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DUNE experiment physicsSeb Jonesfor the DUNE collaborationDepartment of Physics & AstronomyUniversity College LondonJuly 30, 2020ICHEP 2020July 30, 20201 21
OverviewDUNE overviewDeep Underground Neutrino ExperimentBroad-band neutrino beam sent from Fermilab to SanfordUnderground Research Facility (baseline of 1300 km)Multi-component near detector (including a liquid argon component)Liquid argon far detector with eventual 68 kt mass (4 17 ktmodules)ICHEP 2020July 30, 20202 21
OverviewFar detector (FD)Far detector is located1500 m underground atSURFConsists of 4 modules, eachwith a total (fiducial) massof 17 kt (10 kt)The first of these moduleswill use single-phasetechnologyThe collaboration isdeveloping single-phase anddual-phase options for theother modulesICHEP 2020July 30, 20203 21
Overviewν/ν̄ beamν̄ modeν modeBeam of mainly νµ (when running in neutrino enhanced mode) ormainly ν̄µ (when running in antineutrino enhanced mode)Measured in multi-component near detectorICHEP 2020July 30, 20204 21
OverviewNear detector (ND)Neutrino beam measured in multi-component near detector 574 mfrom targetConsists of both a liquid and gaseous argon component and a beammonitorAllows characterisation of beam as well as constraining cross-sectionuncertaintiesSee P. Dunne’s talk “Status of the DUNE near detector ” for furtherdetailsICHEP 2020July 30, 20205 21
OverviewDUNE physics programLong baseline ν/ν̄ oscillation physicsMeasurement of δCP and potential CP violation by neutrinosNeutrino mass hierarchy determination, m2Measurements of θ23 and θ13Supernova neutrino burstsC. Cuesta’s talk: “Core-Collapse Supernova Burst Neutrinos inDUNE ”A. J. Roeth’s talk: “Supernova Neutrino Pointing with DUNE ”BSM processes (see D. Kim’s talk: “BSM Physics Prospects atDUNE ”)Nucleon decay (see C. Alt’s talk: “Nucleon decay search at DUNE ”)n n̄ oscillation (see Y.-J. Jwa’s talk: “Neutron-antineutronoscillation search with DUNE ”)Non-standard interactionsSterile neutrino searchesICHEP 2020July 30, 20206 21
Long baseline sensitivitiesLong baseline sensitivitesDUNE νµ Disappearancesin2θ23 0.580700 m232 2.451 10-3 eV23.5 years (staged)Signal νµ CCνµ CCNC(νe νe) CC(ντ ντ) CC600500ν̄ modeEvents per 0.25 GeVEvents per 0.25 GeVν mode800350DUNE νµ Disappearancesin2θ23 0.580300 m232 2.451 10-3 eV23.5 years (staged)Signal νµ CCνµ CCNC(νe νe) CC(ντ ντ) CC2502004001503001002005010012DUNE νe AppearanceNormal Orderingsin22θ13 0.088sin2θ23 0.5803.5 years (staged)Signal (νe νe) CCBeam (νe νe) CCNC(νµ νµ ) CC(ντ ντ) CC16014012010080δCP -π/2δCP 0δCP π/26012345678Reconstructed Energy (GeV)DUNE νe AppearanceNormal Orderingsin22θ13 0.088sin2θ23 0.5803.5 years (staged)Signal (νe νe) CCBeam (νe νe) CCNC(νµ νµ ) CC(ντ ντ) CC70605040δCP -π/2δCP 0δCP π/2302040102000345678Reconstructed Energy (GeV)Events per 0.25 GeVEvents per 0.25 GeV012345678Reconstructed Energy (GeV)012Far detector samplesuse full simulation andreconstruction includingConvolutional NeuralNetwork for identifyingneutrino flavourSee “Neutrinointeraction classificationwith a convolutionalneural network in theDUNE far detector” –arXiv:2006.15052345678Reconstructed Energy (GeV)ICHEP 2020July 30, 20207 21
Long baseline sensitivitiesLong baseline sensitivitesDUNE νµ Disappearancesin2θ23 0.5807002 m32 2.451 10-3 eV23.5 years (staged)Signal νµ CCνµ CCNC(νe νe) CC(ντ ντ) CC600500ν̄ modeEvents per 0.25 GeVEvents per 0.25 GeVν mode800350DUNE νµ Disappearancesin2θ23 0.5803002 m32 2.451 10-3 eV23.5 years (staged)Signal νµ CCνµ CCNC(νe νe) CC(ντ ντ) CC250200400Sensitivities determinedusing 4-component fitof FD data along with aconstraint from the ND1503005010012DUNE νe AppearanceNormal Orderingsin22θ13 0.088sin2θ23 0.5803.5 years (staged)Signal (νe νe) CCBeam (νe νe) CCNC(νµ νµ ) CC(ντ ντ) CC16014012010080δCP -π/2δCP 0δCP π/26012345678Reconstructed Energy (GeV)DUNE νe AppearanceNormal Orderingsin22θ13 0.088sin2θ23 0.5803.5 years (staged)Signal (νe νe) CCBeam (νe νe) CCNC(νµ νµ ) CC(ντ ντ) CC70605040δCP -π/2δCP 0δCP π/2302040102000345678Reconstructed Energy (GeV)Events per 0.25 GeVEvents per 0.25 GeV0Full suite of systematicsused10020012345678Reconstructed Energy (GeV)012345678Reconstructed Energy (GeV)ICHEP 2020Full results available in“Long-baseline neutrinooscillation physicspotential of the DUNEexperiment” –arXiv:2006.16043For Asimovs, NuFit 4.0best fit points usedJuly 30, 20208 21
Long baseline sensitivitiesTreatment of systematicsFlux: Vary hadron productionmodels and design parameters ofthe beamlineNeutrino interaction: Used bothreweighting parameters built intoneutrino interaction generator(GENIE) as well as customweightings developed for thisanalysisDetector: Uncertainties ondetector response for variousparticle typesRight: constraint on systematicswith and without ND constraintICHEP 2020July 30, 20209 21
Long baseline sensitivitiesCPV sensitivityAfter 10 years (staged), there is significant CP violation(δCP 6 0, π) discovery potential across true values of δCP and forboth hierarchiesICHEP 2020July 30, 202010 21
Long baseline sensitivitiesCPV sensitivity over timeCP Violation Sensitivity1210DUNE Sensitivity (Staged)All SystematicsNormal Orderingsin22θ13 0.088 0.003sin2θ23 0.580 unconstrainedδCP -π/250% of δCP values75% of δCP valuesNominal Analysisθ13 unconstrainedAfter 10 years (staged) ofrunning, discovery potentialreached for 50% of true δCPσ χ286After 15 years (staged),evidence of CPV for 75% ofδCP values42002468101214YearsICHEP 2020July 30, 202011 21
Long baseline sensitivitiesδCP resolution45δCP Resolution (degrees)4035DUNE SensitivityAll SystematicsNormal Orderingsin22θ13 0.088 0.003sin2θ23 0.580 unconstrained7 years (staged)10 years (staged)15 years (staged)Nominal Analysisθ13 unconstrainedAfter 10 years (staged)running, δCP resolution is10 20 302520Moving to longer exposures,resolution drops to even lowerlevels151050 1 0.8 0.6 0.4 0.2 0 0.2 0.4 0.6 0.8δCP/π1ICHEP 2020July 30, 202012 21
Long baseline sensitivitiesMass ordering sensitivityObtain a definitive answer for the mass hierarchy within 7 years(staged), regardless of the values of the other oscillation parametersICHEP 2020July 30, 202013 21
Long baseline sensitivitiesMass ordering sensitivity over timeMass Ordering Sensitivity3530δCP -π/2100% of δCP valuesNominal Analysisθ13 unconstrainedDUNE Sensitivity (Staged)All SystematicsNormal Orderingsin22θ13 0.088 0.003sin2θ23 0.580 unconstrained χ225After 2 years, for all values ofδCP the mass ordering ismeasured to 5σ2015105001234567YearsICHEP 2020July 30, 202014 21
Long baseline sensitivitiesPrecision measurements of θ23 and θ130.750.70.65DUNE SensitivityNormal Orderingsin22θ13 0.088 0.00390% C.L. (2 d.o.f.)0.117 years (staged)10 years (staged)15 years (staged)NuFIT 4.0 90% C.L.0.105True Value0.1sin22θ13sin2θ230.6DUNE SensitivityAll SystematicsNormal Orderingsin2θ23 0.580 unconstrained90% C.L. (2 d.o.f.)7 years (staged)10 years (staged)15 years (staged)NuFIT 4.0 90% C.L.True Value0.0950.550.090.50.450.0850.40.080.35 1 0.8 0.6 0.4 0.2 0 0.2 0.4 0.6 0.8δCP/π1 1 0.8 0.6 0.4 0.2 0 0.2 0.4 0.6 0.8δCP/π1DUNE will allow a precision measurement of the value of θ23 whichwill exceed the current limitsAfter 15 years (staged) of running, DUNE’s θ13 measurement willbe comparable with reactor experimentsICHEP 2020July 30, 202015 21
Supernova neutrino burstsSupernova neutrino burstsEvents per bin40 kton argon, 10 kpc80InfallNeutronizationAccretion70CoolingNo oscillationsNormal ordering60Inverted ordering50403020100.050.10.150.20.25Time (seconds)DUNE will also be sensitive to neutrinos emitted by a galacticcore-collapse supernovaPrimarily through channel: νe 40 Ar e 40 K Not only will this provide information about the physics of supernovacore-collapse but it could also give some hints about the oscillationphysicsUpcoming paper: “Supernova Neutrino Burst Detection with theDeep Underground Neutrino Experiment”ICHEP 2020July 30, 202016 21
BSM physicsBeyond the standard model physicsNucleon decay 40Nucleon decay event: 50 60x (cm)Large far detector mass allowssearches for proton decayDUNE will be especially sensitive tothe decay channel p K ν̄ 70 80 90Non-standard interactionsTrue vertex 100Non-standard matter effects may bevisible in the DUNE far detector dueto the long baselineICHEP 202010101015102010251030z (cm)1035104010451050104010451050 215 220 225y (cm)Many other prospects detailed inupcoming paper: “Prospects forBeyond the Standard Model PhysicsSearches at the Deep UndergroundNeutrino Experiment”Reconstructed vertex1005 230 235 240 245 250100510101015102010251030z (cm)1035July 30, 202017 21
SummarySummaryDUNE will enable an exciting physics programMeasurement of possible CPV in lepton sectorMeasurement of neutrino mass hierarchyPrecision measurements of other oscillation parametersSupernova neutrino burst physicsMany BSM searchesDUNE FD Technical Design Report Volume II(arXiv:2002.03005) contains more details on physics possibilitiesSeries of publications either available or planned which are made upof parts of this volume of the TDR22 other DUNE talks at ICHEP this yearICHEP 2020July 30, 202018 21
BackupBackupICHEP 2020July 30, 202019 21
BackupAssumed staging planStart of beam run: two FD module volumes for total fiducial massof 20 kt, 1.2 MW beamAfter 1 year: add one FD module volume for total fiducial mass of30 ktAfter 3 years: add one FD module volume for total fiducial mass of40 ktAfter 6 years: upgrade to 2.4 MW beam50%/50% ratio of neutrino to antineutrino data assumedICHEP 2020July 30, 202020 21
BackupNuFit 4.0 ParametersNuFIT 4.0 (2018), www.nu-fit.org, JHEP 01 (2019) 106 –arXiv:1811.05487ICHEP 2020July 30, 202021 21
DUNE Sensitivity All Systematics Normal Ordering q 23 0.580 unconstrained sin2 90% C.L. (2 d.o.f.) 7 years (staged) 10 years (staged) 15 years (staged) NuFIT 4.0 90% C.L. True Value DUNE will allow a precision measurement of the value of 23 which will exceed the current limits After 15 years (staged) of running, DUNE's 13 measurement will
