New ν +! ν +!+ ν +! ν +! ν +!Oscillation ν +! Results from NOvA Jeremy Wolcott (Tufts University) 52 nd Fermilab Users Meeting June 13, 2019
Neutrino ν +!oscillations Neutrino oscillations are a rich ν +!laboratory for understanding the implications ν +!of ν +!neutrino ν +!mass MINOS (... so the global program is healthy and diverse!) FNAL UM / June 13, 2019 J. Wolcott / Tufts University 2
Neutrino ν +!oscillations Neutrino oscillations are a rich ν +!laboratory for understanding the implications ν +!of ν +!neutrino ν +!mass MINOS NOvA ν +!is ν +!uniquely ν +!positioned to investigate several of the biggest ν +!remaining physics ν +!questions : FNAL UM / June 13, 2019 J. Wolcott / Tufts University 3
Neutrino ν +!oscillations Neutrino oscillations are a rich ν +!laboratory for understanding the implications ν +!of ν +!neutrino ν +!mass MINOS NOvA ν +!is ν +!uniquely ν +!positioned to investigate several of the biggest ν +!remaining physics ν +!questions : Is there a symmetry governing the ν μ / ν τ mixing into the mass states? (Is θ 23 /maximal” = 45º?*º?) ? ν 3 = ν e ν μ ν τ FNAL UM / June 13, 2019 J. Wolcott / Tufts University 4
Neutrino ν +!oscillations Neutrino oscillations are a rich ν +!laboratory for understanding the implications ν +!of ν +!neutrino ν +!mass MINOS NOvA ν +!is ν +!uniquely ν +!positioned to investigate several of the biggest ν +!remaining physics ν +!questions : Is there a symmetry between the ordering ν +!of ν +!the ν +!neutrino & Is there a symmetry governing the ν μ / ν τ charged lepton mass ν +!states ? mixing into the mass states? (Is the mass hierarchy (Is θ 23 /maximal” = 45º?*º?) /normal” or /inverted?”) ? ν 3 = vs ν e ν μ ν τ FNAL UM / June 13, 2019 J. Wolcott / Tufts University 5º?*
Neutrino ν +!oscillations Neutrino oscillations are a rich ν +!laboratory for understanding the implications ν +!of ν +!neutrino ν +!mass MINOS NOvA ν +!is ν +!uniquely ν +!positioned to investigate several of the biggest ν +!remaining physics ν +!questions : Is there a symmetry between the ordering ν +!of ν +!the ν +!neutrino & Is there a symmetry governing the ν μ / ν τ charged lepton mass ν +!states ? mixing into the mass states? (Is the mass hierarchy (Is θ 23 /maximal” = 45º?*º?) /normal” or /inverted?”) Is there ν +!'direct' ν +!violation ν +!of ? CP ν +!symmetry by leptons? ν 3 = vs (Is δ CP / non-integral?) ν e ν μ ν τ � FNAL UM / June 13, 2019 J. Wolcott / Tufts University 6
NOvA ● NOvA investigates with: – 700 kW NuMI beam – 810km baseline from FNAL to Ash River, MN – 300t Near and 14kt Far detectors 14mrad off axis K. ENGMAN/ SCIENCE 345, 6204 FNAL UM / June 13, 2019 J. Wolcott / Tufts University 7
NOvA ● NOvA investigates with: Thank ν +!you ν +!Fermilab!! – 700 ν +!kW ν +!NuMI ν +!beam 75º?*8 kW peak hourly avg: currently highest in the world – 810km baseline from (even higher beam power to be realized with higher power NuMI target, planned accelerator improvements) FNAL to Ash River, MN – 300t Near and 14kt Far detectors 14mrad off axis (See also New Perspectives talk from Y. Yu) FNAL UM / June 13, 2019 J. Wolcott / Tufts University 8
NOvA Combined with 99.23% detector uptime, ν +! ● NOvA investigates with: 78% ν +!increase ν +!in ν +! ν +! ν +!exposure (6.91×10 20 → 12.33×10 20 POT) – 700 ν +!kW ν +!NuMI ν +!beam since ν +!last ν +!year's ν +!Users ν +!Meeting – 810km baseline from New ν +!results ν +!unveiled ν +!today! FNAL to Ash River, MN – 300t Near and 14kt Far detectors 14mrad off axis (See also New Perspectives talk from Y. Yu) FNAL UM / June 13, 2019 J. Wolcott / Tufts University 9
NOvA ● NOvA investigates with: – 700 ν +!kW ν +!NuMI ν +!beam – 810km baseline from FNAL to Ash River, MN – 300t ν +!Near and 14kt Far ● Neutrino ν +!scattering ν +!/cross ν +!sections detector s 14mrad off axis ( new : arXiv:1902.005º?*5º?*8) ● Short-baseline sterile searches ν Capable ν +!all-purpose ν +!detectors also ν +!conducting ν +!many ν +!other ν +!measurements! (Posters from S. ν +!Lin, ν +!S. ν +!Calvez, ν +!M. ν +!Judah ) FNAL UM / June 13, 2019 J. Wolcott / Tufts University 10
NOvA ● NOvA investigates with: ● Long-baseline ν +! sterile8 ν +!searches ν +! – 700 ν +!kW ν +!NuMI ν +!beam ● Seasonal cosmic ray studies ( new: ν +! arXiv:1904.12975º?*) – 810km baseline from ● Supernova s ν ● Exotic searches: FNAL to Ash River, MN ● Magnetic monopoles ● N-N oscillations – 300t Near and 14kt ν +!Far ν +! ● Gravitational wave coincidence detector s 14mrad off axis ... Capable ν +!all-purpose ν +!detectors also ν +!conducting ν +!many ν +!other ν +!measurements! (Poster from A. ν +!Norrick ) FNAL UM / June 13, 2019 J. Wolcott / Tufts University 11
3-fmavor ν +!neutrino ν +!oscillations * ( ) ( ) 2 L | Δ m 4 E | = π 2 Arbitrary units 2 2 θ 23 sin * In fjts to data the full three-fmavor probability is used with no approximations FNAL UM / June 13, 2019 J. Wolcott / Tufts University 12
3-fmavor ν +!neutrino ν +!oscillations ( ) ( ) (Is θ 23 /maximal” = 45º?*º?) ? ν 3 = ν e ν μ ν τ Muon ν +!neutrino ν +!disappearance ν +! ν +! →! θ 23 FNAL UM / June 13, 2019 J. Wolcott / Tufts University 13
3-fmavor ν +!neutrino ν +!oscillations ( ) ( ) Muon ν +!neutrinos in both (functionally identical) detectors: FNAL UM / June 13, 2019 J. Wolcott / Tufts University 14
3-fmavor ν +!neutrino ν +!oscillations [Nunokawa, Parke, Valle, Prog. Part. Nucl. Phys. 60, 338] ( ) ( ) * with (in vacuum ) * In fjts to data the full three-fmavor probability is used with no approximations FNAL UM / June 13, 2019 J. Wolcott / Tufts University 15º?*
3-fmavor ν +!neutrino ν +!oscillations [Nunokawa, Parke, Valle, Prog. Part. Nucl. Phys. 60, 338] vs ν ν ( ( ) ) ( ( ) ) with Is δ CP / non-integral? (Is θ 23 <, >, = 45º?*º?) � ? ν 3 = ν e ν μ ν τ (in vacuum ) FNAL UM / June 13, 2019 J. Wolcott / Tufts University 16
3-fmavor ν +!neutrino ν +!oscillations δ C P Is δ CP / non-integral? � FNAL UM / June 13, 2019 J. Wolcott / Tufts University 17
3-fmavor ν +!neutrino ν +!oscillations (Is θ 23 <, >, = 45º?*º?) ? increasing ν +! θ 23 ν 3 = (/octant”) ν e ν μ ν τ δ C P Is δ CP / non-integral? � FNAL UM / June 13, 2019 J. Wolcott / Tufts University 18
3-fmavor ν +!neutrino ν +!oscillations [Nunokawa, Parke, Valle, Prog. Part. Nucl. Phys. 60, 338] vs ν ν ( ) ( ) with Is δ CP / non-integral? � vs (Is θ 23 <, >, = 45º?*º?) ? ν 3 = ν e ν μ ν τ Is the mass hierarchy /normal” or /inverted?” (in matter ) FNAL UM / June 13, 2019 J. Wolcott / Tufts University 19
3-fmavor ν +!neutrino ν +!oscillations increasing ν +! θ 23 (Is θ 23 <, >, = 45º?*º?) (/octant”) ? ν 3 = I H ν e ν μ ν τ vs N H Is the mass hierarchy /normal” or /inverted?” δ C P Is δ CP / non-integral? � Electron ν +!neutrino ν +!appearance ν +! →! θ 23 , ν +!MH, ν +! δ ν +! FNAL UM / June 13, 2019 J. Wolcott / Tufts University 20
3-fmavor ν +!neutrino ν +!oscillations [Nunokawa, Parke, Valle, Prog. Part. Nucl. Phys. 60, 338] vs ν ν ( ) ( ) with Electron ν +!neutrinos in both (functionally identical) detectors: FNAL UM / June 13, 2019 J. Wolcott / Tufts University 21
Identifying ν +!neutrino ν +!interactions Learned variatjons on the Input Image original image ν e ν μ bknds • Use convolutional neural network (CNN) called CVN – Technique borrowed from computer vision community – Learns topological /features”, eventually mapped onto desired output categories • NOvA ν +!pioneered ν +!this ν +!use in particle physics (JINST 11, P09001) effective exposure increase of 30% for ν e selection → • 3 ν +!theses, ν +!3 ν +!papers (and counting) from Deep Learning applications to NOvA (NP talk G. Nikseresht) FNAL UM / June 13, 2019 J. Wolcott / Tufts University 22
Identifying ν +!neutrino ν +!interactions [Data from beam commissioning] Thank ν +!you ν +! Fermilab ν +! Further PID & energy scale validation coming soon using for ν +! NOvA ν +!Test ν +!Beam support! Efforts from 7 ν +!postdocs, ν +!11 ν +!grad ν +!students, ν +!11 ν +!undergrads Taking cosmic ν +!& ν +!beam ν +!commissioning ν +!data ν +! now – beam run in fall 2019 (Poster from D. Phan; NP talk T. Lackey) FNAL UM / June 13, 2019 J. Wolcott / Tufts University 23
Predictions Converting ν +!an ν +!oscillation ν +!probability to ν +!a ν +!prediction (event count) we can use to extract parameters from data ν +!is ν +!a ν +!deceptively ν +!complex ν +!process... FNAL UM / June 13, 2019 J. Wolcott / Tufts University 24
Predictions Neutrino Detector reactions Neutrino response on detector materials flux ν l l - to charged particles and light W propagation p , π ± , … N Oscillations FNAL UM / June 13, 2019 J. Wolcott / Tufts University 25º?*
Predictions Neutrino Detector reactions Neutrino response on detector materials flux ν l l - to charged particles and light W propagation p , π ± , … N GENIE 2.12.2 Oscillations FNAL UM / June 13, 2019 J. Wolcott / Tufts University 26
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