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1. Calorimetric classification of track-like signatures in liquid argon TPCs using MicroBooNE data

Author

The MicroBooNE collaboration, P. Abratenko, R. An, J. Anthony, J. Asaadi, A. Ashkenazi, S. Balasubramanian, B. Baller, C. Barnes, G. Barr, V. Basque, L. Bathe-Peters, O. Benevides Rodrigues, S. Berkman, A. Bhanderi, A. Bhat, M. Bishai, A. Blake, T. Bolton, L. Camilleri, D. Caratelli, I. Caro Terrazas, R. Castillo Fernandez, F. Cavanna, G. Cerati, Y. Chen, E. Church, D. Cianci, J. M. Conrad, M. Convery, L. Cooper-Troendle, J. I. Crespo-Anadón, M. Del Tutto, S. R. Dennis, D. Devitt, R. Diurba, R. Dorrill, K. Duffy, S. Dytman, B. Eberly, A. Ereditato, J. J. Evans, R. Fine, G. A. Fiorentini Aguirre, R. S. Fitzpatrick, B. T. Fleming, N. Foppiani, D. Franco, A. P. Furmanski, D. Garcia-Gamez, S. Gardiner, G. Ge, S. Gollapinni, O. Goodwin, E. Gramellini, P. Green, H. Greenlee, W. Gu, R. Guenette, P. Guzowski, L. Hagaman, E. Hall, P. Hamilton, O. Hen, G. A. Horton-Smith, A. Hourlier, R. Itay, C. James, X. Ji, L. Jiang, J. H. Jo, R. A. Johnson, Y.-J. Jwa, N. Kamp, N. Kaneshige, G. Karagiorgi, W. Ketchum, M. Kirby, T. Kobilarcik, I. Kreslo, R. LaZur, I. Lepetic, K. Li, Y. Li, K. Lin, B. R. Littlejohn, W. C. Louis, X. Luo, K. Manivannan, C. Mariani, D. Marsden, J. Marshall, D. A. Martinez Caicedo, K. Mason, A. Mastbaum, N. McConkey, V. Meddage, T. Mettler, K. Miller, J. Mills, K. Mistry, A. Mogan, T. Mohayai, J. Moon, M. Mooney, A. F. Moor, C. D. Moore, L. Mora Lepin, J. Mousseau, M. Murphy, D. Naples, A. Navrer-Agasson, R. K. Neely, J. Nowak, M. Nunes, O. Palamara, V. Paolone, A. Papadopoulou, V. Papavassiliou, S. F. Pate, A. Paudel, Z. Pavlovic, E. Piasetzky, I. D. Ponce-Pinto, S. Prince, X. Qian, J. L. Raaf, V. Radeka, A. Rafique, M. Reggiani-Guzzo, L. Ren, L. C. J. Rice, L. Rochester, J. Rodriguez Rondon, H. E. Rogers, M. Rosenberg, M. Ross-Lonergan, G. Scanavini, D. W. Schmitz, A. Schukraft, W. Seligman, M. H. Shaevitz, R. Sharankova, J. Sinclair, A. Smith, E. L. Snider, M. Soderberg, S. Söldner-Rembold, P. Spentzouris, J. Spitz, M. Stancari, J. St. John, T. Strauss, K. Sutton, S. Sword-Fehlberg, A. M. Szelc, N. Tagg, W. Tang, K. Terao, C. Thorpe, D. Totani, M. Toups, Y.-T. Tsai, M. A. Uchida, T. Usher, W. Van De Pontseele, B. Viren, M. Weber, H. Wei, Z. Williams, S. Wolbers, T. Wongjirad, M. Wospakrik, N. Wright, W. Wu, E. Yandel, T. Yang, G. Yarbrough, L. E. Yates, G. P. Zeller, J. Zennamo, and C. Zhang

Subjects
Other experiments, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The MicroBooNE liquid argon time projection chamber located at Fermilab is a neutrino experiment dedicated to the study of short-baseline oscillations, the measurements of neutrino cross sections in liquid argon, and to the research and development of this novel detector technology. Accurate and precise measurements of calorimetry are essential to the event reconstruction and are achieved by leveraging the TPC to measure deposited energy per unit length along the particle trajectory, with mm resolution. We describe the non-uniform calorimetric reconstruction performance in the detector, showing dependence on the angle of the particle trajectory. Such non-uniform reconstruction directly affects the performance of the particle identification algorithms which infer particle type from calorimetric measurements. This work presents a new particle identification method which accounts for and effectively addresses such non-uniformity. The newly developed method shows improved performance compared to previous algorithms, illustrated by a 93.7% proton selection efficiency and a 10% muon mis-identification rate, with a fairly loose selection of tracks performed on beam data. The performance is further demonstrated by identifying exclusive final states in ν μ CC interactions. While developed using MicroBooNE data and simulation, this method is easily applicable to future LArTPC experiments, such as SBND, ICARUS, and DUNE.

Published
2021
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2. Rejecting cosmic background for exclusive charged current quasi elastic neutrino interaction studies with Liquid Argon TPCs; a case study with the MicroBooNE detector

Author

C. Adams, M. Alrashed, R. An, J. Anthony, J. Asaadi, A. Ashkenazi, M. Auger, S. Balasubramanian, B. Baller, C. Barnes, G. Barr, M. Bass, F. Bay, A. Bhat, K. Bhattacharya, M. Bishai, A. Blake, T. Bolton, L. Camilleri, D. Caratelli, I. Caro Terrazas, R. Carr, R. Castillo Fernandez, F. Cavanna, G. Cerati, Y. Chen, E. Church, D. Cianci, E. O. Cohen, G. H. Collin, J. M. Conrad, M. Convery, L. Cooper-Troendle, J. I. Crespo-Anadón, M. Del Tutto, D. Devitt, A. Diaz, K. Duffy, S. Dytman, B. Eberly, A. Ereditato, L. Escudero Sanchez, J. Esquivel, J. J Evans, A. A. Fadeeva, R. S. Fitzpatrick, B. T. Fleming, D. Franco, A. P. Furmanski, D. Garcia-Gamez, V. Genty, D. Goeldi, S. Gollapinni, O. Goodwin, E. Gramellini, H. Greenlee, R. Grosso, R. Guenette, P. Guzowski, A. Hackenburg, P. Hamilton, O. Hen, J. Hewes, C. Hill, G. A. Horton-Smith, A. Hourlier, E.-C. Huang, C. James, J. Jan de Vries, X. Ji, L. Jiang, R. A. Johnson, J. Joshi, H. Jostlein, Y.-J. Jwa, G. Karagiorgi, W. Ketchum, B. Kirby, M. Kirby, T. Kobilarcik, I. Kreslo, I. Lepetic, Y. Li, A. Lister, B. R. Littlejohn, S. Lockwitz, D. Lorca, W. C. Louis, M. Luethi, B. Lundberg, X. Luo, A. Marchionni, S. Marcocci, C. Mariani, J. Marshall, J. Martin-Albo, D. A. Martinez Caicedo, A. Mastbaum, V. Meddage, T. Mettler, K. Mistry, A. Mogan, J. Moon, M. Mooney, C. D. Moore, J. Mousseau, M. Murphy, R. Murrells, D. Naples, P. Nienaber, J. Nowak, O. Palamara, V. Pandey, V. Paolone, A. Papadopoulou, V. Papavassiliou, S. F. Pate, Z. Pavlovic, E. Piasetzky, D. Porzio, G. Pulliam, X. Qian, J. L. Raaf, A. Rafique, L. Ren, L. Rochester, M. Ross-Lonergan, C. Rudolf von Rohr, B. Russell, G. Scanavini, D. W. Schmitz, A. Schukraft, W. Seligman, M. H. Shaevitz, R. Sharankova, J. Sinclair, A. Smith, E. L. Snider, M. Soderberg, S. Söldner-Rembold, S. R. Soleti, P. Spentzouris, J. Spitz, J. St. John, T. Strauss, K. Sutton, S. Sword-Fehlberg, A. M. Szelc, N. Tagg, W. Tang, K. Terao, M. Thomson, R. T. Thornton, M. Toups, Y.-T. Tsai, S. Tufanli, T. Usher, W. Van De Pontseele, R. G. Van de Water, B. Viren, M. Weber, H. Wei, D. A. Wickremasinghe, K. Wierman, Z. Williams, S. Wolbers, T. Wongjirad, K. Woodruff, T. Yang, G. Yarbrough, L. E. Yates, G. P. Zeller, J. Zennamo, and C. Zhang

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Cosmic ray (CR) interactions can be a challenging source of background for neutrino oscillation and cross-section measurements in surface detectors. We present methods for CR rejection in measurements of charged-current quasielastic-like (CCQE-like) neutrino interactions, with a muon and a proton in the final state, measured using liquid argon time projection chambers (LArTPCs). Using a sample of cosmic data collected with the MicroBooNE detector, mixed with simulated neutrino scattering events, a set of event selection criteria is developed that produces an event sample with minimal contribution from CR background. Depending on the selection criteria used a purity between 50 and 80% can be achieved with a signal selection efficiency between 50 and 25%, with higher purity coming at the expense of lower efficiency. While using a specific dataset and selection criteria values optimized for the MicroBooNE detector, the concepts presented here are generic and can be adapted for various studies of exclusive $$\nu _{\mu }$$ νμ CCQE interactions in LArTPCs.

Published
2019
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3. Comparison of $${\varvec{\nu }}_{\varvec{\mu }}-$$ νμ- Ar multiplicity distributions observed by MicroBooNE to GENIE model predictions

Author

C. Adams, R. An, J. Anthony, J. Asaadi, M. Auger, S. Balasubramanian, B. Baller, C. Barnes, G. Barr, M. Bass, F. Bay, A. Bhat, K. Bhattacharya, M. Bishai, A. Blake, T. Bolton, L. Camilleri, D. Caratelli, R. Castillo Fernandez, F. Cavanna, G. Cerati, H. Chen, Y. Chen, E. Church, D. Cianci, E. Cohen, G. H. Collin, J. M. Conrad, M. Convery, L. Cooper-Troendle, J. I. Crespo-Anadón, M. Del Tutto, D. Devitt, A. Diaz, S. Dytman, B. Eberly, A. Ereditato, L. Escudero Sanchez, J. Esquivel, J. J. Evans, A. A. Fadeeva, B. T. Fleming, W. Foreman, A. P. Furmanski, D. Garcia-Gamez, G. T. Garvey, V. Genty, D. Goeldi, S. Gollapinni, E. Gramellini, H. Greenlee, R. Grosso, R. Guenette, P. Guzowski, A. Hackenburg, P. Hamilton, O. Hen, J. Hewes, C. Hill, J. Ho, G. A. Horton-Smith, A. Hourlier, E.-C. Huang, C. James, J. Jan de Vries, L. Jiang, R. A. Johnson, J. Joshi, H. Jostlein, Y.-J. Jwa, D. Kaleko, G. Karagiorgi, W. Ketchum, B. Kirby, M. Kirby, T. Kobilarcik, I. Kreslo, Y. Li, A. Lister, B. R. Littlejohn, S. Lockwitz, D. Lorca, W. C. Louis, M. Luethi, B. Lundberg, X. Luo, A. Marchionni, S. Marcocci, C. Mariani, J. Marshall, D. A. Martinez Caicedo, A. Mastbaum, V. Meddage, T. Mettler, T. Miceli, G. B. Mills, A. Mogan, J. Moon, M. Mooney, C. D. Moore, J. Mousseau, M. Murphy, R. Murrells, D. Naples, P. Nienaber, J. Nowak, O. Palamara, V. Pandey, V. Paolone, A. Papadopoulou, V. Papavassiliou, S. F. Pate, Z. Pavlovic, E. Piasetzky, D. Porzio, G. Pulliam, X. Qian, J. L. Raaf, A. Rafique, L. Rochester, M. Ross-Lonergan, C. Rudolf von Rohr, B. Russell, D. W. Schmitz, A. Schukraft, W. Seligman, M. H. Shaevitz, J. Sinclair, A. Smith, E. L. Snider, M. Soderberg, S. Söldner-Rembold, S. R. Soleti, P. Spentzouris, J. Spitz, J. St. John, T. Strauss, K. Sutton, S. Sword-Fehlberg, A. M. Szelc, N. Tagg, W. Tang, K. Terao, M. Thomson, M. Toups, Y.-T. Tsai, S. Tufanli, T. Usher, W. Van De Pontseele, R. G. Van de Water, B. Viren, M. Weber, H. Wei, D. A. Wickremasinghe, K. Wierman, Z. Williams, S. Wolbers, T. Wongjirad, K. Woodruff, T. Yang, G. Yarbrough, L. E. Yates, G. P. Zeller, J. Zennamo, and C. Zhang

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract We measure a large set of observables in inclusive charged current muon neutrino scattering on argon with the MicroBooNE liquid argon time projection chamber operating at Fermilab. We evaluate three neutrino interaction models based on the widely used GENIE event generator using these observables. The measurement uses a data set consisting of neutrino interactions with a final state muon candidate fully contained within the MicroBooNE detector. These data were collected in 2016 with the Fermilab Booster Neutrino Beam, which has an average neutrino energy of $$800~\hbox {MeV}$$ 800MeV , using an exposure corresponding to $$ 5.0\times 10^{19}$$ 5.0×1019 protons-on-target. The analysis employs fully automatic event selection and charged particle track reconstruction and uses a data-driven technique to separate neutrino interactions from cosmic ray background events. We find that GENIE models consistently describe the shapes of a large number of kinematic distributions for fixed observed multiplicity.

Published
2019
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4. The Pandora multi-algorithm approach to automated pattern recognition of cosmic-ray muon and neutrino events in the MicroBooNE detector

Author

R. Acciarri, C. Adams, R. An, J. Anthony, J. Asaadi, M. Auger, L. Bagby, S. Balasubramanian, B. Baller, C. Barnes, G. Barr, M. Bass, F. Bay, M. Bishai, A. Blake, T. Bolton, L. Camilleri, D. Caratelli, B. Carls, R. Castillo Fernandez, F. Cavanna, H. Chen, E. Church, D. Cianci, E. Cohen, G. H. Collin, J. M. Conrad, M. Convery, J. I. Crespo-Anadón, M. Del Tutto, D. Devitt, S. Dytman, B. Eberly, A. Ereditato, L. Escudero Sanchez, J. Esquivel, A. A. Fadeeva, B. T. Fleming, W. Foreman, A. P. Furmanski, D. Garcia-Gamez, G. T. Garvey, V. Genty, D. Goeldi, S. Gollapinni, N. Graf, E. Gramellini, H. Greenlee, R. Grosso, R. Guenette, A. Hackenburg, P. Hamilton, O. Hen, J. Hewes, C. Hill, J. Ho, G. Horton-Smith, A. Hourlier, E.-C. Huang, C. James, J. Jan de Vries, C.-M. Jen, L. Jiang, R. A. Johnson, J. Joshi, H. Jostlein, D. Kaleko, G. Karagiorgi, W. Ketchum, B. Kirby, M. Kirby, T. Kobilarcik, I. Kreslo, A. Laube, Y. Li, A. Lister, B. R. Littlejohn, S. Lockwitz, D. Lorca, W. C. Louis, M. Luethi, B. Lundberg, X. Luo, A. Marchionni, C. Mariani, J. Marshall, D. A. Martinez Caicedo, V. Meddage, T. Miceli, G. B. Mills, J. Moon, M. Mooney, C. D. Moore, J. Mousseau, R. Murrells, D. Naples, P. Nienaber, J. Nowak, O. Palamara, V. Paolone, V. Papavassiliou, S. F. Pate, Z. Pavlovic, E. Piasetzky, D. Porzio, G. Pulliam, X. Qian, J. L. Raaf, A. Rafique, L. Rochester, C. Rudolf von Rohr, B. Russell, D. W. Schmitz, A. Schukraft, W. Seligman, M. H. Shaevitz, J. Sinclair, A. Smith, E. L. Snider, M. Soderberg, S. Söldner-Rembold, S. R. Soleti, P. Spentzouris, J. Spitz, J. St. John, T. Strauss, A. M. Szelc, N. Tagg, K. Terao, M. Thomson, M. Toups, Y.-T. Tsai, S. Tufanli, T. Usher, W. Van De Pontseele, R. G. Van de Water, B. Viren, M. Weber, D. A. Wickremasinghe, S. Wolbers, T. Wongjirad, K. Woodruff, T. Yang, L. Yates, G. P. Zeller, J. Zennamo, and C. Zhang

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The development and operation of liquid-argon time-projection chambers for neutrino physics has created a need for new approaches to pattern recognition in order to fully exploit the imaging capabilities offered by this technology. Whereas the human brain can excel at identifying features in the recorded events, it is a significant challenge to develop an automated, algorithmic solution. The Pandora Software Development Kit provides functionality to aid the design and implementation of pattern-recognition algorithms. It promotes the use of a multi-algorithm approach to pattern recognition, in which individual algorithms each address a specific task in a particular topology. Many tens of algorithms then carefully build up a picture of the event and, together, provide a robust automated pattern-recognition solution. This paper describes details of the chain of over one hundred Pandora algorithms and tools used to reconstruct cosmic-ray muon and neutrino events in the MicroBooNE detector. Metrics that assess the current pattern-recognition performance are presented for simulated MicroBooNE events, using a selection of final-state event topologies.

Published
2018
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5. Search for a Higgs Portal Scalar Decaying to Electron-Positron Pairs in the MicroBooNE Detector

Author

M. A. Uchida, A. F. Moor, G. Scanavini, J. Anthony, Xiaohui Qian, H. Y. Wei, M. Wospakrik, I. Ponce-Pinto, C. D. Moore, P. Guzowski, R. Itay, R. LaZur, J. Spitz, G. Karagiorgi, B. R. Littlejohn, G. P. Zeller, T. Mettler, John Marshall, K. Lin, H. Siegel, K. Mistry, N. Kamp, Michael T. Murphy, S. Gollapinni, G. Yarbrough, T. Wongjirad, J. Zennamo, N. Wright, J. Asaadi, R. Sharankova, J. Shi, Kate C. Miller, D. Franco, M. Reggiani-Guzzo, L. C. J. Rice, D. Marsden, R. Diurba, A. Mastbaum, A. Schukraft, X. Luo, M. Rosenberg, Veljko Radeka, W. Van De Pontseele, Xiaolu Ji, A. Bhanderi, S. Sword-Fehlberg, M. Soderberg, Z. Pavlovic, N. Kaneshige, B.T. Fleming, E. Gramellini, M. Stancari, S. Söldner-Rembold, Y.-T. Tsai, M. E. Convery, T. Kobilarcik, W. Q. Gu, R. An, J. A. Nowak, D. Naples, M. Del Tutto, K. Wresilo, R. S. Fitzpatrick, D. Cianci, G. Ge, Thomas Strauss, R. Dorrill, V. Meddage, Kazuhiro Terao, A. Paudel, K. Mason, E. Piasetzky, R. Guenette, S. Dennis, E. Yandel, N. Foppiani, D. Garcia-Gamez, R. Fine, O. Goodwin, Giuseppe Benedetto Cerati, I. Lepetic, M. Ross-Lonergan, C. Mariani, S. F. Pate, P. Abratenko, Janet Conrad, Andrew Blake, C. Thorpe, L. Jiang, G. A. Fiorentini Aguirre, J. Y. Book, Antonio Ereditato, S. Balasubramanian, H. Greenlee, A. Hourlier, F. Cavanna, W. Ketchum, M. Kirby, T. Yang, J. L. Raaf, V. Basque, A. P. Furmanski, J. Mills, Yichen Li, K. Sutton, S. Wolbers, Yi Chen, T. Usher, B. Baller, L. Rochester, D. Devitt, Wei Wu, A. Navrer-Agasson, William Tang, L. Hagaman, C. James, B. Eberly, Panagiotis Spentzouris, V. Papavassiliou, M. Mooney, A. M. Szelc, Or Hen, C. Zhang, D. A. Martinez Caicedo, L. Bathe-Peters, W. G. Seligman, L.E. Yates, L. Ren, M. Toups, Steven Gardiner, E. D. Hall, J. Moon, J. Rodriguez Rondon, W. C. Louis, T. A. Bolton, L. Camilleri, J. Sinclair, B. Viren, J. I. Crespo-Anadón, Z. Williams, S. Berkman, S. A. Dytman, C. Barnes, K. E. Duffy, A. Rafique, J. Mousseau, D. W. Schmitz, O. Benevides Rodrigues, D. Totani, Marc Weber, T. A. Mohayai, S. Prince, M. Bishai, L. Mora Lepin, G. A. Horton-Smith, N. Tagg, J. H. Jo, J. St. John, R. Castillo Fernandez, Ornella Palamara, R. A. Johnson, K. Manivannan, L. Cooper-Troendle, G.D. Barr, K. Li, D. Caratelli, E.L. Snider, M. Nunes, Avi Ashkenazi, M. H. Shaevitz, I. Caro Terrazas, N. McConkey, Andrew Smith, I. Kreslo, A. Mogan, R. K. Neely, Afroditi Papadopoulou, V. Paolone, Patrick Green, Y.-J. Jwa, John Evans, A. Bhat, H. E. Rogers, and MicroBooNE Collaboration

Subjects
Particle physics, Physics::Instrumentation and Detectors, 530 Physics, Scalar (mathematics), Hadron, General Physics and Astronomy, FOS: Physical sciences, Context (language use), 7. Clean energy, 01 natural sciences, NuMI, Standard Model, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Fermilab, 010306 general physics, QC, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Scalar boson, 3. Good health, High Energy Physics - Phenomenology, Higgs boson, Physics::Accelerator Physics, High Energy Physics::Experiment
Abstract

This document was prepared by the MicroBooNE collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. MicroBooNE is supported by the following: the U.S. Department of Energy, Office of Science, Offices of High Energy Physics and Nuclear Physics; the U.S. National Science Foundation; the Swiss National Science Foundation; the Science and Technology Facilities Council (STFC), part of the United Kingdom Research and Innovation; and The Royal Society (United Kingdom). Additional support for the laser calibration system and cosmic ray tagger was provided by the Albert Einstein Center for Fundamental Physics, Bern, Switzerland. Participation of individual researchers in this project is supported by funds from the European Unions Horizon 2020 Research and Innovation Programme under the Marie SklodowskaCurie Grant Agreement No. 752309. We thank Brian Batell, Joshua Berger, and Ahmed Ismail for outlining the search strategy., We present a search for the decays of a neutral scalar boson produced by kaons decaying at rest, in the context of the Higgs portal model, using the MicroBooNE detector. We analyze data triggered in time with the Fermilab NuMI neutrino beam spill, with an exposure of 1.93 x 10(20) protons on target. We look for monoenergetic scalars that come from the direction of the NuMI hadron absorber, at a distance of 100 m from the detector, and decay to electron-positron pairs. We observe one candidate event, with a standard model background prediction of 1.9 +/- 0.8. We set an upper limit on the scalar-Higgs mixing angle of theta < (3.3 - 4.6) x 10(-4) at the 95% confidence level for scalar boson masses in the range (100-200) MeV/c(2). We exclude, at the 95% confidence level, the remaining model parameters required to explain the central value of a possible excess of K-L(0) -> pi(0)nu(nu) over bar decays reported by the KOTO collaboration. We also provide a model-independent limit on a new boson X produced in K -> pi X decays and decaying to e(+)e(-)., Fermi Research Alliance, LLC (FRA) DE-AC02-07CH11359, United States Department of Energy (DOE), National Science Foundation (NSF), Swiss National Science Foundation (SNSF), European Commission, Science and Technology Facilities Council (STFC), part of the United Kingdom Research and Innovation, Royal Society of London, Albert Einstein Center for Fundamental Physics, Bern, Switzerland, SKA South Africa 752309

Published
2021

6. Cosmic Ray Background Rejection with Wire-Cell LArTPC Event Reconstruction in the MicroBooNE Detector

Author

D. Cianci, A. Hourlier, G. Yarbrough, W. Q. Gu, R. S. Fitzpatrick, T. Kobilarcik, G. Scanavini, M. Del Tutto, P. M. Hamilton, Antonio Ereditato, W. G. Seligman, M. E. Convery, Yichen Li, William Tang, R. Dorrill, B. Eberly, M. Toups, A. Marchionni, K. Mason, M. Bishai, W. C. Louis, M. Kirby, E. Yandel, J. Martín-Albo, E.L. Snider, Xiaohui Qian, H. Y. Wei, G. Karagiorgi, L.S. Rochester, T. L. Usher, Panagiotis Spentzouris, Steven Gardiner, S.R. Soleti, S. Berkman, E. Church, Laura Dominé, B. Viren, R. An, M. Soderberg, L. Ren, J. Mousseau, W. Ketchum, P. Nienaber, L. Escudero Sanchez, A. Mastbaum, E.-C. Huang, J. Anthony, C. Barnes, A. Rafique, Yi Chen, P. Guzowski, E. D. Hall, B. Russell, B. T. Fleming, S. Prince, G. P. Zeller, Afroditi Papadopoulou, T. Wongjirad, H. E. Rogers, J. Moon, J. Zennamo, T. Mettler, John Marshall, J. L. Raaf, D. Devitt, K. E. Duffy, D. Garcia-Gamez, N. Kamp, K. Mistry, M. Rosenberg, O. Benevides Rodrigues, L. Cooper-Troendle, W. Van De Pontseele, P. Abratenko, T. A. Mohayai, R. Castillo Fernandez, G. A. Horton-Smith, S. A. Dytman, D. A. Martinez Caicedo, L. Mora Lepin, N. McConkey, R. Diurba, Ornella Palamara, R. A. Johnson, M. Alrashed, J. Jan de Vries, J. St. John, A. P. Furmanski, D. Marsden, I. Ponce-Pinto, I. Lepetic, M. Ross-Lonergan, C. D. Moore, D. Naples, Kazuhiro Terao, A. Paudel, Chao Zhang, E. Piasetzky, Giuseppe Benedetto Cerati, D. Porzio, G. A. Fiorentini Aguirre, Andrew Smith, Janet Conrad, Andrew Blake, C. Thorpe, L. Jiang, S. Tufanli, Y.-J. Jwa, L. Bathe-Peters, Xiaolu Ji, Avi Ashkenazi, S. Wolbers, L.E. Yates, S. Söldner-Rembold, A. M. Szelc, Veljko Radeka, M. Reggiani-Guzzo, A. Bhanderi, N. Kaneshige, S. F. Pate, S. Sword-Fehlberg, T. A. Bolton, Y. T. Tsai, S. Gollapinni, L. Camilleri, R. LaZur, J. Sinclair, M. H. Shaevitz, J. I. Crespo-Anadón, X. Luo, V. Meddage, I. Kreslo, I. Caro Terrazas, R. Itay, G. Ge, Michael T. Murphy, S. Balasubramanian, Thomas Strauss, M. Wospakrik, John Evans, O. Goodwin, D. W. Schmitz, B. Baller, T. Yang, D. Lorca, R. Guenette, Marc Weber, C. James, V. Basque, V. Papavassiliou, M. Mooney, A. F. Moor, H. W. Yu, V. Paolone, J. Mills, R. Sharankova, K. Li, F. Cavanna, Wei Wu, E. Gramellini, D. Franco, A. Schukraft, J. Asaadi, B. R. Littlejohn, A. Mogan, A. Navrer-Agasson, M. Stancari, Z. Pavlovic, J. Rodriguez Rondon, Kate C. Miller, L. Hagaman, J. Spitz, R. K. Neely, Or Hen, J. A. Nowak, Z. Williams, Patrick Green, M. A. Uchida, N. Foppiani, C. Mariani, H. Greenlee, K. Sutton, B. Kirby, N. Tagg, J. H. Jo, G.D. Barr, D. Caratelli, A. Bhat, and Collaboration, MicroBooNE

Subjects
Physics, Physics - Instrumentation and Detectors, Time projection chamber, COSMIC cancer database, Astrophysics::High Energy Astrophysical Phenomena, Detector, FOS: Physical sciences, General Physics and Astronomy, Flux, Cosmic ray, Instrumentation and Detectors (physics.ins-det), 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Visible energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, 0210 nano-technology, Event reconstruction
Abstract

For a large liquid-argon time-projection chamber (LArTPC) operating on or near the Earth's surface to detect neutrino interactions, the rejection of cosmogenic background is a critical and challenging task because of the large cosmic-ray flux and the long drift time of the time-projection chamber. We introduce a superior cosmic background rejection procedure based on the Wire-Cell three-dimensional (3D) event reconstruction for LArTPCs. From an initial 1:20 000 neutrino to cosmic-ray background ratio, we demonstrate these tools on data from the MicroBooNE experiment and create a high-performance generic neutrino event selection with a cosmic contamination of 14.9% (9.7%) for a visible energy region greater than O(200) MeV. The neutrino interaction selection efficiency is 80.4% and 87.6% for inclusive νμ charged-current and νe charged-current interactions, respectively. This significantly improved performance compared with existing reconstruction algorithms marks a major milestone toward reaching the scientific goals of LArTPC neutrino oscillation experiments operating near the Earth's surface.

Published
2021

7. Measurement of the Longitudinal Diffusion of Ionization Electrons in the MicroBooNE Detector

Author

G. Karagiorgi, W. Q. Gu, R. S. Fitzpatrick, N. Foppiani, Afroditi Papadopoulou, M. Reggiani-Guzzo, C. Mariani, M. Bishai, H. Greenlee, M. Rosenberg, K. Sutton, E.L. Snider, P. Guzowski, M. Kirby, Yichen Li, William Tang, Xiaolu Ji, M. Toups, K. Lin, B. R. Littlejohn, S. Prince, C. D. Moore, T. A. Bolton, A. Bhanderi, Y. T. Tsai, L. Bathe-Peters, L. Camilleri, S. Sword-Fehlberg, L.E. Yates, T. Kobilarcik, G. Scanavini, N. Kamp, G. A. Horton-Smith, G. Ge, L. Ren, Thomas Strauss, P. M. Hamilton, A. Hourlier, M. Del Tutto, B. Eberly, D. Franco, J. Sinclair, Marc Weber, J. Asaadi, J. I. Crespo-Anadón, Kate C. Miller, D. A. Martinez Caicedo, K. E. Duffy, T. Yang, O. Benevides Rodrigues, D. Totani, A. Mogan, Giuseppe Benedetto Cerati, C. Zhang, V. Basque, L.S. Rochester, T. L. Usher, Panagiotis Spentzouris, D. W. Schmitz, W. Ketchum, T. A. Mohayai, L. Mora Lepin, W. C. Louis, Antonio Ereditato, W. G. Seligman, P. Abratenko, A. P. Furmanski, R. Guenette, L. C. J. Rice, R. Sharankova, A. Schukraft, R. An, J. Anthony, N. Tagg, J. H. Jo, A. F. Moor, Y.-J. Jwa, E. D. Hall, K. Mistry, J. Moon, M. Nunes, G.D. Barr, R. K. Neely, R. Dorrill, S. A. Dytman, D. Caratelli, F. Cavanna, S. Berkman, C. Barnes, Z. Pavlovic, A. Rafique, E. Yandel, T. Wongjirad, Veljko Radeka, A. Mastbaum, J. St. John, M. Soderberg, Michael T. Murphy, K. Mason, Wei Wu, S. F. Pate, A. Lister, D. Naples, John Evans, Kazuhiro Terao, K. Manivannan, B. Baller, Andrew Blake, C. Thorpe, A. Paudel, L. Jiang, S. Gollapinni, E. Piasetzky, R. LaZur, Avi Ashkenazi, V. Paolone, G. Yarbrough, A. M. Szelc, S. Dennis, D. Garcia-Gamez, G. A. Fiorentini Aguirre, Janet Conrad, E. Gramellini, C. James, M. H. Shaevitz, I. Caro Terrazas, R. Itay, Steven Gardiner, M. Stancari, S. Wolbers, R. Castillo Fernandez, V. Papavassiliou, M. Mooney, M. Wospakrik, Xiaohui Qian, Patrick Green, Ornella Palamara, R. A. Johnson, G. P. Zeller, H. Y. Wei, J. Spitz, B. Viren, J. Mousseau, B. T. Fleming, D. Cianci, I. Lepetic, J. Zennamo, N. Wright, A. Bhat, M. E. Convery, M. Ross-Lonergan, T. Mettler, John Marshall, L. Cooper-Troendle, W. Van De Pontseele, I. D. Ponce-Pinto, H. E. Rogers, Yi Chen, R. Diurba, J. A. Nowak, S. Söldner-Rembold, E. Church, R. Fine, J. L. Raaf, D. Devitt, K. Li, X. Luo, S. Balasubramanian, L. Hagaman, M. A. Uchida, D. Marsden, N. Kaneshige, V. Meddage, N. McConkey, O. Goodwin, Andrew Smith, I. Kreslo, J. Mills, A. Navrer-Agasson, J. Rodriguez Rondon, Or Hen, Z. Williams, and collaboration, The MicroBooNE

Subjects
Physics, Muon, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, 530 Physics, Detector, Time projection Chambers (TPC), FOS: Physical sciences, Cosmic ray, Instrumentation and Detectors (physics.ins-det), Electron, Noble liquid detectors (scintillation, ionization, double-phase), Ion, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Charge transport and multiplication in liquid media, Electric field, Ionization, Diffusion (business), Instrumentation, QC, Mathematical Physics
Abstract

This document was prepared by the MicroBooNE collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. MicroBooNE is supported by the following: the U.S. Department of Energy, Office of Science, Offices of High Energy Physics and Nuclear Physics; the U.S. National Science Foundation; the Swiss National Science Foundation; the Science and Technology Facilities Council (STFC), part of the United Kingdom Research and Innovation; and The Royal Society (United Kingdom). Additional support for the laser calibration system and cosmic ray tagger was provided by the Albert Einstein Center for Fundamental Physics, Bern, Switzerland., Accurate knowledge of electron transport properties is vital to understanding the information provided by liquid argon time projection chambers (LArTPCs). Ionization electron drift-lifetime, local electric field distortions caused by positive ion accumulation, and electron diffusion can all significantly impact the measured signal waveforms. This paper presents a measurement of the effective longitudinal electron diffusion coefficient, D-L, in MicroBooNE at the nominal electric field strength of 273.9 V/cm. Historically, this measurement has been made in LArTPC prototype detectors. This represents the first measurement in a large-scale (85 tonne active volume) LArTPC operating in a neutrino beam. This is the largest dataset ever used for this measurement. Using a sample of similar to 70,000 through-going cosmic ray muon tracks tagged with MicroBooNE's cosmic ray tagger system, we measure D-L = 3.74(-0.29)(+0.28) cm(2)/s., Fermi Research Alliance, LLC (FRA) DE-AC02-07CH11359, United States Department of Energy (DOE), National Science Foundation (NSF), Swiss National Science Foundation (SNSF), European Commission, Science and Technology Facilities Council (STFC), part of the United Kingdom Research and Innovation, Royal Society of London, Albert Einstein Center for Fundamental Physics, Bern, Switzerland

Published
2021

8. Measurement of Space Charge Effects in the MicroBooNE LArTPC Using Cosmic Muons

Author

M. Soderberg, G. A. Fiorentini Aguirre, Or Hen, Janet Conrad, B.T. Fleming, Z. Williams, R. S. Fitzpatrick, A. Mastbaum, E.-C. Huang, A. Mogan, M. Del Tutto, M. E. Convery, G. Karagiorgi, S. Berkman, C. Barnes, A. Rafique, N. McConkey, Andrew Smith, I. Kreslo, R. K. Neely, S. Wolbers, R. T. Thornton, A. Marchionni, P. Abratenko, P. Nienaber, A. Bhat, Yang Li, S. Dytman, D. Garcia-Gamez, Antonio Ereditato, A. P. Furmanski, V. Meddage, G. P. Zeller, R. Castillo Fernandez, B. Eberly, M. A. Uchida, Panagiotis Spentzouris, Ornella Palamara, R. A. Johnson, M. Rosenberg, T. Mettler, John Marshall, L. Ren, H. Y. Wei, L. Escudero Sanchez, B. Russell, O. Goodwin, Afroditi Papadopoulou, W. Ketchum, A. Hourlier, H. E. Rogers, J. Anthony, I. Lepetic, D. Cianci, L. Cooper-Troendle, L. Domine, Avi Ashkenazi, K. E. Duffy, J. Martín-Albo, O. Benevides Rodrigues, R. Diurba, E.L. Snider, S. F. Pate, Xin Qian, R. Guenette, J. Zennamo, T. A. Mohayai, D. Porzio, J. Mills, K. Mistry, Xiaolu Ji, Y.-J. Jwa, L. Rochester, M. H. Shaevitz, J. St. John, M. Bishai, C.D. Moore, J. Moon, I. Caro Terrazas, A. M. Szelc, A. Navrer-Agasson, P. M. Hamilton, A. Bhanderi, W. Van De Pontseele, S. Sword-Fehlberg, T. Yang, M. Reggiani-Guzzo, F. Cavanna, Veljko Radeka, John Evans, J. Rodriguez Rondon, C. James, S. Söldner-Rembold, T. Wongjirad, V. Papavassiliou, M. Mooney, V. Paolone, D. Naples, J. L. Raaf, V. Basque, Wei Wu, M. Ross-Lonergan, Thomas Strauss, S. Gollapinni, William Tang, R. An, B. R. Littlejohn, W. C. Louis, M. Wospakrik, D. Devitt, M. Toups, L. Gu, Patrick Green, L. Bathe-Peters, L.E. Yates, J. Jan de Vries, A. F. Moor, Michael H Kirby, T. Kobilarcik, G. Yarbrough, J. Asaadi, G. Scanavini, D. Franco, I. Ponce-Pinto, Kate C. Miller, T. Usher, X. Luo, R. G. Van de Water, B. Baller, L. Camilleri, J. Sinclair, Giuseppe Benedetto Cerati, J. I. Crespo-Anadón, W. Gu, R. Dorrill, D. W. Schmitz, R. LaZur, K. Mason, Andrew Blake, C. Thorpe, L. Jiang, K. Li, J. A. Nowak, Marc Weber, S. Tufanli, N. Foppiani, C. Mariani, D. Lorca, S. Prince, D. A. Martinez Caicedo, Yi Chen, Kazuhiro Terao, H. Greenlee, R. Sharankova, G. A. Horton-Smith, A. Paudel, E. Piasetzky, A. Schukraft, K. Sutton, B. Kirby, T. Bolton, E. Hall, Michael T. Murphy, Z. Pavlovic, D. Marsden, M. Alrashed, J. Spitz, Chao Zhang, P. Guzowski, R. Itay, E. Gramellini, S. Marcocci, M. Stancari, S. Balasubramanian, Y.-T. Tsai, N. Kamp, Eliahu Cohen, E. Church, N. Tagg, J. H. Jo, G.D. Barr, D. Caratelli, Steven Gardiner, S.R. Soleti, B. Viren, and J. Mousseau

Subjects
Physics, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, 530 Physics, Monte Carlo method, Detector, FOS: Physical sciences, Context (language use), Cosmic ray, Electron, Instrumentation and Detectors (physics.ins-det), 530 Physik, 01 natural sciences, Space charge, 030218 nuclear medicine & medical imaging, Computational physics, High Energy Physics - Experiment, 03 medical and health sciences, High Energy Physics - Experiment (hep-ex), 0302 clinical medicine, Electric field, Ionization, 0103 physical sciences, Instrumentation, Mathematical Physics
Abstract

Large liquid argon time projection chambers (LArTPCs), especially those operating near the surface, are susceptible to space charge effects. In the context of LArTPCs, the space charge effect is the build-up of slow-moving positive ions in the detector primarily due to ionization from cosmic rays, leading to a distortion of the electric field within the detector. This effect leads to a displacement in the reconstructed position of signal ionization electrons in LArTPC detectors ("spatial distortions"), as well as to variations in the amount of electron-ion recombination experienced by ionization throughout the volume of the TPC. We present techniques that can be used to measure and correct for space charge effects in large LArTPCs by making use of cosmic muons, including the use of track pairs to unambiguously pin down spatial distortions in three dimensions. The performance of these calibration techniques are studied using both Monte Carlo simulation and MicroBooNE data, utilizing a UV laser system as a means to estimate the systematic bias associated with the calibration methodology., Comment: 38 pages, 25 figures

Published
2020

9. First Measurement of Differential Charged Current Quasielasticlike νμ -Argon Scattering Cross Sections with the MicroBooNE Detector

Author

S. Marcocci, M. Kirby, L. Ren, D. A. Martinez Caicedo, S. Balasubramanian, K. Mistry, R. Sharankova, Avi Ashkenazi, M. Ross-Lonergan, J. St. John, G. A. Fiorentini Aguirre, A. Schukraft, V. Meddage, Eliahu Cohen, O. Goodwin, W. Ketchum, Veljko Radeka, M. H. Shaevitz, I. Caro Terrazas, S. Wolbers, N. Foppiani, M. Bishai, C. Mariani, G. Yarbrough, P. Abratenko, A. P. Furmanski, R. An, P. M. Hamilton, K. Li, H. Greenlee, C. Barnes, A. Rafique, A. Mogan, T. Yang, A. Hourlier, V. Basque, M. A. Uchida, K. Sutton, B. Kirby, B. Eberly, Xiaolu Ji, A. M. Szelc, T. A. Bolton, L. Camilleri, V. Paolone, A. Bhanderi, S. Sword-Fehlberg, Thomas Strauss, P. Guzowski, S. Gollapinni, A. Mastbaum, S. F. Pate, B.T. Fleming, E.-C. Huang, R. Itay, J. Martín-Albo, T. Usher, L. Bathe-Peters, E.L. Snider, Patrick Green, J. Anthony, G. Karagiorgi, D. Franco, X. Luo, R. LaZur, B. Baller, K. E. Duffy, O. Benevides Rodrigues, W. Q. Gu, R. S. Fitzpatrick, W. C. Louis, P. Nienaber, J. Asaadi, Marc Weber, N. Kamp, A. F. Moor, G. Scanavini, Xiaohui Qian, H. Y. Wei, L. Escudero Sanchez, I. Lepetic, E. Church, J. Mills, L. Rochester, R. Dorrill, Z. Pavlovic, A. Navrer-Agasson, L.E. Yates, L. Domine, R. Castillo Fernandez, Ornella Palamara, R. A. Johnson, S. Prince, A. Marchionni, K. Mason, D. Garcia-Gamez, T. A. Mohayai, S. Berkman, Y.-J. Jwa, D. Naples, Kazuhiro Terao, A. Paudel, J. Jan de Vries, E. Piasetzky, J. Rodriguez Rondon, Steven Gardiner, J. Zennamo, L. Cooper-Troendle, S. Tufanli, M. Rosenberg, J. L. Raaf, D. Cianci, D. Marsden, R. K. Neely, J. Sinclair, John Evans, T. Wongjirad, G. P. Zeller, J. Spitz, M. Soderberg, A. Bhat, S.R. Soleti, D. Devitt, Yi Chen, J. I. Crespo-Anadón, T. Mettler, John Marshall, B. Viren, W. Van De Pontseele, M. Reggiani-Guzzo, R. Diurba, I. Ponce-Pinto, J. Mousseau, H. E. Rogers, G. A. Horton-Smith, Or Hen, Andrew Blake, C. Thorpe, L. Jiang, M. Wospakrik, C. James, C. D. Moore, M. E. Convery, T. Kobilarcik, D. Porzio, Z. Williams, D. W. Schmitz, Chao Zhang, V. Papavassiliou, M. Mooney, R. G. Van de Water, S. Söldner-Rembold, N. McConkey, Giuseppe Benedetto Cerati, Andrew Smith, J. A. Nowak, B. R. Littlejohn, M. Alrashed, I. Kreslo, Yichen Li, Panagiotis Spentzouris, William Tang, E. D. Hall, M. Del Tutto, Kate C. Miller, M. Toups, J. Moon, S. A. Dytman, L. Gu, Janet Conrad, B. Russell, Afroditi Papadopoulou, D. Lorca, R. Guenette, Antonio Ereditato, R. T. Thornton, Michael T. Murphy, F. Cavanna, Wei Wu, E. Gramellini, N. Tagg, J. H. Jo, M. Stancari, Y.-T. Tsai, G.D. Barr, and D. Caratelli

Subjects
Physics, Muon, Time projection chamber, Proton, Physics::Instrumentation and Detectors, Scattering, General Physics and Astronomy, Nuclear physics, Cross section (physics), Pion, Physics::Accelerator Physics, High Energy Physics::Experiment, Muon neutrino, Charged current
Abstract

We report on the first measurement of flux-integrated single differential cross sections for charged-current (CC) muon neutrino (ν_{μ}) scattering on argon with a muon and a proton in the final state, ^{40}Ar (ν_{μ},μp)X. The measurement was carried out using the Booster Neutrino Beam at Fermi National Accelerator Laboratory and the MicroBooNE liquid argon time projection chamber detector with an exposure of 4.59×10^{19} protons on target. Events are selected to enhance the contribution of CC quasielastic (CCQE) interactions. The data are reported in terms of a total cross section as well as single differential cross sections in final state muon and proton kinematics. We measure the integrated per-nucleus CCQE-like cross section (i.e., for interactions leading to a muon, one proton, and no pions above detection threshold) of (4.93±0.76_{stat}±1.29_{sys})×10^{-38} cm^{2}, in good agreement with theoretical calculations. The single differential cross sections are also in overall good agreement with theoretical predictions, except at very forward muon scattering angles that correspond to low-momentum-transfer events.

Published
2020

10. Reconstruction and measurement of (100) MeV energy electromagnetic activity from π0 arrow γγ decays in the MicroBooNE LArTPC

Author

D. Garcia-Gamez, A. Bhat, W. C. Louis, S. F. Pate, L.E. Yates, A. P. Furmanski, J. Sinclair, J. I. Crespo-Anadón, N. Foppiani, C. Mariani, D. W. Schmitz, Yichen Li, J. Jan de Vries, G. P. Zeller, William Tang, D. Lorca, R. Guenette, Andrew Blake, F. Cavanna, Lei Jiang, Wei Wu, J. Asaadi, T. Mettler, K. Mason, C. Rudolf von Rohr, C. James, H. Greenlee, M. Toups, John Marshall, V. Papavassiliou, M. Mooney, Xiaohui Qian, K. Sutton, Z. Pavlovic, H. Y. Wei, L. Escudero Sanchez, B. Kirby, A. Mastbaum, L. Gu, Giuseppe Benedetto Cerati, J. J. Evans, S. Marcocci, Avi Ashkenazi, B. T. Fleming, B. R. Littlejohn, G. Pulliam, Xiaolu Ji, V. Genty, W. Ketchum, D. Porzio, T. Usher, J. Zennamo, C. Adams, A. M. Szelc, A. Bhanderi, Colin Hill, Yi Chen, S. Sword-Fehlberg, Janet Conrad, M. Bishai, M. H. Shaevitz, I. Caro Terrazas, A. Hourlier, L. Cooper-Troendle, W. Van De Pontseele, R. Itay, M. Bass, N. Tagg, J. H. Jo, Thomas Strauss, G. Karagiorgi, P. Nienaber, S. Tufanli, Alejandro Diaz, V. Paolone, M. Luethi, R. T. Thornton, Kate C. Miller, K. Woodruff, S. Söldner-Rembold, J. Martín-Albo, E.L. Snider, Michael T. Murphy, R. S. Fitzpatrick, J. L. Raaf, Afroditi Papadopoulou, M. Ross-Lonergan, T. A. Bolton, L. Camilleri, V. Meddage, E. Gramellini, M. Kirby, Eliahu Cohen, T. Yang, R. An, G.D. Barr, P. Guzowski, O. Goodwin, Y.-T. Tsai, E.-C. Huang, B. Russell, G. Yarbrough, L. Ren, V. Basque, K. Mistry, S. Prince, F. Bay, H.E. Rogers, M. Stancari, D. Caratelli, T. Kobilarcik, D. Devitt, A. Marchionni, S. Wolbers, D.A. Wickremasinghe, K. E. Duffy, B. Lundberg, G. Scanavini, T. Wongjirad, S. Lockwitz, J. Mills, T. A. Mohayai, G. A. Horton-Smith, C. D. Moore, E. Church, R. Murrells, R. Grosso, D. Franco, A. Mogan, W. Gu, J. St. John, S. Balasubramanian, L. Rochester, Marc Weber, A. Lister, M. Alrashed, M. E. Convery, B. Eberly, Chao Zhang, L. Domine, P. Green, R. Carr, R. K. Neely, R. Sharankova, J. Anthony, X. Luo, Y.-J. Jwa, I. Lepetic, W. G. Seligman, A. Schukraft, Steven Gardiner, S.R. Soleti, D. Goeldi, B. Viren, J. Mousseau, D. A. Martinez Caicedo, M. Del Tutto, J. Spitz, Antonio Ereditato, S. Gollapinni, M. Soderberg, S. Berkman, C. Barnes, A. Rafique, Or Hen, R. Castillo Fernandez, Ornella Palamara, R. A. Johnson, D. Cianci, Z. Williams, N. McConkey, Andrew Smith, I. Kreslo, D. Naples, Kazuhiro Terao, A. Paudel, E. Piasetzky, M. Wospakrik, R. G. Van de Water, Vishvas Pandey, J. A. Nowak, J. Esquivel, Panagiotis Spentzouris, J. Moon, S. A. Dytman, J. Joshi, B. Baller, and P. M. Hamilton

Subjects
Physics, 010308 nuclear & particles physics, Noble liquid detectors (scintillation, ionization, double-phase), Pattern recognition, cluster finding, calibration and fitting methods, Performance of High Energy Physics Detectors, Time projection chambers, double-phase), calibration and fitting methods, 01 natural sciences, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Noble liquid detectors (scintillation, cluster finding, Pattern recognition, 0103 physical sciences, ionization, Instrumentation, Mathematical Physics, Mathematical physics
Abstract

Author(s): Adams, C; Alrashed, M; An, R; Anthony, J; Asaadi, J; Ashkenazi, A; Balasubramanian, S; Baller, B; Barnes, C; Barr, G; Basque, V; Bass, M; Bay, F; Berkman, S; Bhanderi, A; Bhat, A; Bishai, M; Blake, A; Bolton, T; Camilleri, L; Caratelli, D; Terrazas, IC; Carr, R; Fernandez, RC; Cavanna, F; Cerati, G; Chen, Y; Church, E; Cianci, D; Cohen, EO; Conrad, JM; Convery, M; Cooper-Troendle, L; Crespo-Anadon, JI; Tutto, MD; Devitt, D; Diaz, A; Domine, L; Duffy, K; Dytman, S; Eberly, B; Ereditato, A; Sanchez, LE; Esquivel, J; Evans, JJ; Fitzpatrick, RS; Fleming, BT; Foppiani, N; Franco, D; Furmanski, AP; Garcia-Gamez, D; Gardiner, S; Genty, V; Goeldi, D; Gollapinni, S; Goodwin, O; Gramellini, E; Green, P; Greenlee, H; Grosso, R; Gu, L; Gu, W; Guenette, R; Guzowski, P; Hamilton, P; Hen, O; Hill, C; Horton-Smith, GA; Hourlier, A; Huang, EC; Itay, R; James, C; De Vries, JJ; Ji, X; Jiang, L; Jo, JH; Johnson, RA; Joshi, J; Jwa, YJ; Karagiorgi, G; Ketchum, W; Kirby, B; Kirby, M; Kobilarcik, T; Kreslo, I | Abstract: We present results on the reconstruction of electromagnetic (EM) activity from photons produced in charged current νμ interactions with final state π0s. We employ a fully-automated reconstruction chain capable of identifying EM showers of (100) MeV energy, relying on a combination of traditional reconstruction techniques together with novel machine-learning approaches. These studies demonstrate good energy resolution, and good agreement between data and simulation, relying on the reconstructed invariant π0 mass and other photon distributions for validation. The reconstruction techniques developed are applied to a selection of νμ + Ar → μ + π0 + X candidate events to demonstrate the potential for calorimetric separation of photons from electrons and reconstruction of π0 kinematics.

Published
2020

11. Search for Heavy Neutral Leptons Decaying into Muon-Pion Pairs in the MicroBooNE Detector

Author

A. Mogan, T. Wongjirad, Michael H Kirby, Kazuhiro Terao, A. Paudel, E. Piasetzky, Sanchez, K. Mason, R. K. Neely, B. Russell, D. Cianci, M. Wospakrik, T. Kobilarcik, H. E. Rogers, S. Lockwitz, A. P. Furmanski, R. G. Van de Water, Vishvas Pandey, Afroditi Papadopoulou, W. Ketchum, J. C. Mills, J. A. Nowak, Janet Conrad, Yi Chen, Serhan Tufanli, L. Camilleri, T. Yang, V. Basque, Xiaolu Ji, A. M. Szelc, A. Mastbaum, B. R. Littlejohn, A. Bhanderi, M. Bishai, M. Ross-Lonergan, E.L. Snider, S. Sword-Fehlberg, L.S. Rochester, T. L. Usher, Panagiotis Spentzouris, A. Hourlier, G. Scanavini, Eliahu Cohen, J. Asaadi, Kate C. Miller, Steven Gardiner, S.R. Soleti, B. Viren, J. Zennamo, Laura Dominé, J. Moon, Thomas Strauss, D. Garcia-Gamez, Paul J. Green, S. F. Pate, S. Wolbers, R. Murrells, C.D. Moore, Veljko Radeka, K. P. Mistry, D. Lorca, L. Gu, O. Palamara, Z. Pavlovic, B. Baller, J. Mousseau, D. Franco, A. Rafique, X. Luo, C. Rudolf von Rohr, P. Abratenko, M. E. Convery, S. Balasubramanian, D. Devitt, H. Y. Wei, E.-C. Huang, Chao Zhang, C. James, V. Papavassiliou, M. Mooney, G. A. Horton-Smith, Or Hen, D.W. Schmitz, R. Castillo Fernandez, B. Lundberg, M. Del Tutto, P. Nienaber, Y. T. Tsai, Yang Li, B. Eberly, M. Alrashed, M. A. Uchida, R. A. Johnson, J. R. Sinclair, Z. Williams, A. Marchionni, D. A. Wickremasinghe, M. Luethi, William Tang, T. Mettler, John Marshall, S. Gollapinni, G. Yarbrough, Rod Thornton, R. LaZur, M. Weber, L. Cooper-Troendle, S. Dytman, Alison Lister, N. McConkey, W. Van De Pontseele, V. Genty, L. Escudero, J. Anthony, M. H. Shaevitz, I. Caro Terrazas, Antonio Ereditato, Craig L. Hill, P. M. Hamilton, D. Porzio, D. Naples, W. C. Louis, J. Joshi, I. Lepetic, Cris W. Barnes, W. G. Seligman, E. Church, N. Tagg, J. H. Jo, J. Spitz, G.D. Barr, J. St. John, D. Caratelli, G. Karagiorgi, D. Goeldi, D. A. Martinez Caicedo, N. Foppiani, C. Mariani, B.T. Fleming, W. Q. Gu, R. S. Fitzpatrick, H. Greenlee, L. Ren, K. Sutton, B. Kirby, J. Martin-Albo, T. Bolton, S. Berkman, J. Jan de Vries, G. P. Zeller, I. Kreslo, M. Toups, Andrew Blake, L. Jiang, S. Marcocci, R. An, Adi Ashkenazi, P. Guzowski, R. Itay, S. Söldner-Rembold, Sebastien Prince, M. Soderberg, J. L. Raaf, R. Sharankova, A. Schukraft, R. Guenette, F. Cavanna, Wei Wu, L.E. Yates, Giuseppe Benedetto Cerati, J. I. Crespo-Anadón, V. Meddage, O. Goodwin, A. Bhat, A. M. Smith, V. Paolone, Y.-J. Jwa, K. Woodruff, John Evans, K. E. Duffy, Xin Qian, T. A. Mohayai, G. Pulliam, E. Gramellini, M. Stancari, and Massachusetts Institute of Technology. Department of Physics

Subjects
Physics, Particle physics, Physics - Instrumentation and Detectors, Muon, 010308 nuclear & particles physics, 530 Physics, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Neutrino beam, 530 Physik, 01 natural sciences, High Energy Physics - Experiment, Standard Model, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, High Energy Physics::Experiment, Fermilab, Neutrino, 010306 general physics, Lepton
Abstract

This document was prepared by the MicroBooNE Collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. MicroBooNE is supported by the following: the U.S. Department of Energy, Office of Science, Offices of High Energy Physics and Nuclear Physics; the U.S. National Science Foundation; the Swiss National Science Foundation; the Science and Technology Facilities Council (STFC), part of the United Kingdom Research and Innovation; and The Royal Society (United Kingdom). Additional support for the laser calibration system and cosmic ray tagger was provided by the Albert Einstein Center for Fundamental Physics, Bern, Switzerland., We present upper limits on the production of heavy neutral leptons (HNLs) decaying to μπ pairs using data collected with the MicroBooNE liquid-argon time projection chamber (TPC) operating at Fermilab. This search is the first of its kind performed in a liquid-argon TPC. We use data collected in 2017 and 2018 corresponding to an exposure of 2.0×1020 protons on target from the Fermilab Booster Neutrino Beam, which produces mainly muon neutrinos with an average energy of ≈800 MeV. HNLs with higher mass are expected to have a longer time of flight to the liquid-argon TPC than Standard Model neutrinos. The data are therefore recorded with a dedicated trigger configured to detect HNL decays that occur after the neutrino spill reaches the detector. We set upper limits at the 90% confidence level on the element |Uμ4|2 of the extended PMNS mixing matrix in the range |Uμ4|2, Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359

Published
2020
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12. First Measurement of Inclusive Muon Neutrino Charged Current Differential Cross Sections on Argon at Eν∼0.8 GeV with the MicroBooNE Detector

Author

Colin Hill, A. Bhat, D. Lorca, H. Jostlein, R. Murrells, M. Bass, E. Church, N. Tagg, A. Mogan, J. Jan de Vries, L. Cooper-Troendle, V. Meddage, O. Goodwin, C. Rudolf von Rohr, X. Luo, D. A. Martinez Caicedo, Xiaohui Qian, G.D. Barr, H. Y. Wei, L. Escudero Sanchez, S. Gollapinni, A. Mastbaum, A. Hourlier, Avi Ashkenazi, R. G. Van de Water, Vishvas Pandey, D. Caratelli, Chao Zhang, G. P. Zeller, L. Domine, J. A. Nowak, Andrew Blake, L.E. Yates, S. Marcocci, B. R. Littlejohn, T. Mettler, John Marshall, V. Genty, C. Barnes, A. Rafique, J. Zennamo, M. Ross-Lonergan, C. Adams, G. Karagiorgi, M. E. Convery, T. Kobilarcik, Giuseppe Benedetto Cerati, J. Sinclair, J. I. Crespo-Anadón, G. Scanavini, K. Bhattacharya, R. Castillo Fernandez, P. Nienaber, E.-C. Huang, F. Bay, H.E. Rogers, W. Van De Pontseele, Ornella Palamara, R. A. Johnson, G. Yarbrough, D. Porzio, V. Paolone, D. Cianci, D. W. Schmitz, K. Woodruff, Yichen Li, S. Balasubramanian, M. Del Tutto, B. Eberly, Alejandro Diaz, Janet Conrad, Martin Auger, G. Pulliam, R. Guenette, J. Esquivel, A. Marchionni, William Tang, M. H. Shaevitz, I. Caro Terrazas, D. Franco, Panagiotis Spentzouris, S. Söldner-Rembold, J. Anthony, M. Toups, D.A. Wickremasinghe, J. Asaadi, J. Joshi, I. Lepetic, K. Mason, J. Mills, Eliahu Cohen, J. Moon, M. Bishai, Antonio Ereditato, J. Spitz, L. Rochester, J. J. Evans, F. Cavanna, R. An, T. Usher, B. Baller, S. Tufanli, D. Devitt, J. Martín-Albo, B.T. Fleming, T. Wongjirad, E.L. Snider, S. A. Dytman, D. Garcia-Gamez, W. Ketchum, Yi Chen, Wei Wu, M. A. Thomson, R. Carr, K. E. Duffy, A. Hackenburg, C. D. Moore, R. T. Thornton, S. F. Pate, P. Guzowski, D. Naples, Kazuhiro Terao, E. Piasetzky, R. S. Fitzpatrick, C. Mariani, W. Gu, K. Wierman, S.R. Soleti, B. Viren, J. Mousseau, H. Greenlee, K. Sutton, Michael T. Murphy, B. Kirby, C. James, M. Kirby, S. Wolbers, E. Gramellini, V. Papavassiliou, M. Mooney, M. Stancari, T. A. Bolton, Y.-T. Tsai, L. Camilleri, P. M. Hamilton, G. H. Collin, T. Yang, P. Abratenko, L. Ren, J. L. Raaf, Marc Weber, S. Lockwitz, Lei Jiang, B. Lundberg, G. A. Horton-Smith, M. Luethi, M. Alrashed, J. St. John, K. Mistry, R. Sharankova, Z. Pavlovic, A. Schukraft, A. P. Furmanski, A. Lister, W. C. Louis, B. Russell, Afroditi Papadopoulou, Xiaolu Ji, Andrew Smith, A. M. Szelc, W. G. Seligman, L. Gu, I. Kreslo, S. Sword-Fehlberg, Thomas Strauss, D. Goeldi, M. Soderberg, Or Hen, Z. Williams, Y.-J. Jwa, and R. Grosso

Subjects
Physics, Quasielastic scattering, Muon, Time projection chamber, Physics::Instrumentation and Detectors, General Physics and Astronomy, 01 natural sciences, Nuclear physics, Cross section (physics), 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, Muon neutrino, Fermilab, Neutrino, 010306 general physics, Charged current
Abstract

We report the first measurement of the double-differential and total muon neutrino charged current inclusive cross sections on argon at a mean neutrino energy of 0.8 GeV. Data were collected using the MicroBooNE liquid argon time projection chamber located in the Fermilab Booster neutrino beam and correspond to 1.6×10^{20} protons on target of exposure. The measured differential cross sections are presented as a function of muon momentum, using multiple Coulomb scattering as a momentum measurement technique, and the muon angle with respect to the beam direction. We compare the measured cross sections to multiple neutrino event generators and find better agreement with those containing more complete treatment of quasielastic scattering processes at low Q^{2}. The total flux integrated cross section is measured to be 0.693±0.010(stat)±0.165(syst)×10^{-38} cm^{2}.

Published
2019

13. Rejecting cosmic background for exclusive charged current quasi elastic neutrino interaction studies with Liquid Argon TPCs; a case study with the MicroBooNE detector

Author

G. Karagiorgi, P. Nienaber, K. Woodruff, C. Barnes, A. Rafique, William Tang, M. Toups, D. Devitt, R. An, R. Castillo Fernandez, P. M. Hamilton, M. E. Convery, Ornella Palamara, R. A. Johnson, G. Scanavini, J. Martín-Albo, E.L. Snider, M. A. Thomson, Xiaolu Ji, Kazuhiro Terao, G. H. Collin, D. Lorca, J. Jan de Vries, E. Piasetzky, A.A. Fadeeva, B.T. Fleming, J. Joshi, D. Naples, A. M. Szelc, S. Sword-Fehlberg, D. Cianci, S. Wolbers, K. Mistry, Andrew Blake, R. S. Fitzpatrick, J. Hewes, R. Murrells, W. C. Louis, Thomas Strauss, L. Jiang, C. Mariani, G. A. Horton-Smith, Michael H Kirby, C. Rudolf von Rohr, H. Y. Wei, L. Escudero Sanchez, G. Yarbrough, C.D. Moore, T. Usher, Andrew Smith, H. Greenlee, M. Alrashed, K. Sutton, V. Paolone, A. Mastbaum, A. P. Furmanski, B. Kirby, B. Baller, I. Kreslo, R. G. Van de Water, Giuseppe Benedetto Cerati, J. Zennamo, S. Marcocci, T. Bolton, C. Adams, Vishvas Pandey, L. Ren, B. Eberly, W. G. Seligman, S. Balasubramanian, A. Lister, L. Cooper-Troendle, T. Wongjirad, K. Bhattacharya, L. Camilleri, J. A. Nowak, W. Van De Pontseele, B. Lundberg, B. R. Littlejohn, M. Ross-Lonergan, J. Anthony, D. Goeldi, Yang Li, S. Dytman, G. P. Zeller, T. Mettler, John Marshall, T. Yang, J. Esquivel, M. Luethi, I. Lepetic, J. St. John, Janet Conrad, Martin Auger, L.E. Yates, D.A. Wickremasinghe, Panagiotis Spentzouris, Avi Ashkenazi, R. T. Thornton, Eliahu Cohen, M. Soderberg, F. Bay, J. Asaadi, J. Spitz, Marc Weber, Or Hen, J. Moon, L. Rochester, V. Genty, J. Sinclair, Z. Williams, D. Porzio, J. I. Crespo-Anadón, K. Wierman, S. Tufanli, D. W. Schmitz, Alejandro Diaz, B. Russell, S. Söldner-Rembold, M. H. Shaevitz, I. Caro Terrazas, Chao Zhang, H. Jostlein, T. Kobilarcik, Y.-J. Jwa, X. Luo, Z. Pavlovic, A. Hourlier, J. L. Raaf, S. Lockwitz, D. Garcia-Gamez, R. Grosso, V. Meddage, A. Bhat, O. Goodwin, S. F. Pate, R. Guenette, D. A. Martinez Caicedo, S. Gollapinni, F. Cavanna, J. J. Evans, R. Sharankova, A. Schukraft, Yi Chen, E.-C. Huang, S.R. Soleti, B. Viren, J. Mousseau, A. Marchionni, Afroditi Papadopoulou, W. Ketchum, M. Del Tutto, K. E. Duffy, Xin Qian, R. Carr, Antonio Ereditato, Craig L. Hill, M. Bishai, Michael T. Murphy, M. Bass, E. Church, N. Tagg, G.D. Barr, E. Gramellini, D. Caratelli, A. Hackenburg, Y.-T. Tsai, P. Guzowski, G. Pulliam, D. Franco, A. Mogan, C. James, V. Papavassiliou, and M. Mooney

Subjects
Physics, Muon, Physics and Astronomy (miscellaneous), 530 Physics, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Detector, Cosmic background radiation, lcsh:Astrophysics, Cosmic ray, 01 natural sciences, Nuclear physics, lcsh:QB460-466, 0103 physical sciences, lcsh:QC770-798, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, High Energy Physics::Experiment, Neutrino, 010306 general physics, Neutrino oscillation, Engineering (miscellaneous), Event (particle physics), Charged current
Abstract

Cosmic ray (CR) interactions can be a challenging source of background for neutrino oscillation and cross-section measurements in surface detectors. We present methods for CR rejection in measurements of charged-current quasielastic-like (CCQE-like) neutrino interactions, with a muon and a proton in the final state, measured using liquid argon time projection chambers (LArTPCs). Using a sample of cosmic data collected with the MicroBooNE detector, mixed with simulated neutrino scattering events, a set of event selection criteria is developed that produces an event sample with minimal contribution from CR background. Depending on the selection criteria used a purity between 50 and 80% can be achieved with a signal selection efficiency between 50 and 25%, with higher purity coming at the expense of lower efficiency. While using a specific dataset and selection criteria values optimized for the MicroBooNE detector, the concepts presented here are generic and can be adapted for various studies of exclusive $$\nu _{\mu }$$ ν μ CCQE interactions in LArTPCs.

Published
2019

14. First measurement of νμ charged-current π0 production on argon with the MicroBooNE detector

Author

H. Jostlein, S. Wolbers, E. Gramellini, M. Bishai, V. Paolone, V. Meddage, L.E. Yates, O. Goodwin, J. Spitz, J. St. John, R. Carr, A.A. Fadeeva, B. Russell, C. Mariani, E.L. Snider, J. I. Crespo-Anadón, C. Rudolf von Rohr, Xiaohui Qian, H. Y. Wei, L. Escudero Sanchez, E. Church, R. Murrells, C. W. James, K. E. Duffy, D.W. Schmitz, A. Rafique, H. Greenlee, J. L. Raaf, J. Esquivel, L.S. Rochester, J. R. Sinclair, A. Bhat, T. L. Usher, Panagiotis Spentzouris, A. Mastbaum, D. A. Wickremasinghe, K. Sutton, C. S. Hill, B. Kirby, S. Lockwitz, T. Mettler, John Marshall, M. A. Thomson, K. P. Mistry, Xiaolu Ji, C. Adams, Alison Lister, G. P. Zeller, A. M. Szelc, D. Garcia-Gamez, Michael T. Murphy, Afroditi Papadopoulou, M. Weber, T. Kobilarcik, A. Marchionni, Serhan Tufanli, A. P. Furmanski, L. Cooper-Troendle, R. Sharankova, J. Moon, R. Castillo Fernandez, S. Sword-Fehlberg, R. Grosso, W. Van De Pontseele, S. F. Pate, Giuseppe Benedetto Cerati, R. A. Johnson, A. M. Smith, T. Wongjirad, S.R. Soleti, P. Nienaber, G. Karagiorgi, S. A. Dytman, Thomas Strauss, D. Cianci, D. Porzio, J. Joshi, K. Bhattacharya, D. Lorca, R. Guenette, E.-C. Huang, A. Schukraft, Adi Ashkenazi, B. Viren, J. Mousseau, Alejandro Diaz, P. Guzowski, B. Eberly, Chao Zhang, S. Söldner-Rembold, G. Pulliam, William Tang, F. Cavanna, L. Jiang, J. Anthony, Kazuhiro Terao, Eliahu Cohen, Y.-J. Jwa, V. Genty, S. Gollapinni, M. Del Tutto, V. Papavassiliou, E. Piasetzky, I. Lepetic, M. Ross-Lonergan, K. Wierman, B. R. Littlejohn, J. Hewes, S. Balasubramanian, K. Woodruff, M. H. Shaevitz, I. Caro Terrazas, John Evans, B. Lundberg, G. Scanavini, Antonio Ereditato, B. Baller, P. M. Hamilton, D. Naples, Jan Conrad, J. Asaadi, M. Bass, N. Tagg, G.D. Barr, D. Caratelli, A. Hackenburg, M. Soderberg, R. G. Van de Water, Vishvas Pandey, Y. T. Tsai, Yang Li, O. Palamara, J. A. Nowak, Yi Chen, J. Jan de Vries, M. Luethi, M. E. Convery, W. C. Louis, M. Toups, A. Mogan, Margaret M. Mooney, F. Bay, Andrew Blake, J. Zennamo, T. A. Bolton, D. Franco, H. S. Chen, X. Luo, R. An, W. Ketchum, B.T. Fleming, R. S. Fitzpatrick, L. Ren, W. G. Seligman, D. Goeldi, T. Yang, G. H. Collin, A. Hourlier, Z. Pavlovic, G. A. Horton-Smith, D. Devitt, M. Alrashed, C. D. Moore, Martin Auger, R. T. Thornton, D. A. Martinez Caicedo, G. Yarbrough, L. Camilleri, Cris W. Barnes, J. Martin-Albo, I. Kreslo, S. Marcocci, Or Hen, Z. Williams, and M. H. Kirby

Subjects
Physics, Time projection chamber, Argon, chemistry, 010308 nuclear & particles physics, 0103 physical sciences, Liquid argon, chemistry.chemical_element, Neutrino beam, 010306 general physics, 01 natural sciences, Charged current, Mathematical physics
Abstract

Author(s): Adams, C; Alrashed, M; An, R; Anthony, J; Asaadi, J; Ashkenazi, A; Auger, M; Balasubramanian, S; Baller, B; Barnes, C; Barr, G; Bass, M; Bay, F; Bhat, A; Bhattacharya, K; Bishai, M; Blake, A; Bolton, T; Camilleri, L; Caratelli, D; Caro Terrazas, I; Carr, R; Castillo Fernandez, R; Cavanna, F; Cerati, G; Chen, H; Chen, Y; Church, E; Cianci, D; Cohen, E; Collin, GH; Conrad, JM; Convery, M; Cooper-Troendle, L; Crespo-Anadon, JI; Del Tutto, M; Devitt, D; Diaz, A; Duffy, K; Dytman, S; Eberly, B; Ereditato, A; Escudero Sanchez, L; Esquivel, J; Evans, JJ; Fadeeva, AA; Fitzpatrick, RS; Fleming, BT; Franco, D; Furmanski, AP; Garcia-Gamez, D; Genty, V; Goeldi, D; Gollapinni, S; Goodwin, O; Gramellini, E; Greenlee, H; Grosso, R; Guenette, R; Guzowski, P; Hackenburg, A; Hamilton, P; Hen, O; Hewes, J; Hill, C; Horton-Smith, GA; Hourlier, A; Huang, EC; James, C; Jan De Vries, J; Ji, X; Jiang, L; Johnson, RA; Joshi, J; Jostlein, H; Jwa, YJ; Karagiorgi, G; Ketchum, W; Kirby, B; Kirby, M; Kobilarcik, T; Kreslo, I; Lepetic, I; Li, Y; Lister, A | Abstract: We report the first measurement of the flux-integrated cross section of νμ charged-current single π0 production on argon. This measurement is performed with the MicroBooNE detector, an 85 ton active mass liquid argon time projection chamber exposed to the Booster Neutrino Beam at Fermilab. This result on argon is compared to past measurements on lighter nuclei to investigate the scaling assumptions used in models of the production and transport of pions in neutrino-nucleus scattering. The techniques used are an important demonstration of the successful reconstruction and analysis of neutrino interactions producing electromagnetic final states using a liquid argon time projection chamber operating at the Earth's surface.

Published
2019

15. G355(P) Healthy london partnership’s child death overview panel (cdop) transformation programme: maximising learning from child death reviews across london

Author

T Parr, Ronny Cheung, D Devitt, and D O’Sullivan

Subjects
Child mortality, Medical education, Social work, business.industry, Statutory law, Standard of Good Practice, General partnership, Stakeholder, Medicine, Stakeholder engagement, business, Suicide prevention
Abstract

A three-year programme began in 2016 to support the London Child Death Overview Panel (CDOP) system to meet the significant transformational challenges they face. The London CDOP system accounts for 28 of 90 CDOPs in England. The publication of the National review of statutory guidance on Child Death Reviews (as part of the Children and Social Work Act (CSWA) gave an added impetus to transform the way in which these 28 CDOPs worked together to review deaths of children across the city. A baseline system survey revealed widespread variation in processes, resources and outcomes for the child death review process. Flowing from the survey and stakeholder engagement events, we supported the London CDOPs to align their practice via a series of workshops, generation of resources to enable London to respond to requirements of CSWA and new Statutory guidance. Year 1 outputs have included: Themed workshops addressing stakeholder priorities including Asthma and Neonatal Deaths, consanguinity, SUDI, Suicide Prevention and working relationships with Coroners Development of Pan London resources including review checklists for the above conditions, and resources for CDOPs to tackle bereavement support and suicide prevention – to support the delivery of a minimum standard of practice Pan London system level relationships including Coronial, Ambulance and Pathology systems and creation of agreed child death pathways across all providers within a coronial jurisdiction. Year two was geared towards transitioning to the new statutory Child Death Review standards. We worked with CDOPs in terms of their changing role, and how to increase their footprint in order to set up new governance structures. We also worked increasingly with healthcare providers to prepare them for their new role delivering the Child Death Review Meeting. We also obtained pump priming funding to deliver an electronic case management tool (eCDOPs) across all London CDOPs, as an enabler to align processes, release efficiencies to facilitate transition to the new system. Year three will continue to deliver system transformation support, but will also focus on the creation of an e-learning programme to support CDOP staff training across London, with a modular approach to allow tailoring of the course bespoke to learner needs, depending on their professional roles and requirements.

Published
2019

16. Comparison of $${\varvec{\nu }}_{\varvec{\mu }}-$$Ar multiplicity distributions observed by MicroBooNE to GENIE model predictions

Author

J. Spitz, D.A. Wickremasinghe, P. Guzowski, M. Del Tutto, D. A. Martinez Caicedo, D. Lorca, A. Hourlier, R. Guenette, G. H. Collin, B. R. Littlejohn, G. P. Zeller, C. Mariani, T. Mettler, John Marshall, D. Devitt, W. Ketchum, F. Bay, E.-C. Huang, F. Cavanna, Antonio Ereditato, B. Eberly, A.A. Fadeeva, H. Greenlee, G. Karagiorgi, P. Nienaber, L. Jiang, Y.-J. Jwa, K. Sutton, B. Kirby, K. Woodruff, C. D. Moore, A. Mogan, X. Luo, D. Garcia-Gamez, G. A. Horton-Smith, E. Church, R. Murrells, D. Porzio, S. F. Pate, J. Anthony, G. Yarbrough, S. Marcocci, R. An, A. M. Szelc, Andrew Smith, S. Tufanli, Alejandro Diaz, John Evans, S. Sword-Fehlberg, A. Marchionni, T. Wongjirad, J. Jan de Vries, K. Bhattacharya, S. Söldner-Rembold, G. T. Garvey, H. Jostlein, I. Kreslo, Thomas Strauss, V. Meddage, A. Bhat, M. E. Convery, J. Asaadi, S. Gollapinni, D. Cianci, Chao Zhang, Z. Pavlovic, L.E. Yates, W. G. Seligman, J. Ho, C. James, H. S. Chen, Yi Chen, G. Pulliam, A. P. Furmanski, J. Sinclair, V. Papavassiliou, Colin Hill, J. Joshi, M. Kirby, J. I. Crespo-Anadón, M. Mooney, M. Soderberg, Andrew Blake, G. B. Mills, W. Foreman, V. Paolone, D. Goeldi, J. L. Raaf, D. W. Schmitz, Eliahu Cohen, S. Wolbers, J. Zennamo, M. Ross-Lonergan, M. Luethi, J. Hewes, Michael T. Murphy, B. Russell, T. Yang, D. Kaleko, Janet Conrad, Martin Auger, Afroditi Papadopoulou, C. Rudolf von Rohr, K. Wierman, Or Hen, R. Grosso, M. Bass, N. Tagg, Xiaohui Qian, H. Y. Wei, L. Escudero Sanchez, B. Lundberg, G.D. Barr, B. Baller, A. Mastbaum, Z. Williams, D. Caratelli, A. Hackenburg, E. Gramellini, B. T. Fleming, A. Schukraft, S. Lockwitz, J. St. John, C. Barnes, C. Adams, A. Rafique, S.R. Soleti, L. Cooper-Troendle, V. Genty, B. Viren, J. Mousseau, W. Van De Pontseele, T. A. Bolton, Y. T. Tsai, L. Camilleri, S. Balasubramanian, A. Lister, R. Castillo Fernandez, M. H. Shaevitz, Ornella Palamara, R. A. Johnson, P. M. Hamilton, Giuseppe Benedetto Cerati, J. Esquivel, W. C. Louis, L.S. Rochester, T. L. Usher, Panagiotis Spentzouris, J. Moon, S. A. Dytman, T. Miceli, R. G. Van de Water, Vishvas Pandey, J. A. Nowak, M. A. Thomson, D. Naples, Kazuhiro Terao, E. Piasetzky, M. Bishai, Marc Weber, E.L. Snider, T. Kobilarcik, Yichen Li, William Tang, and M. Toups

Subjects
Physics, Time projection chamber, Muon, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, 01 natural sciences, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Muon neutrino, Fermilab, Neutrino, 010306 general physics, Engineering (miscellaneous), Charged current, Lepton, Event generator
Abstract

We measure a large set of observables in inclusive charged current muon neutrino scattering on argon with the MicroBooNE liquid argon time projection chamber operating at Fermilab. We evaluate three neutrino interaction models based on the widely used GENIE event generator using these observables. The measurement uses a data set consisting of neutrino interactions with a final state muon candidate fully contained within the MicroBooNE detector. These data were collected in 2016 with the Fermilab Booster Neutrino Beam, which has an average neutrino energy of $$800~\hbox {MeV}$$ 800 MeV , using an exposure corresponding to $$ 5.0\times 10^{19}$$ 5.0 × 10 19 protons-on-target. The analysis employs fully automatic event selection and charged particle track reconstruction and uses a data-driven technique to separate neutrino interactions from cosmic ray background events. We find that GENIE models consistently describe the shapes of a large number of kinematic distributions for fixed observed multiplicity.

Published
2019

17. The continuous readout stream of the MicroBooNE liquid argon time projection chamber for detection of supernova burst neutrinos

Author

B.T. Fleming, W. Q. Gu, R. S. Fitzpatrick, Chao Zhang, R. Dorrill, N. McConkey, A. Marchionni, K. Mason, J. Mills, Giuseppe Benedetto Cerati, Andrew Smith, K. E. Duffy, O. Benevides Rodrigues, Xin Qian, S. Tufanli, L. Rochester, D. Devitt, I. Kreslo, Y.-J. Jwa, S. Berkman, C. Barnes, A. Rafique, A. Navrer-Agasson, M. Kirby, T. A. Mohayai, P. M. Hamilton, R. Castillo Fernandez, Ornella Palamara, R. A. Johnson, D. Cianci, Panagiotis Spentzouris, L. Ren, J. Rodriguez Rondon, Yi Chen, L. Bathe-Peters, L.E. Yates, B. Eberly, N. Foppiani, C. Mariani, S. F. Pate, K. Mistry, E. D. Hall, J. Moon, John Evans, W. C. Louis, H. Greenlee, J. Sinclair, J. Jan de Vries, J. I. Crespo-Anadón, J. Anthony, Michael T. Murphy, W. Ketchum, T. Usher, B. Baller, Steven Gardiner, I. Lepetic, Veljko Radeka, R. Sharankova, G. Karagiorgi, P. Nienaber, M. Soderberg, I. Ponce-Pinto, K. Sutton, B. Kirby, B. Viren, C. D. Moore, A. F. Moor, J. St. John, A. Schukraft, D. W. Schmitz, V. Paolone, D. Lorca, R. Guenette, K. Li, S. A. Dytman, M. Wospakrik, J. Mousseau, G. Scanavini, V. Meddage, O. Goodwin, C. James, E. Gramellini, V. Papavassiliou, M. Ross-Lonergan, M. Mooney, Avi Ashkenazi, G. P. Zeller, M. Reggiani-Guzzo, M. Stancari, J. L. Raaf, Or Hen, R. G. Van de Water, Andrew Blake, C. Thorpe, Y.-T. Tsai, T. Mettler, John Marshall, P. Abratenko, M. Rosenberg, R. Diurba, N. Tagg, J. H. Jo, Z. Williams, G.D. Barr, M. H. Shaevitz, I. Caro Terrazas, A. P. Furmanski, Patrick Green, L. Jiang, D. Caratelli, A.A. Fadeeva, D. Porzio, F. Cavanna, A. Mastbaum, E.-C. Huang, J. A. Nowak, E. Church, A. Bhat, T. A. Bolton, D. Franco, L. Camilleri, S. Söldner-Rembold, Janet Conrad, Wei Wu, M. Del Tutto, Xiaolu Ji, X. Luo, Z. Pavlovic, L. Cooper-Troendle, A. M. Szelc, A. Bhanderi, Antonio Ereditato, S. Sword-Fehlberg, Marc Weber, D. Garcia-Gamez, R. T. Thornton, Thomas Strauss, B. R. Littlejohn, H. E. Rogers, D. Naples, Kazuhiro Terao, D. A. Martinez Caicedo, A. Paudel, E. Piasetzky, J. Asaadi, Kate C. Miller, T. Yang, V. Basque, S. Prince, G. A. Horton-Smith, M. Alrashed, G. Yarbrough, R. An, P. Guzowski, R. Itay, N. Kamp, D. Marsden, M. A. Uchida, Yichen Li, William Tang, S. Marcocci, M. Toups, S. Balasubramanian, M. Bishai, Eliahu Cohen, J. Martín-Albo, E.L. Snider, M. E. Convery, T. Kobilarcik, A. Hourlier, T. Wongjirad, R. LaZur, J. Spitz, S. Gollapinni, A. Mogan, R. K. Neely, L. Gu, B. Russell, Afroditi Papadopoulou, H. Y. Wei, L. Escudero Sanchez, L. Domine, J. Zennamo, W. Van De Pontseele, G. A. Fiorentini Aguirre, and S. Wolbers

Subjects
Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, 030218 nuclear medicine & medical imaging, High Energy Physics - Experiment (hep-ex), 03 medical and health sciences, 0302 clinical medicine, Optics, 0103 physical sciences, Instrumentation, Mathematical Physics, Physics, Lossless compression, Time projection chamber, 010308 nuclear & particles physics, Supernova Early Warning System, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), Supernova, Neutrino, business, Zero suppression, Data reduction
Abstract

The MicroBooNE continuous readout stream is a parallel readout of the MicroBooNE liquid argon time projection chamber (LArTPC) which enables detection of non-beam events such as those from a supernova neutrino burst. The low energies of the supernova neutrinos and the intense cosmic-ray background flux due to the near-surface detector location makes triggering on these events very challenging. Instead, MicroBooNE relies on a delayed trigger generated by SNEWS (the Supernova Early Warning System) for detecting supernova neutrinos. The continuous readout of the LArTPC generates large data volumes, and requires the use of real-time compression algorithms (zero suppression and Huffman compression) implemented in an FPGA (field-programmable gate array) in the readout electronics. We present the results of the optimization of the data reduction algorithms, and their operational performance. To demonstrate the capability of the continuous stream to detect low-energy electrons, a sample of Michel electrons from stopping cosmic-ray muons is reconstructed and compared to a similar sample from the lossless triggered readout stream., Comment: 30 pages, 21 figures

Published
2021

18. Ionization electron signal processing in single phase LArTPCs: Part II: Data/simulation comparison and performance in MicroBooNE

Author

J. Joshi, B. Russell, J. Hewes, S. Marcocci, M. Bass, E. Church, N. Tagg, D.A. Wickremasinghe, B. Baller, J. L. Raaf, K. Bhattacharya, G.D. Barr, M. Dolce, D. Kaleko, D. Caratelli, G. Karagiorgi, P. Nienaber, K. Woodruff, G. Pulliam, Y.-T. Tsai, J. J. Evans, S. Lockwitz, A. Hackenburg, C. Barnes, A. Rafique, M. Ross-Lonergan, G. P. Zeller, T. Mettler, John Marshall, G. B. Mills, Andrew Smith, G. Yarbrough, I. Kreslo, Yi Chen, T. Usher, M. Del Tutto, D. Porzio, D. Devitt, Afroditi Papadopoulou, W. Ketchum, Michael T. Murphy, A. Bhat, B. R. Littlejohn, H. S. Chen, S. Tufanli, Alejandro Diaz, S. Söldner-Rembold, T. Wongjirad, Antonio Ereditato, E. Gramellini, R. An, R. Castillo Fernandez, R. Carr, M. Bishai, A.A. Fadeeva, C.D. Moore, F. Bay, D. A. Martinez Caicedo, J. Jan de Vries, Ornella Palamara, R. A. Johnson, Veljko Radeka, J. Asaadi, L. Camilleri, C. Rudolf von Rohr, R. Murrells, S. Balasubramanian, A. Lister, D. Garcia-Gamez, H. Y. Wei, L. Escudero Sanchez, Andrew Blake, L. Jiang, A. Mastbaum, D. Lorca, D. Cianci, X. Luo, Yang Li, E.-C. Huang, Xin Qian, S. F. Pate, A. Mogan, W. Foreman, V. Paolone, M. Luethi, L. Rochester, Marc Weber, C. Mariani, S.R. Soleti, B. Viren, C. Adams, J. Mousseau, M. Soderberg, A. Marchionni, K. Wierman, P. Guzowski, L. Cooper-Troendle, H. Greenlee, T. Yang, V. Meddage, W. Van De Pontseele, B.T. Fleming, Or Hen, C. James, Z. Williams, V. Papavassiliou, A. Schukraft, M. Mooney, K. Sutton, B. Kirby, A. P. Furmanski, A. Hourlier, T. Bolton, Y.-J. Jwa, Bo Yu, Z. Pavlovic, S. Wolbers, B. Lundberg, J. St. John, A. M. Szelc, S. Sword-Fehlberg, Thomas Strauss, E. Cohen, Colin Hill, P. M. Hamilton, B. Eberly, J. Anthony, D. Naples, E.L. Snider, W. C. Louis, S. Dytman, M. Toups, V. Genty, Michael H Kirby, M. H. Shaevitz, I. Caro Terrazas, Giuseppe Benedetto Cerati, M. E. Convery, T. Kobilarcik, C. Zhang, R. Grosso, W. G. Seligman, D. Goeldi, J. Zennamo, G. H. Collin, G. A. Horton-Smith, L.E. Yates, J. Ho, J. Sinclair, J. I. Crespo-Anadón, J. Esquivel, Janet Conrad, Panagiotis Spentzouris, D. W. Schmitz, Martin Auger, J. Moon, T. Miceli, R. G. Van de Water, Vishvas Pandey, W. Tang, J. A. Nowak, G. T. Garvey, H. Jostlein, R. Guenette, S. Gollapinni, M. A. Thomson, Kazuhiro Terao, F. Cavanna, E. Piasetzky, J. Spitz, and Massachusetts Institute of Technology. Department of Physics

Subjects
Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, Cryogenics, Electron, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Optics, Ionization, 0103 physical sciences, Calibration, Data processing Methods, Neutrino detectors, Performance of High Energy Physics Detectors, Time projection Chambers (TPC), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Instrumentation, Mathematical Physics, Physics, Signal processing, Time projection chamber, 010308 nuclear & particles physics, Noise (signal processing), business.industry, Detector, Instrumentation and Detectors (physics.ins-det), business
Abstract

The single-phase liquid argon time projection chamber (LArTPC) provides a large amount of detailed information in the form of fine-grained drifted ionization charge from particle traces. To fully utilize this information, the deposited charge must be accurately extracted from the raw digitized waveforms via a robust signal processing chain. Enabled by the ultra-low noise levels associated with cryogenic electronics in the MicroBooNE detector, the precise extraction of ionization charge from the induction wire planes in a single-phase LArTPC is qualitatively demonstrated on MicroBooNE data with event display images, and quantitatively demonstrated via waveform-level and track-level metrics. Improved performance of induction plane calorimetry is demonstrated through the agreement of extracted ionization charge measurements across different wire planes for various event topologies. In addition to the comprehensive waveform-level comparison of data and simulation, a calibration of the cryogenic electronics response is presented and solutions to various MicroBooNE-specific TPC issues are discussed. This work presents an important improvement in LArTPC signal processing, the foundation of reconstruction and therefore physics analyses in MicroBooNE., Comment: 54 pages, 36 figures; the first part of this work can be found at arXiv:1802.08709

Published
2018

19. Ionization Electron Signal Processing in Single Phase LArTPCs I. Algorithm Description and Quantitative Evaluation with MicroBooNE Simulation

Author

W. Foreman, V. Paolone, A. Hourlier, T. Kobilarcik, Colin Hill, H. S. Chen, Bo Yu, C. Zhang, D.A. Wickremasinghe, L.E. Yates, J. Ho, L. Bagby, T. Miceli, A. P. Furmanski, S. Marcocci, T. Yang, K. Bhattacharya, R. Grosso, J. Sinclair, J. I. Crespo-Anadón, T. Wongjirad, M. Soderberg, R. G. Van de Water, C.D. Moore, J. Jan de Vries, Vishvas Pandey, Afroditi Papadopoulou, W. Ketchum, B.T. Fleming, D. W. Schmitz, S. Dytman, D. Cianci, A. Bhat, L. Camilleri, J. L. Raaf, D. Kaleko, Veljko Radeka, D. Devitt, W. Tang, E.-C. Huang, J. A. Nowak, Or Hen, G. B. Mills, M. Del Tutto, V. Genty, Z. Williams, R. Guenette, K. Wierman, A.A. Fadeeva, L. Rochester, Marc Weber, A. Marchionni, S. Balasubramanian, A. Lister, B. Eberly, Andrew Blake, L. Jiang, Antonio Ereditato, J. Esquivel, J. Anthony, R. Murrells, M. H. Shaevitz, F. Cavanna, Michael T. Murphy, M. Bishai, A. Diaz, Panagiotis Spentzouris, C. Barnes, P. M. Hamilton, E. Cohen, A. Rafique, F. Bay, J. Moon, C. Rudolf von Rohr, H. Y. Wei, Michael H Kirby, Y.-J. Jwa, G. Karagiorgi, P. Nienaber, L. Escudero Sanchez, A. Mastbaum, B. Lundberg, D. Naples, S.R. Soleti, B. Viren, K. Woodruff, R. Castillo Fernandez, A. M. Szelc, C. Mariani, T. Usher, D. Lorca, E. Gramellini, Ornella Palamara, R. A. Johnson, J. Mousseau, W. C. Louis, S. Sword-Fehlberg, Andrew Smith, Z. Pavlovic, H. Greenlee, Giuseppe Benedetto Cerati, K. Sutton, B. Kirby, C. Adams, M. Bass, E. Church, Y.-T. Tsai, I. Kreslo, P. Guzowski, Thomas Strauss, C. E. Thorn, V. Meddage, A. Schukraft, N. Tagg, D. A. Martinez Caicedo, G.D. Barr, L. Cooper-Troendle, T. Bolton, Yang Li, X. Luo, W. Van De Pontseele, M. Ross-Lonergan, D. Caratelli, J. St. John, M. Luethi, A. Hackenburg, M. A. Thomson, Kazuhiro Terao, E. Piasetzky, G. Yarbrough, G. Pulliam, J. J. Evans, S. Wolbers, Yi Chen, Xin Qian, R. An, G. H. Collin, G. A. Horton-Smith, B. R. Littlejohn, J. Asaadi, D. Garcia-Gamez, S. F. Pate, Janet Conrad, C. James, V. Papavassiliou, M. Mooney, Martin Auger, J. Spitz, B. Russell, S. Lockwitz, W. G. Seligman, M. E. Convery, G. T. Garvey, H. Jostlein, D. Goeldi, J. Zennamo, S. Gollapinni, M. Toups, E.L. Snider, G. P. Zeller, John Marshall, D. Porzio, S. Tufanli, S. Söldner-Rembold, J. Joshi, J. Hewes, A. Mogan, B. Baller, Massachusetts Institute of Technology. Department of Physics, Massachusetts Institute of Technology. Laboratory for Nuclear Science, Collin, G. H., Conrad, Janet Marie, Diaz, Alejandro, Hen, Or, Hourlier, Adrien C., Moon, Jarrett S., Papadopoulou, Afroditi, and Yates, Lauren Elizabeth

Subjects
Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Time projection chambers, FOS: Physical sciences, Electron, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Ionization, 0103 physical sciences, Waveform, Neutrino detectors, Nuclear Experiment (nucl-ex), 010306 general physics, Instrumentation, Nuclear Experiment, Mathematical Physics, Physics, Signal processing, Time projection chamber, Tomographic reconstruction, 010308 nuclear & particles physics, Detector, Instrumentation and Detectors (physics.ins-det), Data processing methods, Deconvolution, Algorithm
Abstract

We describe the concept and procedure of drifted-charge extraction developed in the MicroBooNE experiment, a single-phase liquid argon time projection chamber (LArTPC). This technique converts the raw digitized TPC waveform to the number of ionization electrons passing through a wire plane at a given time. A robust recovery of the number of ionization electrons from both induction and collection anode wire planes will augment the 3D reconstruction, and is particularly important for tomographic reconstruction algorithms. A number of building blocks of the overall procedure are described. The performance of the signal processing is quantitatively evaluated by comparing extracted charge with the true charge through a detailed TPC detector simulation taking into account position-dependent induced current inside a single wire region and across multiple wires. Some areas for further improvement of the performance of the charge extraction procedure are also discussed. Keywords: MicroBooNE, Signal Processing, Deconvolution, ROI, United States. Department of Energy. High Energy Physics Division, National Science Foundation (U.S.), Swiss National Science Foundation, Science and Technology Facilities Council (Great Britain), Royal Society (Great Britain)

Published
2018

20. The Pandora multi-algorithm approach to automated pattern recognition of cosmic-ray muon and neutrino events in the MicroBooNE detector

Author

D. Cianci, A. P. Furmanski, B. Russell, R. Acciarri, W. G. Seligman, B. Eberly, J. Anthony, J. L. Raaf, H. S. Chen, D. Goeldi, C. Adams, D. Kaleko, J. Zennamo, A. Hourlier, M. Auger, D. Garcia-Gamez, S. F. Pate, C. James, T. Kobilarcik, B. R. Littlejohn, V. Papavassiliou, G. H. Collin, M. Mooney, J. Joshi, D. A. Martinez Caicedo, J. Asaadi, C. Zhang, D. Lorca, W. Ketchum, R. Guenette, F. Bay, T. Miceli, T. Usher, R. G. Van de Water, Michael H Kirby, R. Grosso, G. A. Horton-Smith, B. Baller, L. Bagby, C. Barnes, A. Rafique, B. Lundberg, E. Gramellini, M. Bishai, E. Cohen, J. A. Nowak, F. Cavanna, G. T. Garvey, Z. Pavlovic, Y.-T. Tsai, E.-C. Huang, P. M. Hamilton, G. Karagiorgi, M. Luethi, P. Nienaber, Janet Conrad, J. Esquivel, Panagiotis Spentzouris, G. P. Zeller, T. Wongjirad, J. St. John, Xin Qian, R. Castillo Fernandez, K. Woodruff, X. Luo, John Marshall, A. M. Szelc, Ornella Palamara, R. A. Johnson, J. Moon, Colin Hill, A. Marchionni, D. Naples, J. Ho, G. B. Mills, A. Schukraft, E.L. Snider, W. C. Louis, H. Jöstlein, S. Gollapinni, D. Porzio, C. Mariani, H. Greenlee, C.-M. Jen, Luke A. Yates, Thomas Strauss, M. A. Thomson, J. Sinclair, J. I. Crespo-Anadón, R. An, J. Hewes, T. Yang, S. Tufanli, W. Foreman, V. Paolone, Kazuhiro Terao, B. Kirby, E. Piasetzky, B.T. Fleming, S. Dytman, T. Bolton, S. Söldner-Rembold, N. Graf, D. W. Schmitz, J. Jan de Vries, D. Devitt, M. Soderberg, B. Carls, V. Genty, Andrew Blake, L. Jiang, A. Laube, G. Pulliam, M. H. Shaevitz, L. Camilleri, M. Toups, J. Spitz, Or Hen, Marc Weber, M. E. Convery, Andrew Smith, I. Kreslo, S.R. Soleti, B. Viren, J. Mousseau, M. Del Tutto, C. Rudolf von Rohr, Antonio Ereditato, L. Escudero Sanchez, M. Bass, E. Church, N. Tagg, G.D. Barr, D. Caratelli, A. Hackenburg, Yang Li, W. Van De Pontseele, C.D. Moore, S. Lockwitz, S. Balasubramanian, A. Lister, S. Wolbers, V. Meddage, D.A. Wickremasinghe, L. Rochester, A.A. Fadeeva, R. Murrells, Collin, G. H., Conrad, Janet Marie, Hen, Or, Hourlier, Adrien C., Moon, J., Wongjirad, Taritree, and Yates, Lauren Elizabeth

Subjects
Physics and Astronomy (miscellaneous), Exploit, Regular Article - Experimental Physics, lcsh:Astrophysics, computer.software_genre, Network topology, 01 natural sciences, Task (project management), lcsh:QB460-466, 0103 physical sciences, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Detectors and Experimental Techniques, 010306 general physics, Engineering (miscellaneous), QC, Physics, 010308 nuclear & particles physics, business.industry, Event (computing), Detector, Software development, Pattern recognition, Advanced software [3], Pattern recognition (psychology), lcsh:QC770-798, Data mining, Artificial intelligence, Neutrino, business, computer, Algorithm
Abstract

The development and operation of liquid-argon time-projection chambers for neutrino physics has created a need for new approaches to pattern recognition in order to fully exploit the imaging capabilities offered by this technology. Whereas the human brain can excel at identifying features in the recorded events, it is a significant challenge to develop an automated, algorithmic solution. The Pandora Software Development Kit provides functionality to aid the design and implementation of pattern-recognition algorithms. It promotes the use of a multi-algorithm approach to pattern recognition, in which individual algorithms each address a specific task in a particular topology. Many tens of algorithms then carefully build up a picture of the event and, together, provide a robust automated pattern-recognition solution. This paper describes details of the chain of over one hundred Pandora algorithms and tools used to reconstruct cosmic-ray muon and neutrino events in the MicroBooNE detector. Metrics that assess the current pattern-recognition performance are presented for simulated MicroBooNE events, using a selection of final-state event topologies.

Published
2018

21. SUSTAINABLE WATER USE IN URBAN LANDSCAPES IN THE 21ST CENTURY: A LAS VEGAS PERSPECTIVE

Author

D. Devitt and R. Morris

Subjects
Water resources, Water conservation, business.industry, Sustainability, Farm water, Environmental science, Water supply, Water quality, Horticulture, business, Environmental planning, Water use, Water scarcity
Abstract

Water conservation in the urban landscape can and should occur in every region of the United States. However, in communities located in arid regions of the southwestern United States, a higher percentage of the water is used outdoors. In Las Vegas, the residential sector uses approximately 60% of all the water, with approximately 70% of that water used for the irrigation of residential landscapes (Devitt et al., 2008). Many communities including Las Vegas continue to grow at a rapid pace while facing an uncertain future with regards to water resource availability. Water managers must plan for a future where more people exist, less water is available and some of the water available for use is of poorer quality. In light of this, are cities located in arid and semi arid regions sustainable? In particular, are urban landscapes sustainable with regards to water? Gleick et al (1995) defined sustainable water use as “the use of water that supports the ability of human society to endure and flourish into the indefinite future without undermining the integrity of the hydrological cycle or the ecological systems that depend on it”. Based on this definition, many communities in the southwest currently find it difficult to achieve water sustainability in the 21st century. Baker et al. (2004) suggested that a “severe drought might be the tipping point that will test the resilience of desert cities”. In the purest sense, landscapes are sustainable only if they do not require any additional resources, that they achieve a certain level of self sufficiency. Although this goal can be attained in wetter regions; arid and semi arid regions can only hope to move toward a greater level of water use sustainability. Such landscapes will need to be based on a concept of minimization; minimal landscape area and minimal irrigation, while still trying to provide aesthetic value and environmental function (modulations of water cycle during storm events, water quality, dust retention, etc.). It is therefore appropriate and critical that cities in arid regions implement conservation programs that emphasize significant water use reduction in urban landscapes.

Published
2010

23. Smart-phone and medical app use amongst Irish medical students: a survey of use and attitudes

Author

C Waters, B Stewart, D Devitt, P O’Connor, G A Browne, D O’Reilly, and O Tummon

Subjects
medicine.medical_specialty, Smart phone, business.industry, education, Internet privacy, Alternative medicine, Library science, General Medicine, General Biochemistry, Genetics and Molecular Biology, language.human_language, Irish, Single site, Poster Presentation, Smartphone app, ComputingMilieux_COMPUTERSANDEDUCATION, language, Medicine, Clinical education, business
Abstract

Background Studies in the UK and Canada reveal high smart-phone ownership rates with the majority of students viewing these devices as very useful with regards to their clinical education. Worryingly, low awareness basic privacy and security measures appears common amongst medical students. In Ireland, little is known regarding smartphone app ownership and use. This study sampled Irish undergraduate medical students at a single site.

Published
2015

28. Search for a Higgs Portal Scalar Decaying to Electron-Positron Pairs in the MicroBooNE Detector.

Author

Abratenko P, An R, Anthony J, Asaadi J, Ashkenazi A, Balasubramanian S, Baller B, Barnes C, Barr G, Basque V, Bathe-Peters L, Benevides Rodrigues O, Berkman S, Bhanderi A, Bhat A, Bishai M, Blake A, Bolton T, Book JY, Camilleri L, Caratelli D, Caro Terrazas I, Castillo Fernandez R, Cavanna F, Cerati G, Chen Y, Cianci D, Conrad JM, Convery M, Cooper-Troendle L, Crespo-Anadón JI, Del Tutto M, Dennis SR, Devitt D, Diurba R, Dorrill R, Duffy K, Dytman S, Eberly B, Ereditato A, Evans JJ, Fine R, Fiorentini Aguirre GA, Fitzpatrick RS, Fleming BT, Foppiani N, Franco D, Furmanski AP, Garcia-Gamez D, Gardiner S, Ge G, Gollapinni S, Goodwin O, Gramellini E, Green P, Greenlee H, Gu W, Guenette R, Guzowski P, Hagaman L, Hall E, Hen O, Horton-Smith GA, Hourlier A, Itay R, James C, Ji X, Jiang L, Jo JH, Johnson RA, Jwa YJ, Kamp N, Kaneshige N, Karagiorgi G, Ketchum W, Kirby M, Kobilarcik T, Kreslo I, LaZur R, Lepetic I, Li K, Li Y, Lin K, Littlejohn BR, Louis WC, Luo X, Manivannan K, Mariani C, Marsden D, Marshall J, Martinez Caicedo DA, Mason K, Mastbaum A, McConkey N, Meddage V, Mettler T, Miller K, Mills J, Mistry K, Mogan A, Mohayai T, Moon J, Mooney M, Moor AF, Moore CD, Mora Lepin L, Mousseau J, Murphy M, Naples D, Navrer-Agasson A, Neely RK, Nowak J, Nunes M, Palamara O, Paolone V, Papadopoulou A, Papavassiliou V, Pate SF, Paudel A, Pavlovic Z, Piasetzky E, Ponce-Pinto ID, Prince S, Qian X, Raaf JL, Radeka V, Rafique A, Reggiani-Guzzo M, Ren L, Rice LCJ, Rochester L, Rodriguez Rondon J, Rogers HE, Rosenberg M, Ross-Lonergan M, Scanavini G, Schmitz DW, Schukraft A, Seligman W, Shaevitz MH, Sharankova R, Shi J, Siegel H, Sinclair J, Smith A, Snider EL, Soderberg M, Söldner-Rembold S, Spentzouris P, Spitz J, Stancari M, John JS, Strauss T, Sutton K, Sword-Fehlberg S, Szelc AM, Tagg N, Tang W, Terao K, Thorpe C, Totani D, Toups M, Tsai YT, Uchida MA, Usher T, Van De Pontseele W, Viren B, Weber M, Wei H, Williams Z, Wolbers S, Wongjirad T, Wospakrik M, Wresilo K, Wright N, Wu W, Yandel E, Yang T, Yarbrough G, Yates LE, Zeller GP, Zennamo J, and Zhang C

Abstract

We present a search for the decays of a neutral scalar boson produced by kaons decaying at rest, in the context of the Higgs portal model, using the MicroBooNE detector. We analyze data triggered in time with the Fermilab NuMI neutrino beam spill, with an exposure of 1.93×10^{20} protons on target. We look for monoenergetic scalars that come from the direction of the NuMI hadron absorber, at a distance of 100 m from the detector, and decay to electron-positron pairs. We observe one candidate event, with a standard model background prediction of 1.9±0.8. We set an upper limit on the scalar-Higgs mixing angle of θ<(3.3-4.6)×10^{-4} at the 95% confidence level for scalar boson masses in the range (100-200)  MeV/c^{2}. We exclude, at the 95% confidence level, the remaining model parameters required to explain the central value of a possible excess of K&#95;{L}^{0}→π^{0}νν[over ¯] decays reported by the KOTO collaboration. We also provide a model-independent limit on a new boson X produced in K→πX decays and decaying to e^{+}e^{-}.

Published
2021
Full Text
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29. First Measurement of Differential Charged Current Quasielasticlike ν&#95;{μ}-Argon Scattering Cross Sections with the MicroBooNE Detector.

Author

Abratenko P, Alrashed M, An R, Anthony J, Asaadi J, Ashkenazi A, Balasubramanian S, Baller B, Barnes C, Barr G, Basque V, Bathe-Peters L, Benevides Rodrigues O, Berkman S, Bhanderi A, Bhat A, Bishai M, Blake A, Bolton T, Camilleri L, Caratelli D, Caro Terrazas I, Castillo Fernandez R, Cavanna F, Cerati G, Chen Y, Church E, Cianci D, Cohen EO, Conrad JM, Convery M, Cooper-Troendle L, Crespo-Anadón JI, Del Tutto M, Devitt D, Diurba R, Domine L, Dorrill R, Duffy K, Dytman S, Eberly B, Ereditato A, Escudero Sanchez L, Evans JJ, Fiorentini Aguirre GA, Fitzpatrick RS, Fleming BT, Foppiani N, Franco D, Furmanski AP, Garcia-Gamez D, Gardiner S, Gollapinni S, Goodwin O, Gramellini E, Green P, Greenlee H, Gu L, Gu W, Guenette R, Guzowski P, Hall E, Hamilton P, Hen O, Horton-Smith GA, Hourlier A, Huang EC, Itay R, James C, Jan de Vries J, Ji X, Jiang L, Jo JH, Johnson RA, Jwa YJ, Kamp N, Karagiorgi G, Ketchum W, Kirby B, Kirby M, Kobilarcik T, Kreslo I, LaZur R, Lepetic I, Li K, Li Y, Littlejohn BR, Lorca D, Louis WC, Luo X, Marchionni A, Marcocci S, Mariani C, Marsden D, Marshall J, Martin-Albo J, Martinez Caicedo DA, Mason K, Mastbaum A, McConkey N, Meddage V, Mettler T, Miller K, Mills J, Mistry K, Mogan A, Mohayai T, Moon J, Mooney M, Moor AF, Moore CD, Mousseau J, Murphy M, Naples D, Navrer-Agasson A, Neely RK, Nienaber P, Nowak J, Palamara O, Paolone V, Papadopoulou A, Papavassiliou V, Pate SF, Paudel A, Pavlovic Z, Piasetzky E, Ponce-Pinto ID, Porzio D, Prince S, Qian X, Raaf JL, Radeka V, Rafique A, Reggiani-Guzzo M, Ren L, Rochester L, Rodriguez Rondon J, Rogers HE, Rosenberg M, Ross-Lonergan M, Russell B, Scanavini G, Schmitz DW, Schukraft A, Shaevitz MH, Sharankova R, Sinclair J, Smith A, Snider EL, Soderberg M, Söldner-Rembold S, Soleti SR, Spentzouris P, Spitz J, Stancari M, John JS, Strauss T, Sutton K, Sword-Fehlberg S, Szelc AM, Tagg N, Tang W, Terao K, Thornton RT, Thorpe C, Toups M, Tsai YT, Tufanli S, Uchida MA, Usher T, Van De Pontseele W, Van de Water RG, Viren B, Weber M, Wei H, Williams Z, Wolbers S, Wongjirad T, Wospakrik M, Wu W, Yang T, Yarbrough G, Yates LE, Zeller GP, Zennamo J, and Zhang C

Abstract

We report on the first measurement of flux-integrated single differential cross sections for charged-current (CC) muon neutrino (ν&#95;{μ}) scattering on argon with a muon and a proton in the final state, ^{40}Ar (ν&#95;{μ},μp)X. The measurement was carried out using the Booster Neutrino Beam at Fermi National Accelerator Laboratory and the MicroBooNE liquid argon time projection chamber detector with an exposure of 4.59×10^{19} protons on target. Events are selected to enhance the contribution of CC quasielastic (CCQE) interactions. The data are reported in terms of a total cross section as well as single differential cross sections in final state muon and proton kinematics. We measure the integrated per-nucleus CCQE-like cross section (i.e., for interactions leading to a muon, one proton, and no pions above detection threshold) of (4.93±0.76&#95;{stat}±1.29&#95;{sys})×10^{-38}  cm^{2}, in good agreement with theoretical calculations. The single differential cross sections are also in overall good agreement with theoretical predictions, except at very forward muon scattering angles that correspond to low-momentum-transfer events.

Published
2020
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30. First Measurement of Inclusive Muon Neutrino Charged Current Differential Cross Sections on Argon at E&#95;{ν}∼0.8  GeV with the MicroBooNE Detector.

Author

Abratenko P, Adams C, Alrashed M, An R, Anthony J, Asaadi J, Ashkenazi A, Auger M, Balasubramanian S, Baller B, Barnes C, Barr G, Bass M, Bay F, Bhat A, Bhattacharya K, Bishai M, Blake A, Bolton T, Camilleri L, Caratelli D, Caro Terrazas I, Carr R, Castillo Fernandez R, Cavanna F, Cerati G, Chen Y, Church E, Cianci D, Cohen EO, Collin GH, Conrad JM, Convery M, Cooper-Troendle L, Crespo-Anadón JI, Del Tutto M, Devitt D, Diaz A, Domine L, Duffy K, Dytman S, Eberly B, Ereditato A, Escudero Sanchez L, Esquivel J, Evans JJ, Fitzpatrick RS, Fleming BT, Franco D, Furmanski AP, Garcia-Gamez D, Genty V, Goeldi D, Gollapinni S, Goodwin O, Gramellini E, Greenlee H, Grosso R, Gu L, Gu W, Guenette R, Guzowski P, Hackenburg A, Hamilton P, Hen O, Hill C, Horton-Smith GA, Hourlier A, Huang EC, James C, Jan de Vries J, Ji X, Jiang L, Johnson RA, Joshi J, Jostlein H, Jwa YJ, Karagiorgi G, Ketchum W, Kirby B, Kirby M, Kobilarcik T, Kreslo I, Lepetic I, Li Y, Lister A, Littlejohn BR, Lockwitz S, Lorca D, Louis WC, Luethi M, Lundberg B, Luo X, Marchionni A, Marcocci S, Mariani C, Marshall J, Martin-Albo J, Martinez Caicedo DA, Mason K, Mastbaum A, Meddage V, Mettler T, Mills J, Mistry K, Mogan A, Moon J, Mooney M, Moore CD, Mousseau J, Murphy M, Murrells R, Naples D, Nienaber P, Nowak J, Palamara O, Pandey V, Paolone V, Papadopoulou A, Papavassiliou V, Pate SF, Pavlovic Z, Piasetzky E, Porzio D, Pulliam G, Qian X, Raaf JL, Rafique A, Ren L, Rochester L, Rogers HE, Ross-Lonergan M, Rudolf von Rohr C, Russell B, Scanavini G, Schmitz DW, Schukraft A, Seligman W, Shaevitz MH, Sharankova R, Sinclair J, Smith A, Snider EL, Soderberg M, Söldner-Rembold S, Soleti SR, Spentzouris P, Spitz J, Stancari M, John JS, Strauss T, Sutton K, Sword-Fehlberg S, Szelc AM, Tagg N, Tang W, Terao K, Thomson M, Thornton RT, Toups M, Tsai YT, Tufanli S, Usher T, Van De Pontseele W, Van de Water RG, Viren B, Weber M, Wei H, Wickremasinghe DA, Wierman K, Williams Z, Wolbers S, Wongjirad T, Woodruff K, Wu W, Yang T, Yarbrough G, Yates LE, Zeller GP, Zennamo J, and Zhang C

Abstract

We report the first measurement of the double-differential and total muon neutrino charged current inclusive cross sections on argon at a mean neutrino energy of 0.8 GeV. Data were collected using the MicroBooNE liquid argon time projection chamber located in the Fermilab Booster neutrino beam and correspond to 1.6×10^{20} protons on target of exposure. The measured differential cross sections are presented as a function of muon momentum, using multiple Coulomb scattering as a momentum measurement technique, and the muon angle with respect to the beam direction. We compare the measured cross sections to multiple neutrino event generators and find better agreement with those containing more complete treatment of quasielastic scattering processes at low Q^{2}. The total flux integrated cross section is measured to be 0.693±0.010(stat)±0.165(syst)×10^{-38}  cm^{2}.

Published
2019
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31. The acquisition and retention of urinary catheterisation skills using surgical simulator devices: teaching method or student traits.

Author

Waters PS, McVeigh T, Kelly BD, Flaherty GT, Devitt D, Barry K, and Kerin MJ

Subjects
Female, Humans, Male, Retention, Psychology, Clinical Competence, Education, Medical, Undergraduate methods, Models, Anatomic, Urinary Catheterization
Abstract

Background: The acquisition of procedural skills is an essential component of learning for medical trainees. The objective of this study was to assess which teaching method of performing urinary catheterisation is associated with most efficient procedural skill acquisition and retention. We evaluated factors affecting acquisition and retention of skills when using simulators as adjuncts to medical training., Methods: Forty-two second year medical students were taught urinary catheter insertion using different teaching methods. The interactive group (n = 19) were taught using a lecture format presentation and a high fidelity human urinary catheter simulator. They were provided with the use of simulators prior to examination. The observer group (n = 12) were taught using the same method but without with simulator use prior to examination. The didactic group (n = 11) were taught using the presentation alone. Student characteristics such as hand dexterity and IQ were measured to assess for intrinsic differences. All students were examined at four weeks to measure skill retention., Results: Catheter scores were significantly higher in the interactive group (p < 0.005). Confidence scores with catheter insertion were similar at index exam however were significantly lower in the didactic group at the retention testing (p < 0.05). Retention scores were higher in the interactive group (p < 0.001). A significant positive correlation was observed between laparoscopy scores and time to completion with overall catheter score (p < 0.05). Teaching method, spatial awareness and time to completion of laparoscopy were significantly associated with higher catheter scores at index exam (p = 0.001). Retention scores at 4 weeks were significantly associated with teaching method and original catheter score (p = 0.001)., Conclusion: The importance of simulators in teaching a complex procedural skill has been highlighted. Didactic teaching method was associated with a significantly higher rate of learning decay at retention testing.

Published
2014
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32. Interns' attitudes to IV cannulation: a KAP study.

Author

Carr PJ, Glynn RW, Dineen B, Devitt D, Flaherty G, Kropmans TJ, and Kerin M

Subjects
Humans, Surveys and Questionnaires, Attitude of Health Personnel, Catheterization, Peripheral nursing, Catheterization, Peripheral psychology, Catheterization, Peripheral standards, Health Knowledge, Attitudes, Practice, Internship and Residency, Medical Staff, Hospital psychology
Abstract

Unlabelled: One of the most common procedures for junior medical doctors is peripheral intravenous cannulation (PIVC). Considering this, an understanding of the peripheral intravenous cannulation procedure is paramount., Aim: The objective of this study was to identify the level of understanding of interns regarding intravenous cannulation., Method: An anonymized structured questionnaire using a knowledge attitude and practices (KAP) format was distributed to 60 interns affiliated to a university college hospital in Ireland., Findings: This study suggests that interns are poorly prepared for one of the most common clinical skills they will perform. They showed poor understanding of whether peripheral cannulation is a clean or aseptic technique, and lacked knowledge of the potential side effects of peripheral cannulation and IV therapy., Recommendations: A structured learning module on peripheral intravenous cannulation is required. A rigid, evidence-based, Objective Structured Clinical Examination (OSCE) on peripheral cannulation is recommended. The reduction of junior doctors' weekly working hours to 48 under the European Working Time Directive offers the potential for nurses to take ownership of IV cannulation. This will allow junior doctors to focus on other clinical skills and assessments, which can only be to the advantage of the patient.

Published
2011
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33. The ability of ultrasonography, magnetic resonance imaging and bone mineral densitometry to predict the strength of human Achilles' tendons.

Author

Devitt D, Koike Y, Doherty GP, Ramachandran N, Dinh L, Uhthoff HK, Lecompte M, and Trudel G

Subjects
Absorptiometry, Photon methods, Aged, Biomechanical Phenomena, Cadaver, Cross-Sectional Studies, Female, Humans, Magnetic Resonance Imaging methods, Male, Middle Aged, Predictive Value of Tests, Probability, Sensitivity and Specificity, Stress, Mechanical, Tendon Injuries diagnosis, Tendon Injuries etiology, Ultrasonography, Doppler methods, Achilles Tendon physiopathology, Diagnostic Imaging methods, Tensile Strength physiology
Abstract

Objective: To assess the value of ultrasonography (US), magnetic resonance imaging (MRI), and bone mineral densitometry (BMD) in evaluating human Achilles' tendon strength., Design: Cross-sectional observational study., Setting: Tertiary care hospital., Participants: Ninety-eight Achilles' tendons from 49 consecutive cadavers (26 men and 23 women with a mean age of 66.6 years) undergoing hospital autopsy were assessed., Interventions: Not applicable., Main Outcome Measures: Tendon dimensions on US and MRI, and T1-weighted optical density were measured. Areas of hypodensity, hyperdensity, calcification, and heterogeneity were identified on US. The BMD of each calcaneus was recorded. The tendons were mechanically tested to determine peak load at failure., Results: Sixteen patients (32.7%, 27 tendons) had abnormalities in 1 or both tendons on US and/or MRI (17 on US, 17 on MRI). Fifty-seven tendons (58%) ruptured in their midsubstance, at an average peak load of 4722+/-990N. Tendons with and without abnormalities on imaging had similar strengths (P>.05). Calcaneal BMD correlated weakly with peak load at failure (r=.21, P<.05)., Conclusions: The prevalence of Achilles' tendons abnormalities on US or MRI was 32.7% in our study group. Abnormalities on clinical imaging (US or MRI) were not predictive of the load at failure. Therefore, tendons with imaging abnormalities are not necessarily weaker, and one cannot predict the likelihood of rupture based on imaging results. Further, higher-powered studies could explore the ability of BMD to detect minimal clinically important differences and to predict Achilles' tendon weakness.

Published
2009
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