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Baseline Optimization Studies D. Reyna Argonne National Lab Some Basic Questions Does sensitivity to θ 13 survive under complete 3 flavor mixing? How can we best use all of the information in the energy spectrum? What are the optimal locations for 2 identical detectors?

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baseline optimization studies

Baseline Optimization Studies

D. Reyna

Argonne National Lab

some basic questions
Some Basic Questions
  • Does sensitivity to θ13 survive under complete 3 flavor mixing?
  • How can we best use all of the information in the energy spectrum?
  • What are the optimal locations for 2 identical detectors?
  • Bottom line: Can we achieve the desired sensitivity?

D. Reyna – Argonne National Lab

independence of m 2
Independence of ∆m2

solar

atmospheric

D. Reyna – Argonne National Lab

total rate vs baseline
Total Rate vs. Baseline

Eν= 3.5 MeV

Full Reactor

Spectrum

D. Reyna – Argonne National Lab

shape comparison
Shape Comparison

Make 2

Comparison

Of

Distributions

100 m

1 km

  • Each bin normalized to total at that location
  • Errors are statistical only

D. Reyna – Argonne National Lab

2 comparisons
Shape Test:
  • Minimizes Detector Specific Systematics
  • Loss of overall rate information
2 Comparisons

Combined:

  • Assumes Identical Detectors
  • More Statistical Power

D. Reyna – Argonne National Lab

optimizing 2 locations
0.0015

0.002

0.0025

0.003

0.0035

Optimizing 2 Locations
  • 2 Identical Detectors
  • Fix 1 Detector Baseline
  • Sweep the Other

D. Reyna – Argonne National Lab

optimizing 2 locations cont d
Optimizing 2 Locations (cont’d)

100m

1km

500m

1.5km

2km

D. Reyna – Argonne National Lab

statistical power of combined 2 test
Statistical Power of Combined 2 Test

Combined (stat only)

Combined (+ 1% sys)

Shape Only (stat only)

Shape Only (+ 1% sys)

D. Reyna – Argonne National Lab

secondary maxima
Secondary Maxima?

Combined (stat only)

Combined (+ 1% sys)

Shape Only (stat only)

Shape Only (+ 1% sys)

D. Reyna – Argonne National Lab

90 confidence limits
90% Confidence Limits

D. Reyna – Argonne National Lab

short and long solutions
Short and Long Solutions

D. Reyna – Argonne National Lab

final thoughts
Final Thoughts
  • It is possible to get the desired sensitivity
  • Optimal near detector location should be as close as possible
  • A Detector should be at the first oscillation minimum (900 – 1400m)
  • A farther location (~2.5km) yields almost as much statistical power
    • Could be effective if a very near detector is not possible
    • Possible 3rd detector?

D. Reyna – Argonne National Lab

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