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

𝟓𝟏 𝑩𝒔 Studies of Intrauclear Model Systematics for 𝒐 → ഥ 𝒐 Transformations in 𝟐𝟗 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 22 nd , 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.

Motivations for Experimental Detection of 𝒐 → ഥ 𝒐 Transformations 𝟑 • Any matter-antimatter asymmetry created by 𝝊 𝑵 = 𝑺 ⋅ 𝝊 𝒐→ഥ 𝒐 (𝐶 − 𝑀) conserving SM/BSM interactions is 𝑺 𝐁𝐬 ~𝟔. 𝟕 × 𝟐𝟏 𝟑𝟑 𝒕 −𝟐 ± 𝟐𝟔% thought to be erased during the EW phase See arXiv:1906.02833 transition • Sphaleron “washes out” effectively all asymmetry ( Dolgov, 1982 , among others) ESS ( 0 Bkgd ) DUNE ( 0 Bkgd ) • Some models DO violate 𝐶 − 𝑀 DUNE ( SK Bkgd ) • …or, Δ𝐶 = 2 processes, like neutron-antineutron ( 𝒐 → ഥ 𝒐 ) oscillations • 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 Super-Kamiokande 𝟑𝟓:𝟐𝟑% 2 October 2019 International Workshop on Baryon and Lepton Number Violation 22nd, 2019

Motivations for Experimental Detection of 𝒐 → ഥ 𝒐 Transformations 𝟑 • Any matter-antimatter asymmetry created by 𝝊 𝑵 = 𝑺 ⋅ 𝝊 𝒐→ഥ 𝒐 (𝐶 − 𝑀) conserving SM/BSM interactions is 𝑺 𝐁𝐬 ~𝟔. 𝟕 × 𝟐𝟏 𝟑𝟑 𝒕 −𝟐 ± 𝟐𝟔% thought to be erased during the EW phase See arXiv:1906.02833 transition • Sphaleron “washes out” effectively all asymmetry ( Dolgov, 1982 , among others) DUNE ( TDR Analysis ) ESS ( 0 Bkgd ) DUNE ( 0 Bkgd ) • Some models DO violate 𝐶 − 𝑀 DUNE ( SK Bkgd ) • …or, Δ𝐶 = 2 processes, like neutron-antineutron ( 𝒐 → ഥ 𝒐 ) oscillations • 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 Super-Kamiokande 𝟑𝟓:𝟐𝟑% 2 October 2019 International Workshop on Baryon and Lepton Number Violation 22nd, 2019

The Need to Understand 𝒐 → ഥ 𝒐 Modeling Systematics Beyond 𝑺 …in the context of automated reconstruction and analysis techniques (CNNs, BDTs) • 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) 3 October 2019 International Workshop on Baryon and Lepton Number Violation 22nd, 2019

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Initial States (Single Nucleon Momentum) GENIEv3.0.6 hA/hN2018 and Local Fermi Gas GENIEv3.0.6 hA/hN2018 and Bodek-Ritchie GENIE truth-level — no DUNE reconstruction yet 4 October 2019 International Workshop on Baryon and Lepton Number Violation 22nd, 2019

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Initial States (Momentum vs. Radius) …internal correlations or no? GENIEv3.0.6 hA/hN2018 and Local Fermi Gas GENIEv3.0.6 hA/hN2018 and Bodek-Ritchie GENIE truth-level — no DUNE reconstruction yet 5 October 2019 International Workshop on Baryon and Lepton Number Violation 22nd, 2019

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Initial States (Mesonic Parameter Space) GENIEv3.0.6 hA/hN2018 and Local Fermi Gas GENIEv3.0.6 hA/hN2018 and Bodek-Ritchie GENIE truth-level — no DUNE reconstruction yet 6 October 2019 International Workshop on Baryon and Lepton Number Violation 22nd, 2019

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Final States ( Pionic parameter space only ) GENIEv3.0.6 hN2018 and Local Fermi Gas GENIEv3.0.6 hN2018 and Bodek-Ritchie GENIE truth-level — no DUNE reconstruction yet 7 October 2019 International Workshop on Baryon and Lepton Number Violation 22nd, 2019

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Final States ( Pionic parameter space only ) GENIEv3.0.6 hN2018 and Local Fermi Gas GENIEv3.0.6 hN2018 and Bodek-Ritchie 7 October 2019 International Workshop on Baryon and Lepton Number Violation 22nd, 2019

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Final States ( Pionic parameter space only ) The intranuclear cascade kills most of the original shape of the parameter space GENIEv3.0.6 hN2018 and Local Fermi Gas GENIEv3.0.6 hN2018 and Bodek-Ritchie 7 October 2019 International Workshop on Baryon and Lepton Number Violation 22nd, 2019

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Final States ( Pionic parameter space only ) The intranuclear cascade kills most of the original shape of the parameter space Approximate atmospheric 𝝃 parameter space is overlayed GENIEv3.0.6 hN2018 and Local Fermi Gas GENIEv3.0.6 hN2018 and Bodek-Ritchie 7 October 2019 International Workshop on Baryon and Lepton Number Violation 22nd, 2019

Some GENIEv3.0.6 Intranuclear ഥ 𝒐𝑶 Final States ( Pionic parameter space only ) The intranuclear cascade kills most of the original shape of the parameter space Approximate atmospheric 𝝃 parameter space is overlayed Will greater localization matter? GENIEv3.0.6 hN2018 and Local Fermi Gas GENIEv3.0.6 hN2018 and Bodek-Ritchie Effects on FS topologies? 7 October 2019 International Workshop on Baryon and Lepton Number Violation 22nd, 2019

Assessing Simulation Systematics — Nearing Completion • 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 𝜉 ℓ Ar 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 𝝊 𝒐→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) 8 October 2019 International Workshop on Baryon and Lepton Number Violation 22nd, 2019

Please come see my poster! There will be far more to discuss! Questions? Comments? Thank-you for your attention! 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.