TAUP 2019 | 09.09.2019 Recent cross-section results from MicroBooNE Supraja Balasubramanian , on behalf of the MicroBooNE collaboration Yale University 1
Short Baseline Neutrinos @ FNAL 3 liquid argon TPCs Study π πΌ - π e oscillations On the Booster Neutrino Beam NuMI SBND 110m MicroBooNE 470m I C A R U S 600m Booster Neutrino Beam 2 2 Supraja Balasubramanian | TAUP 2019
Short Baseline Neutrinos @ FNAL 3 liquid argon TPCs Study π πΌ - π e oscillations On the Booster Neutrino Beam NuMI SBND 110m MicroBooNE 470m I C A R U S 600m Booster Neutrino Beam STATUS: STATUS: Under Transported from construction CERN DATA-TAKING: DATA-TAKING: 2020 late 2019 3 3 Supraja Balasubramanian | TAUP 2019
Short Baseline Neutrinos @ FNAL 3 liquid argon TPCs Study π πΌ - π e oscillations On the Booster Neutrino Beam NuMI SBND 110m MicroBooNE 470m I C A R U S 600m Booster Neutrino Beam GOALS: Investigate the MiniBooNE β βlow-energy excessβ Conduct LArTPC r&d for future β large-scale detectors [DUNE]. Study π -Argon interactions β 4 Supraja Balasubramanian | TAUP 2019
Short Baseline Neutrinos @ FNAL 3 liquid argon TPCs Study π πΌ - π e oscillations On the Booster Neutrino Beam NuMI SBND 110m MicroBooNE 470m I C A R U S 600m Booster Neutrino Beam GOALS: Investigate the MiniBooNE β βlow-energy excessβ Conduct LArTPC r&d for future β large-scale detectors [DUNE]. Study π -Argon interactions β 5 Supraja Balasubramanian | TAUP 2019
The MiniBooNE LEE The MiniBooNE Low Energy Excess 1 [ oscillation signal electron-like from additional or sterile neutrino ] photon-like? [ unknown photon background] 1. FERMILAB-PUB-18-219, LA-UR-18-24586 6 Supraja Balasubramanian | TAUP 2019
...enter MicroBooNE same neutrino beam + similar baseline + MicroBooNEβs LArTPC technology can can distinguish between electrons & photons distinguish between electrons & photons. e - shower π³ shower e - β βGapβ : π³ showers have it & e - showers donβt. π³ β dE/dx: π³ pair-produces to make a shower => electron twice the dE/dx of the e - shower photon 7 Supraja Balasubramanian | TAUP 2019
Short Baseline Neutrinos @ FNAL 3 liquid argon TPCs Study π πΌ - π e oscillations On the Booster Neutrino Beam NuMI SBND 110m MicroBooNE 470m I C A R U S 600m Booster Neutrino Beam GOALS: Investigate the MiniBooNE β βlow-energy excessβ Conduct LArTPC r&d for future β large-scale detectors [DUNE]. Study π -Argon interactions β 8 Supraja Balasubramanian | TAUP 2019
LArTPC technology: light & charge β Prompt scintillation light: 85 tons active mass of LAr captured by 32 PMTs + acts as Cryostat temperature @ 77K trigger Nominal E field 273 V/cm β Ionization charge: drifted in electric field + collected by 3 anode wire planes. 9 Supraja Balasubramanian | TAUP 2019
MicroBooNEβs LArTPC: advantages High precision: millimeter-scale resolution β High statistics: Booster Neutrino Beam β Fully automated 3D reconstruction of π interaction β Excellent particle ID: topology & calorimetry β Argon: relevant to SBND, ICARUS, DUNE β 10 Supraja Balasubramanian | TAUP 2019
Short Baseline Neutrinos @ FNAL 3 liquid argon TPCs Study π πΌ - π e oscillations On the Booster Neutrino Beam NuMI SBND 110m MicroBooNE 470m I C A R U S 600m Booster Neutrino Beam GOALS: Investigate the MiniBooNE β βlow-energy excessβ Conduct LArTPC r&d for future β large-scale detectors [DUNE]. Study π -Argon interactions β 11 Supraja Balasubramanian | TAUP 2019
π -Argon interactions in MicroBooNE 12 12
π βs @ MicroBooNE: Booster Neutrino Beam approved to take 13.2e20 POT MicroBooNE MicroBooNE Booster Neutrino Beam 13 Supraja Balasubramanian | TAUP 2019 13
Cross sections in MicroBooNE 14 Supraja Balasubramanian | TAUP 2019
Cross sections in MicroBooNE Development of π interaction generators: β Very little data on Argon nucleus => MicroBooNEβs data is crucial. 15 Supraja Balasubramanian | TAUP 2019
Cross sections in MicroBooNE Development of π interaction generators: β Very little data on Argon nucleus => MicroBooNEβs data is crucial. π energy & flux calculation: β Understanding π -Ar interactions necessary for future LArTPC oscillation studies. 16 Supraja Balasubramanian | TAUP 2019
Cross sections in MicroBooNE Development of π interaction generators: β Very little data on Argon nucleus => MicroBooNEβs data is crucial. π energy & flux calculation: β Understanding π -Ar interactions necessary for future LArTPC oscillation studies. Constraining model β systematics: Important for oscillation studies. 17 Supraja Balasubramanian | TAUP 2019
Cross sections in MicroBooNE Development of π interaction generators: β Very little data on Argon nucleus => MicroBooNEβs data is crucial. π energy & flux calculation: β Understanding π -Ar interactions necessary for future LArTPC oscillation studies. Constraining model β systematics: Important for oscillation studies. Probe for nuclear effects: β Argon is a big nucleus; π -Ar cross sections are sensitive to final state interactions. 18 Supraja Balasubramanian | TAUP 2019
Cross sections in MicroBooNE Development of π interaction generators: β Very little data on Argon nucleus => MicroBooNEβs data is crucial. π energy & flux calculation: β Understanding π -Ar interactions necessary MicroBooNE provides for future LArTPC oscillation studies. high-precision event reconstruction & high-statistics π -Argon data Constraining model β systematics: required to perform Important for oscillation π cross-section measurements. studies. Probe for nuclear effects: β Argon is a big nucleus; π -Ar cross sections are sensitive to final state interactions. 19 Supraja Balasubramanian | TAUP 2019
Selected recent MicroBooNE cross-section publications π πΌ CC inclusive: First Measurement of Inclusive Muon Neutrino Charged Current Differential Cross Sections on Argon at EΞ½ βΌ 0.8 GeV with the MicroBooNE Detector [Accepted to PRL, arXiv:1905.09694] π πΌ CC pi0: First Measurement of Ξ½ΞΌ Charged-Current Ο0 Production on Argon with a LArTPC [Phys.Rev. D99 (2019) no.9, 091102, arXiv:1811.02700] CC N protons: Selection of Ξ½ΞΌ chargedβcurrent induced interactions with N>0 protons and performance of events with N=2 protons in the final state in the MicroBooNE detector from the BNB. [MICROBOONE-NOTE-1056-PUB] Others: Charged particle multiplicity: Eur. Phys. J. C (2019) 79: 248, arXiv:1805.06887 NC elastic: MICROBOONE-NOTE-1053-PUB π e CC with the NuMI beam: MICROBOONE-NOTE-1054-PUB ... 20 Supraja Balasubramanian | TAUP 2019
π πΌ CC inclusive channel 21 21
π πΌ CC Signal: interactions with a neutrino-induced muon. inclusive β High-statistics inclusive selection. Includes different interaction modes. β β Test neutrino interaction models. β Selection for other exclusive channels. arXiv:1905.09694 22 Supraja Balasubramanian | TAUP 2019
π πΌ CC EVENT SELECTION: COSMIC REJECTION inclusive Signal: interactions with a neutrino-induced muon. TPC-PMT matching to detect scintillation light β from π interaction in beam-spill window Avoid through-going tracks, stopping muons β 1 beam spill 1.6 πΌ s 1 π interaction 600 beamspills 25 cosmic rays 1 event 1 π interaction 15,000 cosmic rays this selection achieves 99.9% cosmic rejection 23 Supraja Balasubramanian | TAUP 2019
π πΌ CC EVENT SELECTION: NEUTRINO ID inclusive Signal: interactions with a neutrino-induced muon. Vertex & track reconstruction using Pandora β pattern recognition [ Eur. Phys. J. C78, 1, 82 (2018) ] Require vertex-track association + fiducial volume, β topological & calorimetric selection Muon momentum measured using multiple β coulomb scattering arXiv:1905.09694 24 24 Supraja Balasubramanian | TAUP 2019
First total, single & double π πΌ CC inclusive differential cross-section measurement on Argon at low results energy [paper on arXiv, accepted by PRL] arXiv:1905.09694 Compared to various π -nucleus β interaction generators: GENIE v2 &v3, GiBUU, NuWRO β Favors GENIE v3 , i.e. new improvements to GENIE model (local Fermi gas, RPA). β Full angular & momentum coverage 25 Supraja Balasubramanian | TAUP 2019
First total, single & double π πΌ CC inclusive differential cross-section measurement on Argon at low results energy [paper on arXiv, accepted by PRL] This result is a systematic test of the brand-new GENIE v3. arXiv:1905.09694 26 Supraja Balasubramanian | TAUP 2019
π πΌ CC π 0 channel 27 27
π πΌ CC π 0 Signal: interactions with a π πΌ -induced muon that produce a single π 0 . π 0 βs decay into 2 π³ βs β => important background for the π e oscillation analysis. β resonant pion production => important to understand for DUNE. β involves FSI => probe to understand these. 28 Supraja Balasubramanian | TAUP 2019
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