Luke Pickering PRISM weekly The Aether 2019-01-10 L. Pickering 2 - - PowerPoint PPT Presentation

Luke Pickering PRISM weekly The Aether 2019-01-10

• L. Pickering 2

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• We have some off-axis events!

○ Initial diagnostics threw up a few unknowns. ■ Recorded POTs all wrong ■ Non-Ar components in geometry need to be fidcuialized, leads to regions with no recorded POT ○ Mostly understood now: ■ GENIE job seems to be failing, Guang investigating. ■ Some non-Ar features in Z, will include in FV, but less important for POT weighting Cathode Module wall/readout plane Fiducializing

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• Count FV POT exposure in

1cm slices:

○ Use to ‘reweight’ to a reference POT from any run-plan (or job failure…)

• Missing regions due to

module walls, might be best not to move detector in exact meter stops.

○ Non-Ar feature every ~0.5 m ○ Suggest 3.75 m stops.

• Exposure weighting seems

to work as expected!

Exposure weight

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• Have some events!

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• Resurrecting old analysis code

○ Getting there, still a number of steps to make. ■ Just true interactions in FV ■ No reco selection/efficiency correction yet. ○ Fit weight code mechanically working, seems to be some problems in the event rate prediction though. ○ Incorporating some flux and xsec variations possible if time allows once everything else works.

• Normalization doesn’t need special

treatment anymore!

Flux CAF Event file True numu CC & FV selection

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• Cheating efficiency as before.

○ Using 1.5 m vertex desert (0.5 for standard FV + 1 m) ○ Still see some structure on axis @ high energy.

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• Ported Dan’s

regularization optimizer to c++, and it ~seems to work.

Choose reg strength To maximise bias/width trade-off Off-axis weights, Confusingly x-axis is x-pos * 2

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• After numerous problems with the

beamsim, things seem to be working now.

• Thrown almost all of the variations that had

any effect in previous studies.

• Results look very similar to previous

studies, which is good, as not too much has changed:

○ Three horns, Lower power proton driver ○ One missing feature, still investigating.

• Hoping to present at BIWG before CM, but

Laura seems mostly happy with status.

docdb:1517 Far detector

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• Main obvious missing feature can be

seen in the WSB in both beam modes.

• I have run a few more tweaks (include

HC to - 1sigma) and will include these this afternoon.

• Hopefully that is the last piece and I

can test and send out these flux uncertainties in the next few work days.

○ Test in CAFAna and in linear combination fits. Far detector docdb:1517

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• Many more details here.
• Expecting plots like this to make it into

the TDR.

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• Final flux uncertainties:

○ Need to present to BIWG, hoping to do that early next week.

• Produce 6 fits for Fake Data study

○ (With, Without off-axis) x (CVN, Parametric, Parameteric + fake data) FD Recon ■ Me/Guang to make sure it all works ■ Callum will do final, ‘official’ fits ○ Used to inform ‘systematic’ to cover possible bias in dcp, should dramatically reduce sensitivity. Argue DUNE-PRISM leaves us less susceptible to such problems.

• Produce linear combination prediction from CAFs, with/without fake

data shifts.

○ Currently trying to get this done with standalone code ○ I don’t anticipate having time to work on full CAFAna disappearance analysis, Will Guang, or are we punting for now?

Thanks for listening

• L. Pickering