WG1 SummaryNuFact03 , June 11, 2003

1

NuFact 03 WG1 Summary

Future ExperimentsG. Feldman Progress report from NUMI off-axis

R. Bernstein Independent study of NUMI off-axis sensitivity

K. Kodama Progress report on CNGS and Opera/Icarus 　

Y. Obayashi JHF progress report and θ13 sensitivity

J. Burguet- JHF intermediate detector

Castell

S. Kahn BNL/Homestake proposal

G. Rajasekaran A large iron detector for the neutrino factory

Y. Efremenko A long-baseline experiment in the IHEP tunnel

WG1 SummaryNuFact03 , June 11, 2003

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NuFact 03 WG1 Summary

Future ExperimentsLBL; approved, ongoing

K. Kodama Progress report on CNGS and Opera(/Icarus)

LBL; proposed, realistically studied

Y. Obayashi JHF progress report and θ13 sensitivity

J. Burguet- JHF intermediate detector

Castell

G. Feldman Progress report from NUMI off-axis

R. Bernstein Independent study of NUMI off-axis sensitivity

VLBL; conventional beam

S. Kahn BNL/Homestake proposal

Y. Efremenko A long-baseline experiment in the IHEP tunnel

VLBL; neutrino factory

G. Rajasekaran A large iron detector for the neutrino factory

WG1 SummaryNuFact03 , June 11, 2003

•CNGS: First beam to Gran Sasso: May, 2006

•OPERAEmulsion delivery to Gran Sasso starts

in August 2003Run from Day 1Emulsion analysis for event location

must be ready before Day 1Rehearsal for event location using

“mini-OPERA” at KEK-PS in 2004

•ICARUS (A. Rubbia, plenary talk)T600 installation at CNGS has been

approved in March 2003.Transported and installed in 2003-2004. T3000 = T600 + T1200 + T1200

WG1 SummaryNuFact03 , June 11, 2003

JHF-Kamioka Neutrino Experiment

~1GeV νννν beamKamiokaJ-PARC(Tokai)

0.75MW 50 GeV PS

( conventional νννν beam)

Super-K: 22.5 kt

Plan to start in 2007

Hyper-K: 1000 kt

4 MW 50 GeV PS

Y. Obayashi

WG1 SummaryNuFact03 , June 11, 2003

Neutrino BeamlineTransport line(Super-cond. Mag.)

Target station

Decay volume130m

Off-axis

Design in progress.

Budget request submitted.

Will be ready to start construction in 2004.

WG1 SummaryNuFact03 , June 11, 2003

Jun. 9, 2003 Y. OBAYASHI @ NuFact 03, Columbia Univ., New York 13

Detectors

Muon monitors @ ~140mFast (spill-by-spill) monitoring of beam direction/intensity

First Near detector @280mNeutrino intensity/spectrum/direction

Second Near Detector @ ~2kmAlmost same Eνννν spectrum as for SKWater Cherenkov can work

Realistic sensitivity studies and detector design studies started.

0

200

400

600

800

1000

1200

1400

1600

1800

x 10 3

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

Eν (GeV)

1.5km

295km

0.28km

Neutrino spectra at diff. dist

dominant syst. in K2K

p ππππ νννν

140m0m 280m 2 km 295 km

Role of the 2 km intermediate detector studied by Burguet-Castell: It will drastically simplify the systematic error analysis.

WG1 SummaryNuFact03 , June 11, 2003

There are some other longer baseline sites up to ～～～～950 km.

NuMI off-axisG. Feldman

WG1 SummaryNuFact03 , June 11, 2003

Active elements: scintillators or RPCs considered

Absorber: consensus to use particle board

WG1 SummaryNuFact03 , June 11, 2003

NuMI off-axis•LOI submitted August 2002 (P929)•Intention to submit proposal to November 2003 PAC•50 kton, 5 yr, 4××××1020 pot/yr

WG1 SummaryNuFact03 , June 11, 2003

R. Bernstein•Simulation studies of NuMI off-axis

•For ννννe appearance, simulated LAr and Fe/Scint, 100 kt/yr.

•Can see effects down to sin22θθθθ=0.01.

•LAr much better

WG1 SummaryNuFact03 , June 11, 2003

BNL →→→→ Homestake Super Neutrino Beam

2540 km

Homestake BNL

28 GeV protons, 1 MW beam power500 kT Water Cherenkov detector5×107 sec of running, Conventional Horn based beam

S. Kahn

WG1 SummaryNuFact03 , June 11, 2003

ννννe Appearance Measurements• a direct measurement of the

appearance of ννννµµµµ→→→→ννννe is important;the VLB method competes well withany proposed super beam concept

• for values > 0.01, a measurementof sin22θθθθ13 can be made (thecurrent experimental limit is 0.12)

• for most of the possible range ofsin22θθθθ13, a good measurement of θθθθ13 and the CP-violation parameterδδδδCP can be made by the VLB experimental method

νe APPEARANCE

0

20

40

60

80

100

0 1 2 3 4 5 6 7 8 9 10

Reconstructed ν Energy (GeV)

Eve

nts

/bin

BNL-HS 2540 kmsin22θij (12,23,13) = 0.86/1.0/0.04∆mij

2 (21,32) = 7.3e-5/2.5e-3 eV2

1 MW, 0.5 MT, 5e7 sec

CP 135o: 591 evts

CP 45o: 449 evts

CP -45o: 300 evts

Tot Backg.: 146 evts

νe Backg.: 70 evts

DISCUSSION•1-ring QE event selection above a few GeV suffers from more BG.•More realistic BG estimation suggested.

WG1 SummaryNuFact03 , June 11, 2003

5.1 km

ConceptConceptConceptConceptMeasurement of Measurement of Measurement of Measurement of ννννµµµµ disappearance with a very large baselinedisappearance with a very large baselinedisappearance with a very large baselinedisappearance with a very large baseline

• UNK tunnel - huge scintillator based muon counter (not calorimeter !)• Surrounding soil is a neutrino target• TOF and segmentation gives direction to the neutrino source• Location at 50 m underground gives good cosmic ray background suppression• Energy scan with Narrow Band neutrino beam to see oscillation pattern

UNK tunnel(Left from terminated accelerator

project at the IHEP, Protvino, Russia)

Y. Efremenko

～～～～1 Mton　　　　

Fermilab ～～～～7600 kmJHF ～～～～7000 kmGSI ～～～～2000 km

WG1 SummaryNuFact03 , June 11, 2003

For ∆∆∆∆matm2 in the range of

1.5 10-3 ev2 < ∆∆∆∆m2 < 4.0 10-3 ev2

Expected accuracy in parameters measurementsFor GSI: σσσσ∆∆∆∆m2 = 2.7⋅⋅⋅⋅10-5 ev2 , σσσσSin22θθθθ = 0.01 For JHF: σσσσ∆∆∆∆m2 = 1.5⋅⋅⋅⋅10-5 ev2 , σσσσ Sin22θθθθ = 0.01

This is ~1% error !!!

If we can do the same for antineutrinos say with 2% accuracy, then:

Test of CTP on the 3% level by compare ∆∆∆∆m2 for neutrinos with∆∆∆∆m2 for antineutrinos

Sensitivity to matter effects on the 3% levelFor ∆µ∆µ∆µ∆µ = P(ννννµµµµ ) -- P(anti-ννννµµµµ )

Expected SensitivityExpected SensitivityExpected SensitivityExpected Sensitivity

WG1 SummaryNuFact03 , June 11, 2003

Detector: 30 kt magnetized iron calorimeter

Phase 1: atmospheric neutrino measurements

Phase 2: far detector for a neutrino factory experiment

WG1 SummaryNuFact03 , June 11, 2003

CERN

Fermilab

JHF

WG1 SummaryNuFact03 , June 11, 2003

(“super-beam”) LBL experiments

0.2%

0.4%

0.5%

0.5%

0.2%

0.2%0.2%0.2%0.2%

0.8%

1.2%

~1%

νe@peak

~4,000?20kt?730?~2OA1.2120OA-NuMI2

~400

650(0)

~1,000?

~2,500?

~600,000

~3,000~3,000~3,000~3,000

~5,000

~2,500

~50

νµCC(/yr)

1,0002950.7OA450JHF-HK

1,000?2,500?~1WB/OA

1.328AGS ??

1,000?~12000.8OA0.3400OA-CNGS

40(400)1300.26WB42.2SPL-Furejus

50kt?730?~2OA0.4120OA-NuMI

22.522.522.522.5

~2

5.4

22.5

Mdet

(kt)

295295295295

732

730

250

L(km)

〈Eνννν〉

(GeV)Beam

Power

(MW)Ep

(GeV)

0.70.70.70.7OAOAOAOA0.750.750.750.7550505050JHFJHFJHFJHF----SKSKSKSK

18WB0.3400CNGS

3.5WB0.41120MINOS(LE)

1.3WB0.00512K2K

T. Kobayashi, NuFact 02 (with modification for OA-NuMI)

WG1 SummaryNuFact03 , June 11, 2003

Future Experiments: Summary

CNGS: First beam May 2006

OPERA: Preparing for Day 1

ICARUS: T600 installation in Gran Sasso 2003 - 2004

JHF: Ready to start construction in 2004

NuMI off-axis: Detector choice advanced,

Proposal November 2003

BNL/Homestake: Realistic BG estimate suggested

IHEP, INO detectors: New comers welcome,

Realistic sensitivity studies encouraged