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Studies of Intrauclear Model Systematics for Transformations in - - PowerPoint PPT Presentation

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Studies of Intrauclear Model Systematics for Transformations in by Joshua L. Barrow, jbarrow@fnal.gov (jbarrow3@vols.utk.edu) For the DUNE Collaboration (Nucleon Decay and High-Energy Physics Working

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SLIDE 1

Studies of Intrauclear Model Systematics for 𝒐 → ഥ 𝒐 Transformations in 𝟐𝟗

𝟓𝟏𝑩𝒔

by Joshua L. Barrow, jbarrow@fnal.gov (jbarrow3@vols.utk.edu) For the DUNE Collaboration (Nucleon Decay and High-Energy Physics Working Group) The 2019 International Workshop on Baryon and Lepton Number Violation, Madrid, Spain Tuesday, October 22nd, 2019

This material is based upon JB’s work supported by the U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists, Office of Science Graduate Student Research (SCGSR)

  • program. The SCGSR program is administered by the Oak

Ridge Institute for Science and Education for the DOE under contract number DE‐SC0014664.

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SLIDE 2
  • Any matter-antimatter asymmetry created by

(𝐶 − 𝑀) conserving SM/BSM interactions is thought to be erased during the EW phase transition

  • Sphaleron “washes out” effectively all asymmetry (Dolgov,

1982, among others)

  • Some models DO violate 𝐶 − 𝑀
  • …or, Δ𝐶 = 2 processes, like neutron-antineutron (𝒐 → ഥ

𝒐)

  • scillations
  • These searches can probe BSM physics above LHC scales
  • A “post-sphaleron” baryogenesis (PSB) (Babu, Mohapatra

et al., 2006 and 2013)

  • (Non)Observation of the transformation would

be a spectacular discovery

  • Could explain the BAU, making leptogenesis “interesting…[but]

irrelevant”—Mohapatra

  • …or rule out “compelling” PSB entirely—Nelson

Motivations for Experimental Detection of 𝒐 → ഥ 𝒐 Transformations

October 22nd, 2019 2019 International Workshop on Baryon and Lepton Number Violation 2

DUNE (SK Bkgd) ESS (0 Bkgd) DUNE (0 Bkgd)

Super-Kamiokande 𝟑𝟓:𝟐𝟑%

𝝊𝑵 = 𝑺 ⋅ 𝝊𝒐→ഥ

𝒐 𝟑

𝑺𝐁𝐬~𝟔. 𝟕 × 𝟐𝟏𝟑𝟑𝒕−𝟐 ± 𝟐𝟔% See arXiv:1906.02833

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SLIDE 3
  • Any matter-antimatter asymmetry created by

(𝐶 − 𝑀) conserving SM/BSM interactions is thought to be erased during the EW phase transition

  • Sphaleron “washes out” effectively all asymmetry (Dolgov,

1982, among others)

  • Some models DO violate 𝐶 − 𝑀
  • …or, Δ𝐶 = 2 processes, like neutron-antineutron (𝒐 → ഥ

𝒐)

  • scillations
  • These searches can probe BSM physics above LHC scales
  • A “post-sphaleron” baryogenesis (PSB) (Babu, Mohapatra

et al., 2006 and 2013)

  • (Non)Observation of the transformation would

be a spectacular discovery

  • Could explain the BAU, making leptogenesis “interesting…[but]

irrelevant”—Mohapatra

  • …or rule out “compelling” PSB entirely—Nelson

Motivations for Experimental Detection of 𝒐 → ഥ 𝒐 Transformations

October 22nd, 2019 2019 International Workshop on Baryon and Lepton Number Violation 2

DUNE (SK Bkgd) ESS (0 Bkgd) DUNE (0 Bkgd)

Super-Kamiokande 𝟑𝟓:𝟐𝟑%

𝝊𝑵 = 𝑺 ⋅ 𝝊𝒐→ഥ

𝒐 𝟑

𝑺𝐁𝐬~𝟔. 𝟕 × 𝟐𝟏𝟑𝟑𝒕−𝟐 ± 𝟐𝟔% See arXiv:1906.02833

DUNE (TDR Analysis)

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SLIDE 4

The Need to Understand 𝒐 → ഥ 𝒐 Modeling Systematics Beyond 𝑺

…in the context of automated reconstruction and analysis techniques (CNNs, BDTs)

October 22nd, 2019 2019 International Workshop on Baryon and Lepton Number Violation 3

  • How do we understand the usefulness and stability of prospective, Monte Carlo-

derived limits?

– When we simulate events, how stable are signal efficiencies? – When we simulate backgrounds, how stable are rejection rates? – In some respect, these questions go beyond simple statistics…

  • Do our final state signal and/or background topologies change depending on the

underlying nuclear and intranuclear cascade models?

– In GENIEv3.0.6, there are three main nuclear models currently available:

1. Bodek-Ritchie (relativistic) nonlocal Fermi gas 2. Local (nonrelativistic) Fermi Gas 3. Effective Spectral Function (nonlocal)

– There are two main intranuclear cascades currently available:

1. hA2018 (single effective interaction) 2. hN2018 (full intranuclear cascade model)

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SLIDE 5

GENIEv3.0.6 hA/hN2018 and Local Fermi Gas GENIEv3.0.6 hA/hN2018 and Bodek-Ritchie

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Initial States (Single Nucleon Momentum)

October 22nd, 2019 2019 International Workshop on Baryon and Lepton Number Violation 4

GENIE truth-level—no DUNE reconstruction yet

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SLIDE 6

GENIEv3.0.6 hA/hN2018 and Local Fermi Gas GENIEv3.0.6 hA/hN2018 and Bodek-Ritchie

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Initial States (Momentum vs. Radius)

…internal correlations or no?

October 22nd, 2019 2019 International Workshop on Baryon and Lepton Number Violation 5

GENIE truth-level—no DUNE reconstruction yet

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SLIDE 7

GENIEv3.0.6 hA/hN2018 and Local Fermi Gas GENIEv3.0.6 hA/hN2018 and Bodek-Ritchie

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Initial States (Mesonic Parameter Space)

October 22nd, 2019 2019 International Workshop on Baryon and Lepton Number Violation 6

GENIE truth-level—no DUNE reconstruction yet

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SLIDE 8

GENIEv3.0.6 hN2018 and Local Fermi Gas GENIEv3.0.6 hN2018 and Bodek-Ritchie

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Final States (Pionic parameter space only)

October 22nd, 2019 2019 International Workshop on Baryon and Lepton Number Violation 7

GENIE truth-level—no DUNE reconstruction yet

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SLIDE 9

GENIEv3.0.6 hN2018 and Local Fermi Gas GENIEv3.0.6 hN2018 and Bodek-Ritchie

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Final States (Pionic parameter space only)

October 22nd, 2019 2019 International Workshop on Baryon and Lepton Number Violation 7

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SLIDE 10

GENIEv3.0.6 hN2018 and Local Fermi Gas GENIEv3.0.6 hN2018 and Bodek-Ritchie

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Final States (Pionic parameter space only)

October 22nd, 2019 2019 International Workshop on Baryon and Lepton Number Violation 7

The intranuclear cascade kills most

  • f the original

shape of the parameter space

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SLIDE 11

GENIEv3.0.6 hN2018 and Local Fermi Gas GENIEv3.0.6 hN2018 and Bodek-Ritchie

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Final States (Pionic parameter space only)

Approximate atmospheric 𝝃 parameter space is

  • verlayed

October 22nd, 2019 2019 International Workshop on Baryon and Lepton Number Violation 7

The intranuclear cascade kills most

  • f the original

shape of the parameter space

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SLIDE 12

GENIEv3.0.6 hN2018 and Local Fermi Gas GENIEv3.0.6 hN2018 and Bodek-Ritchie

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Final States (Pionic parameter space only)

Approximate atmospheric 𝝃 parameter space is

  • verlayed

Will greater localization matter? Effects on FS topologies?

October 22nd, 2019 2019 International Workshop on Baryon and Lepton Number Violation 7

The intranuclear cascade kills most

  • f the original

shape of the parameter space

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SLIDE 13
  • Six independent model configurations (tunes) for ത

𝑜Ar are complete

– hN2018, hA2018 ⨂ Bodek − Ritchie, Local Fermi Gas, Eff. Spectral Function

  • 𝑜 → ത

𝑜 event productions and truth-level validation of all models is complete

– Importation into DUNE’s LArSoft detector reconstruction chain is nearly complete – E. S. Golubeva’s 𝑜 → ത 𝑜 MCs will be imported into LArSoft reconstruction chain in coming weeks

  • Three flavor, fully oscillated atmospheric 𝜉ℓAr background sample productions are complete

– Completed with FNAL/Northwestern colleagues, detector reconstruction chain nearly complete – Using Honda fluxes, again running over identical model configurations

  • Will then compare all 100,000/100,000 signal/background event samples pairwise

– Columbia University-developed CNN automated analysis framework ready to go

  • Will possibly run jointly with a BDT

– This will give 6-8 independent signal efficiencies/background rates, and so 6-8 𝝊𝒐→ഥ

𝒐 values

  • The spread of these values will hint at the signal/background (in)variance due to microscopic dependencies in nuclear

modeling—if stable, not to worry!

  • Will complete technical note and DUNE official publication in coming months
  • A similar program will follow for 𝑞 → 𝐿𝜉 in DUNE (event production also complete)

Assessing Simulation Systematics—Nearing Completion

October 22nd, 2019 2019 International Workshop on Baryon and Lepton Number Violation 8

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SLIDE 14

Questions? Comments? Thank-you for your attention!

Please come see my poster! There will be far more to discuss!

This material is based upon JB’s work supported by the U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists, Office of Science Graduate Student Research (SCGSR)

  • program. The SCGSR program is administered by the Oak

Ridge Institute for Science and Education for the DOE under contract number DE‐SC0014664.