-field would the first 20 planes of MINOS do?

Will a TOF system help the particle ID? - can we resolve the +/-- ambiguity via observation of the +/e+ chain? Can we use the MINOS detector to resolve +/-- ambiguity? Can we measure the charge and momentum in MINOS? How well do we measure the 1 0- state?

How does the plastic perform as an hadronic calorimeter? What is the error on the hadronic energy?


Other Detectors with Similar Concept

2 cm1cm

3m

3m

EOI for an Off-axis Near Detector.2 cm x 2cm granularity

EOI for a nearerMiniBooNe Detector.

Similar detector and granularity

New K2K NearDetector


H_2/D_2

MINOS Near

Fid. vol: r = 80 cm. l = 150 cm.

350 K CC evts in LH2 800 K CC evts in LD2 per year he- running.

Technically easy/inexpensive to build

and operate.

Meeting safety specifications the major

effort.

Planes of C, Fe, PbFor part of run

After initial (MINOS) run -add a Liquid H2/D2(/O/Ar) Target


Event rates (2.5 x 1020 protons per year)

MINOS Off-axis Prime User Prime User Parasitic Parasitic

(3 years) (1 year, me- ) (1 year, he-) (2 year, he -)

CH 2.60 M 2.10 M 4.80 M 2.70 M

C 0.85 M 0.70 M 1.60 M 0.90 M

Fe 0.85 M 0.70 M 1.60 M 0.90 M

Pb 0.85 M 0.70 M 1.60 M 0.90 M

LH2 0.15 M 0.35 M 0.20 M

LD2 0.35 M 0.80 M 0.45 M

Detector (3 ton fid. vol. ): Event Rates; CC - E > 0.35 GeV


Measure during initial MINOS exposure Quasi-elastic neutrino scattering and associated form-factors. ( Contribution of the strange quark to proton spin through elastic scattering. ) Resonance production region. Nuclear effects involving neutrinos, including NC/CC ratio.

Need antineutrinos for (maximal) physics output sin2W via the ratio of NC / CC (as well as d/dy from -e scattering) to check the surprising NuTeV

result. Very high-x parton distribution functions. Nuclear effects for valence and sea quarks. Parton distribution functions (pdf) via all 6 structure functions. Leading exponential contributions of pQCD. Charm physics including the mass of the charm quark mc (improved accuracy by an order

of magnitude, Vcd, s(x) and, independently, s(x.).

Strange particle production for Vus, flavor-changing neutral currents and measurements of hyperon polarization.

-Scattering Physics Topics with NuMI Beam Energies and Statistics


Measure absolute el and ie 1 to ± 3% (Beam) ± Expt. Systematic: Minimal statistical errors (> 400K events each elastic and 1).

In the 2-year run, this experiment would accumulate:

430 K events in CH, 145 K in C/Fe/Pb and 90 K in D2.

Could also search for or measure

Physics Result: Exclusive States; - Elastic and Resonance Cross-sections and Strange Particle Production


Physics with the Elastic Scattering Sample> 400,000 events produced

R. Holt - ANL

Q2<0.3 Region, Interest

1. Determine Ma=radius of axial proton

2. Compare to Ma from pion electroproduction

3. Determine quaielastic cross section where most of the events are - for neutrino oscillation in the 1 GeV region , e.g. K2K,JHF MiniBoone.

4. Sensitive to both Pauli Exclusion and final state ID if a nuclear target is used, e.g. Carbon, Water. Lose Quasielastic events, or misID resonance events. -> - Need to use Jlab Hall B data on D2, C and Fe - Manly Analysis proposal

5. Low recoil proton momentum P=Sqrt(Q2)

Q2 > 1 GeV2 Region, Interest

1. Determine deviations from Dipole form factors is it like Gep or Gmp .

2. Not sensitive to Paul Exclusion, but sensitive to final state ID. -> - Need to use Jlab Hall B data on D2, C and Fe - Manly analysis proposal

3. Higher recoil proton momentum P=Sqrt(Q2)


Physics with the Resonance (+ Transition Region) Scattering Sample: > 1,000,000 events (400 K 1)produced


Coherent Pion Production

0

N N

P

Z

Order 200K NC coherent pion eventsduring MINOS parasitic run


Ratio Fe/C: Statistical ErrorsFrom MINOS Parasitic Run

xBj MINOS MINOS all DIS

0.0 - .01 1.8 % xxx

.01 - .02 1.4 10 %

.02 - .03 1.3 6

.03 - .04 1.2 4

.04 - .05 1.1 3

.05 - .06 1.1 2.6

.06 - .07 1.0 2.3

.1.01.0010.5

0.6

0.7

0.8

0.9

1.0

Pb/C

Fe/C

Kulagin Predictions: Fe/C and Pb/C - ALL EVENTS - 2-cycle

x

R (A/C)

( running only)

Physics Results: Nuclear Effects

Q2 = 0.7 GeV2


The particular case of what is happening at high- xBj is currently a bit of controversial with indications that current global results not correct:

Drell-Yan production results ( E-866) may indicate that high-xBj (valence) quarks OVERESTIMATED.

A Jlab analysis of Jlab and SLAC high x DIS indicate high-xBj quarks UNDERESTIMATED

≈ Statistical Errors for 1 year of he-x 1.5 for MINOS parasitic run in CH)

xBj CH LH2 LD2

.6 - .65 0.6% 2.2% 1.5%

.65 - .7 0.7 2.6 1.7

.7 - .75 1.0 3.7 2.5

.75 - .8 1.3 5 3

.8 - .85 2 7 5

.85 - .9 3 11 7

.9 - 1.0 4 14 10

Measured / CTEQ6

CTEQ6

SLAC points

Might be d/u ratio

Physics Results: High-xBj Parton Distribution Functions


Physics Results: Parton Distribution Functions:What Can We Learn With All Six Structure Functions?

Does s = s and c = c over all x? If so.....

F 2Ν (x,Q ) =x u+ u + d+ d+ s + c[ ]

F Ν (x,Q ) =x u+ u + d+ d+s+ c[ ]

xF Ν (x,Q ) =x u+ d - u - d - s+ c[ ]

xF Ν (x,Q ) =x u+ d - u - d +s - c[ ]

F2 - xF

= u + d+ c( )=U + 4 c

F - xF

= u + d+ s( )=U + 4 s

xF - xF

= s+ s( ) − c+ c( )[ ] =4 s - 4 c

Using Leading order expressions:

Recall Neutrinoshave the ability to directly resolve flavor of the nucleon’s constituents: interacts with d, s, u, and c while interacts with u, c, d and s.


Physics Results: Six Structure Functions for Maximal Information on PDF’s

d A

dxdQ = GF

x

F A (x,Q ) + xF

A (x,Q )( ) + −y( )

F A (x,Q ) −xF

A (x,Q )( )⎡

⎣⎢⎤

⎦⎥

d

dxdQ = GF

x

F (x,Q ) −xF

(x,Q )( ) +−y( )

F (x,Q ) + xF

(x,Q )( )⎡

⎣⎢⎤

⎦⎥

,x Q , (− )y ( )G x

X = 0.1 - 0.125Q2 = 2 - 4 GeV2

Kinematic cuts in (1-y)not shown

+ y2 FL

(1-y)2

R = Rwhitlow

Neutrino1 year he-beam

Anti-Neutrino2 years he-beam


Summary - Physics of the Proposal

Quasi-elastic Reaction - (A.Bodek), H. Budd and A. Mann Precision measurement of E) and d/dQ, constrain -beam systematics Precision determination of FA

Study of nuclear effects and their A-dependence e.g. proton intra-nuclear rescattering

Resonance Production (, N*..) Exclusive channels - A. Bodek and S. Wood Precision measurement of and d/dQfor individual channels Detailed comparison with dynamic models, comparison of electro- & photo production the

resonance-DIS transition region -- duality Study of nuclear effects and their A-dependence e.g. 1 2 3 final states

Nuclear Effects - A. Bruell, J. G. Morfín and D. Naples Measure and p multiplicities as a function of E and A : convolution of quark flavor-

dependent nuclear effects and final-state intra-nuclear interactions Measure NC/CC as a function of EH off different nuclei Measure shadowing, anti-shadowing and EMC-effect as well as flavor-dependent nuclear

effects and extract nuclear parton distributions


Physics of the Proposal - continued

Total Cross-section and Structure Functions - C. Keppel and J. G. Morfín Precision measurement of low-energy total cross-section Understand resonance-DIS transition region - duality studies with neutrinos Detailed study of high-xBj region: extract pdf’s and leading exponentials

Coherent Pion Production - H. Gallagher and

Precision measurement of for NC and CC channels Measurement of A-dependence Comparison with theoretical models models

MINERA and Oscillation Physics - H. Gallagher and D. Harris MINERA measurements enable greater precision in measure of m, sin223 in MINOS MINERA measurements fundamental for 13 in MINOS and off-axis experiments MINERA measurements as foundation for measurement of possible CP and CPT

violations in the sector


Physics of the Proposal - continued

Strange and Charm Particle Production - (A. Mann), V. Paolone and N. Solomey, Exclusive channel E) precision measurements - importance for nucleon decay

background studies. Hyperon Production yielding new measurements of CKM using Exclusive charm production channels at charm threshold to constrain mc

Generalized Parton Distributions - R. Gilman, W. Melnitchouk and R. Ransome Provide unique combinations of GPDs, not accessible in electron scattering (e.g.

C-odd, or valence-only GPDs), to map out a precise 3-dimensional image of the nucleon

Provide better constraints on nucleon (nuclear) GPDs, leading to a more definitive determination of the orbital angular momentum carried by quarks and gluons in the nucleon (nucleus)

provide constraints on axial form factors, including transition nucleon --> N* form factors


Rough Costs

Scintillator (3m x 3m, 20 K channels) $100 - $200 K Fibers (20 K channels) $100 K Steel for ID/spectrometer (40 cm thick) $50 K MAPMT - M64

Per channel tube ($15) $300K Electronics $75/channel $1,500 K

SUM $1,800 K

SUM ≈ $2.1 M + construction and installation costs

≈ $ 5.0 M


Response of the Fermilab PAC to EOI

We are “encouraged” to continue developing the physics, detector and collaboration in order to submit a formal Proposal.

An indication (quantitative) of how these results would aid neutrino oscillation experiments would be welcome.

A combined R&D program (representing the multiple EOIs) for detector + readout technology is encouraged.

ON SCHEDULE TO HAVE A COMPLETE PROPOSAL READY TO SUBMIT TO THE PAC BY THIS NOVEMBER.


NuMI Beam is Intense and the ideal (perhaps only) place to do these measurements: yielding ≈ 860 K events/ton during MINOS approved run* yielding ≈ 1.6 M events/ton-year in the he-mode and 0.7 M events/ton-year in the me-mode.

NuMI Near Hall: Plenty of space for new detector(s) in a fully outfitted experimental hall

NuMI Scattering Physics:

As just outlined. NuMI Scattering Detector studies underway, phased installation:

“solid scintillator” + planes of various A: 3 - 4 ton fiducial volume Plenty of Questions still to be answered liquid H2 / D2 (/O/Ar): large target technically no challenge

Preliminary costing suggests an experiment costing O($5M) ! Real and growing interest from both the NP and HEP communities. A very encouraging response from the Fermilab PAC to produce a formal Proposal!

Proposal preparation underway with goal of submitting to PAC November 2003

Conclusions: NuMI Scattering Experiment


INVITATION!

JOIN THEFERMILAB

NEUTRINO PROGRAM!!

Documents

Neutrino Scattering in the NuMI Beam 1 MINER A (Main INjector ExpeRiment v-A) A High-Statistics Neutrino Scattering Experiment Using an On-Axis, Fine-grained