0 PLANS FOR 2020 0 PLANS FOR 2020 19-12-2019 0 S IN 2019 Truth - - PowerPoint PPT Presentation

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Jan 22, 2023 485 likes •594 views

MILO VERMEULEN 19-12-2019 0 PLANS FOR 2020 0 PLANS FOR 2020 19-12-2019 0 S IN 2019 Truth utilities linking MC to reco and vice versa General purpose 0 information extraction module

SLIDE 1

Π0 PLANS FOR 2020

MILO VERMEULEN — 19-12-2019

SLIDE 2

Π0 PLANS FOR 2020 — 19-12-2019

Π0S IN 2019

▸ Truth utilities linking MC to reco and vice versa ▸ General purpose π0 information extraction module ▸ protoduneana/protoduneana/singlephase/

EMTaskForce/ProtoDUNEPizeroAnaTree_module.cc

▸ Single / double shower reconstruction efficiency ▸ Track contamination of showers ▸ Catching shower hits in 3D cones

SLIDE 3

Π0 PLANS FOR 2020 — 19-12-2019

Π0S IN 2020

▸ PhD deadline 1-9-2020 ▸ End goal: π0 invariant mass peak in ProtoDUNE data ▸ Handles: ▸ Shower pair topology ▸ Shower dE/dx?

SLIDE 4

Π0 PLANS FOR 2020 — 19-12-2019

Π0S IN 2020 — DE/DX

▸ Distinguish between e+/- and γ shower ▸ Photon shower: effectively two overlapping e+/- showers

e+/- e+e- γ shower shower

SLIDE 5

Π0 PLANS FOR 2020 — 19-12-2019

Π0S IN 2020 — DE/DX

▸ MIP ~ 2.12 MeV/cm (https://lar.bnl.gov/properties/) ▸ Photon should have dE/dx ~ 4.24 MeV/cm ▸ Not what we see so far

1 2 3 4 5 6 7 8 9 10 Shower dE/dx [MeV/cm] 100 200 300 400 500 600 700 All dE/dx Most energetic shower dE/dx Least energetic shower dE/dx Old plot just for illustrative purposes

SLIDE 6

Π0 PLANS FOR 2020 — 19-12-2019

Π0S IN 2020 — DE/DX

▸ Single MIP photon showers could be due to asymmetric

e+e- production

▸ Shower MC information discarded by default ▸ Could look into extra charge deposition at very start of

shower by least energetic electron/positron (~2cm)

e+e- γ shower

SLIDE 7

Π0 PLANS FOR 2020 — 19-12-2019

Π0S IN 2020 — SHOWER PAIR TOPOLOGY

▸ π0 shower pair must ideally ▸ consist of two photon showers (decided via dE/dx?) ▸ point toward a common vertex (with a certain error) ▸ both start close to this vertex (γ mean free path ~ 18 cm) ▸ produce an invariant mass close to that of π0

SLIDE 8

Π0 PLANS FOR 2020 — 19-12-2019

Π0S IN 2020 — SHOWER PAIR TOPOLOGY

▸ MC studies must produce distributions for these variables ▸ Using true π0 occurrences ▸ Apply multivariate analysis on ProtoDUNE data

SLIDE 9

Π0 PLANS FOR 2020 — 19-12-2019

CONCLUSION

▸ Change in strategy: ▸ Gain initial result through multivariate analysis ▸ Refine through optimisations (catching hits in cones,

better dE/dx shower selection, etc.)

▸ Time is pressing!