Recent Results from ArgoNeuT and Status of MicroBooNE
Andrzej Szelc (on behalf of the ArgoNeuT and MicroBooNE collaborations) Yale University
6/7/14 A. M. Szelc, Neutrino 2014, Boston 1 Why Liquid Argon?
proton
● Bubble chamber quality of data with added full Muon calorimetry. ν interaction
● Can produce physics results Charged π with a “table-top” size experiment: – Benchmark - “standard candle” results. proton – Physics enabled by LAr capabilities. ν interaction – Development towards future large detectors. Muon Charged π
6/7/14 A. M. Szelc, Neutrino 2014, Boston 2 US based LAr R&D program
This talk
6/7/14 A. M. Szelc, Neutrino 2014, Boston 3 Short Baseline program at FNAL 600m ICARUS
1km ArgoNeuT Exciting, precision 540m physics at short baselines MiniBooNE (for more see J. Spitz's talk in this session). 470m MicroBooNE Develop the technology by putting the detectors in neutrino beams.
NuMI
PMT
6/7/14 A. M. Szelc, Neutrino 2014, Boston 5 ArgoNeuT in the NuMI beam line
● First LArTPC in a low (1-10 GeV) energy neutrino beam.
● 20 ν Acquired 1.35 × 10 POT, mainly in µ mode.
● Designed as a test experiment.
● But obtaining physics results! ArgoNeuT tech-paper: JINST 7 (2012) P10019
6/7/14 A. M. Szelc, Neutrino 2014, Boston 6 ν µ Charged Current Inclusive
Neutrino mode: ν 2 weeks of data taking µ CC-inclusive ]
cross-section m c / e [
x d / Q d
dE/dx [MeV/cm] Charge recombination with stopping protons R. Acciarri et al. ,2013 JINST 8 P08005 arXiv:1306.1712 Calorimetry with through-going muons
C.Anderson et al., 2012 JINST 7 P10020; C. Anderson et al., PRL 108, 2012 arxiv.org:1205.6702 6/7/14 A. M. Szelc, Neutrino 2014, Boston 7 ν CC Inclusive in µ mode
The composition of the beam allows measuring both the ν ν µ and µ components. Charge from MINOS.
Anti Neutrino mode: 5 months of data taking
ArXiv:1404.4809 Accepted in PRD
6/7/14 A. M. Szelc, Neutrino 2014, Boston 8 ν CC Inclusive in µ mode
The compositionNew of the beam physicsallows measuringresult both the ν ν (standard µ and µ candle) components. Charge from MINOS.
First Anti Neutrino mode: Measurement ν 5 months of data taking for µ in argon! ArXiv:1404.4809 Accepted in PRD
6/7/14 A. M. Szelc, Neutrino 2014, Boston 9 Coherent Pion Production
New physics result!
Most pions are not contained so not possible to use Q2 or t as discrimination.
MC used to build a binned background and signal expectation for a BDT response (based on kinematic variables).
This is then fit to the data.
Also, recent results from Minerva and T2K. 6/7/14 A. M. Szelc, Neutrino 2014, Boston 10 Observing proton multiplicities
● The granularity of the LArTPC allows seeing actual final state New, topologies. LArTPC enabled, physics ● Measuring cross sections as a function of proton multiplicity. result!
�+ 2p
� interaction vertex
ry a in m li re P
6/7/14 A. M. Szelc, Neutrino 2014, Boston 11 Back-to-Back Protons 4 back-to-back 2-proton events observed in Lab frame.
p γ Cos( )< - 0.95 p Possible mechanism is n CC RES pionless reactions involving pre- existing SRC np pairs.
p
p 4 back-to-back protons in CM frame as well!
We can see New, LArTPC enabled, nuclear physics effects! result! ArXiv:1405.4261 Submitted to PRD 6/7/14 A. M. Szelc, Neutrino 2014, Boston 12 Electron/gamma separation
EM Showers ● An EM shower that starts after a gap from the vertex is always background (especially if you can see two of them). Single electron
● Even if the gap is very small all is not lost. - + – We can reconstruct the charge at the start e /e pair producing gamma of the shower - “dE/dx discrimination”.
e Reconstructed Single Shower MC
γ → e-+e+
Average dE/dx 6/7/14 A. M. Szelc, Neutrino 2014, Boston 13 Example events
ν e CC candidate event ] m c / V e M [
x 2 MIP d
Distance from start / E d 1 MIP Distance From Start [cm]
ΝC candidate event ] m c / V e M [
x d /
E 2 MIP d
Distance from start 1 MIP Distance From Start [cm] 6/7/14 A. M. Szelc, Neutrino 2014, Boston 14 Data-Based dE/dx plot New, – Gammas defined as EM LArTPC enabled, showers detached from visible physics Electron/single gamma separation analysis! vertex. – Electrons defined as EM showers with visible vertex activity and no gap. – Electron events require no Y AR track matched to MINOS muon. IN IM EL PR DATA RY (area NA MI normalized) LI RE DATA P Topology cut not folded in.
Topology cut only average dE/dx Landau-like distribution of electron event single hit charge depositions. Single Hit dE/dx [MeV/cm] 6/7/14 A. M. Szelc, Neutrino 2014, Boston 15 NC π0 Study New Physics Analysis! ArgoNeuT is too small to contain the majority of photon showers from π 0's.
An MC based set of energy corrections based on event topology is needed.
2 x γ Angle between photons
Work continuing to refine the energy corrections and analyze the full data set 6/7/14 A. M. Szelc, Neutrino 2014, Boston 16 MicroBooNE
6/7/14 A. M. Szelc, Neutrino 2014, Boston 17 MicroBooNE and the Short Baseline Anomalies
● MicroBooNE will topological cut not folded in determine the nature of the MiniBooNE low energy excess by running on the same beam.
● The granularity and dE/dx separation will allow differentiating between photons and electrons.
NC π0 background!
Phys. Rev. Lett. 110, 161801 (2013)
6/7/14 A. M. Szelc, Neutrino 2014, Boston 18 Cross – section and physics R&D
BNB ● (~1GeV) Energy range very interesting in terms of cross- sections.
Cross-section physics
●Future LAr detectors can be competitive in proton decay studies and complementary in SN detection. (see K. Scholberg's and B. Wilson's talks, Wed)
ArgoNeuT data ●MicroBooNE will be able to quantify potential backgrounds and test reconstruction methods for nucleon decay and see SN neutrinos. γ interactions Physics R&D
6/7/14 A. M. Szelc, Neutrino 2014, Boston 19 TPC wires + PMTs
6/7/14 A. M. Szelc, Neutrino 2014, Boston 20 LArTPC Technology R&D in MicroBooNE
Cold Electronics ● These components are essential for the future multi-kTon LArTPC detectors! High voltage
UV Laser
A. Ereditato et al. ArXiv: 1304.6961 Non evacuated vessel 6/7/14 A. M. Szelc, Neutrino 2014, Boston 21 TPC push-in: Fri, 20th Dec, 2013
6/7/14 A. M. Szelc, Neutrino 2014, Boston 22 Cryostat welding Tue, 20th May, 2014
AFTER BEFORE
6/7/14 A. M. Szelc, Neutrino 2014, Boston 23 Near Future – the move to LArTF
● The building is ready. ● After final tests of all subsystems the Cryostat will move to the detector hall (week of june 23rd).
● Need to apply insulating foam and test all subsystems. ● 1-2 months for gas purge and cooling. - will start in the Fall!
6/7/14 A. M. Szelc, Neutrino 2014, Boston 24 Conclusions
● There is a vibrant LAr neutrino program at FNAL. ● First time LArTPC cross-section results are shown at Neutrino. ● We are laying the foundation of the long term vision of multi-kTon LAr neutrino detectors.
6/7/14 A. M. Szelc, Neutrino 2014, Boston 25 Thank You!
Columbia University Kansas State University New Mexico State University University of Texas at Austin Brookhaven Lab Nancy Bishop Tim Bolton Alistair McLean Son Cao Mary Bishai Leslie Camilleri Saima Farooq Tia Miceli Doug Davis Hucheng Chen David Caratelli Sowjanya Gollapinni Vassili Papavassiliou Junting Huang Kai Chen Cheng-Yi Chi Glenn Horton-Smith Stephen Pate Karol Lang Susan Duffin Jennet Dickinson David McKee Katherine Woodruff Rashid Mehdiyev Jason Farell Georgia Karagiorgi Francesco Lanni David Kaleko Los Alamos National Otterbein University Laboratory for High Energy Yichen Li Bill Seligman Laboratory Nathaniel Tagg Physics, University of Bern, David Lissauer Mike Shaevitz Gerry Garvey Switzerland George Mahler Bill Sippach Jackie Gonzales University of Oxford Antonio Ereditato Don Makowiecki Kathleen Tatum Wes Ketchum Giles Barr Igor Kreslo Joseph Mead Kazuhiro Terao Bill Louis Matt Bass Michele Weber Veljko Radeka Bill Willis Geoff Mills Roxanne Guenette Christoph Rudolf von Rohr Sergio Rescia Zarko Pavlovic Thomas Strauss Andres Ruga Fermilab Richard Van de Water University of Pittsburgh Jack Sondericker Roberto Acciarri Kevin Yarritu Steve Dytman Istituto Nazionale Craig Thorn Bruce Baller Donna Naples di Fisica Nucleare, Italy Bo Yu Dixon Bogert Massachusetts Institute Vittorio Paolone Flavio Cavanna Chao Zhang Ben Carls of Technology Ornella Palamara Michael Cooke William Barletta Princeton University University of Herb Greenlee Len Bugel Kirk McDonald Virginia Tech Cambridge Cat James Gabriel Collin Bill Sands Mindy Jen Andy Blake Eric James Janet Conrad Leonidas Kalousis John Marshall Hans Jostlein Christina Ignarra Saint Mary's University Camillo Mariani Mark Thomson Mike Kirby Ben Jones of Minnesota Sarah Lockwitz Jarrett Moon Paul Nienaber Yale University University of Chicago Byron Lundberg Matt Toups Corey Adams Will Foreman Alberto Marchionni Taritree Wongjirad SLAC Eric Church Johnny Ho Stephen Pordes Joshua Spitz Mark Convery Bonnie T. Fleming (*) David Schmitz Jennifer Raaf Brandon Eberly Ellen Klein Joseph Zennamo Gina Rameika Michigan State University Matt Graham Elena Gramellini Brian Rebel Carl Bromberg David Muller Ariana Hackenburg University of Cincinnati Anne Schukraft Dan Edmunds Yun Tse Tsai Elizabeth Himwich Ryan Grosso Steve Wolbers Brian Page Ornella Palamara Jason St. John Tingjun Yang Syracuse University Flavio Cavanna Randy Johnson Sam Zeller (*) Jonathan Asaadi Brooke Russell Bryce Littlejohn MicroBooNE and Jessica Esquivel Kinga Partyka ArgoNeuT collaborations Mitch Soderberg (*) Andrzej Szelc 6/7/14 A. M. Szelc, Neutrino 2014, Boston 26 Posters you should have seen:
118 44 Liquid Argon Time Projection Chambers: MicroBooNE and Future Prospects for Neutrino Oscillation Physics. - A. Hackenburg 374 48 Measuring particle momenta via Multiple Coulomb Scattering with the MicroBooNE Time Projection Chamber. - L. Kalousis 184 45 PMT Triggering and Readout for the MicroBooNE Experiment. - D. Kaleko 185 46 Readout Electronics for the Time Projection Chamber in the Microboone Experiment. - D. Caratelli. 208 47 Muon Neutrino Disappearance with MicroBooNE and LAr1-ND, - J. Zennamo 375 54 Electron Neutrino Appearance with Multiple LArTPCS on the Booster Neutrino Beam. - C. Adams 199 51 Investigating Surge Protection Devices to Protect Against Transient Over‐ voltages in Liquid Argon Time Projection Chambers. - J. Asaadi.
229 52 Liquid Argon Scintillation Studies with the Bo Test Stand. - B. Jones. 197 24 Argon spectral function implementation for LBNE/MicroBooNE. - C-M. Jen
117 49 LArIAT. - J. St. John.
209 50 Light readout system tests and simulations on the way towards light ‐ augmented calorimteric reconstruction and PID in LArIAT. - P. Kryczyński.
6/7/14 A. M. Szelc, Neutrino 2014, Boston 27 6/7/14 A. M. Szelc, Neutrino 2014, Boston 28 6/7/14 A. M. Szelc, Neutrino 2014, Boston 29 6/7/14 A. M. Szelc, Neutrino 2014, Boston 30 6/7/14 A. M. Szelc, Neutrino 2014, Boston 31 6/7/14 A. M. Szelc, Neutrino 2014, Boston 32 ArgoNeuT becomes LArIAT
LArIAT by running in an instrumented charged particle beam line will allow us to tag electrons, providing a clean sample of events (and higher statistics).
Electrons are found in tertiary beam. Photons generated via brehmsstrahlung in MC 1X0 1X0 pre-shower disk. Do not need shower containment e (This is only a small part of the Physics we will measure with LArIAT)
6/7/14 A. M. Szelc, Neutrino 2014, Boston 33 LAr1-ND, or MicroBooNE with a Near Detector
C. Adams, Yale C. Adams, Yale C. Adams, Yale
● A near detector, LAr1-ND sited in the existing SciBooNE hall can determine whether the MiniBooNE excess in neutrino mode is due to oscillation.
● Due to its proximity to the target hall, it is sufficient for it to run for one year to amass statistics much bigger than MicroBooNE
● To explain the excess in the anti-neutrino mode an additional far detector is necessary.
6/7/14 A. M. Szelc, Neutrino 2014, Boston 34 UV Laser
100 laser events
● UV Laser being installed to use for calibration.
● Allows mapping potential field distortions with a “track” guaranteed to be field map straight - muons can undergo multiple scattering.
● Laser goes in via optical feedthrough. after correction
● Internal mirror allows remote change of angle.
6/7/14 A. M. Szelc, Neutrino 2014, Boston 35 ArgoNeuT and MicroBooNE
ArgoNeuT MicroBooNE
Detector: LArTPC LArTPC
Neutrinos: SBN: NuMI SBN: Booster
Size: 40x45x90cm 230x256x1034cm 0.23 tons Active 87 tons Active Wires: 2 planes 3 planes - 4 mm pitch - 3mm pitch Electronics: Warm Cold
Light Readout: None 32 8'' PMTs
Timeline: Finished About to take data 6/7/14 A. M. Szelc, Neutrino 2014, Boston 36 Cold Electronics
● Cold electronics are the same as those to be used in LBNE. ● Lower noise, and allows driving the signal longer distances (important for future large detectors).
● Motherboards installed on the wire carrier boards.
● All channels tested, one feed-through at a time.
6/7/14 A. M. Szelc, Neutrino 2014, Boston 37 Photomultipliers
● Liquid argon produces scintillation light (40k photons/MeV).
● It is in the VUV range, so need a wavelength shifter to see it in PMTs.
● Using acrylic plates coated with TPB.
6/7/14 A. M. Szelc, Neutrino 2014, Boston 38