CovMatrix_Gen.md

Systematics table

• Background Norm
• Non linearity
• [](##Cherenkov contribution)
• [](##Energy Scale)
• [](##Energy Resolution)
• [](##Energy Loss)
• [](##Background Scaling)
• [](##Segment to Segment Volume)
• [](##Segment to Segment efficiency)
• [](##Segment to Segment energy Scale)
• [](##Segment to Segment energy resolution)
• [](##Segment to Segment energy loss)
• [](##Baseline Uncertainty)
• [](##Al-28 activation spectrum)
• [](##Non-eq contribution)
• [](##nH peak)
• [](##Segment to Segment nH peak)
• [](##Wall thickness)
• [](##Z fiducial cut)
• [](##Energy Threshold)
• [](##Segment to Segment Energy Threshold)
• Energy Smearing

Background Normalization

The biggest variation from atmospheric pressure variation is 1%. If we conservatively estimate a 100% uncertaintiy on this estimate, there will be a 1% background norm uncertainty. Study by XIangpan shows that there is no variation in sensitivity when 10% is used.

Non-linearity

Cherenkov contribution

Energy Scale

Energy Resolution

Energy Loss

make generateLvsEELossCovMatrix
./generateLvsEELossCovMatrix test_6.root LvsEELossCovMatrix.root 0.008 1000

Background Scaling

Segment to Segment Volume

Segment to Segment efficiency

Segment to Segment energy Scale

Segment to Segment energy resolution

Segment to Segment energy loss

Baseline Uncertainty

Al-28 activation spectrum

Al - 27 in the core in the reaction, then will activated capturing neutron be converted to Al-28 then will produce beta decay (will produce antineutrino ) 2.86 MeV

Non-eq contribution

nH peak

neutron capture in hidrogen 2.22MeV gamma (big background)

Segment to Segment nH peak

Wall thickness

Z fiducial cut

Energy Threshold

Segment to Segment Energy Threshold

Energy Smearing