Eur. Phys. J. C (2022) 82: 807
https://doi.org/10.1140/epjc/s10052-022-10721-2

Regular Article - Experimental Physics

Low energy event reconstruction in IceCube DeepCore

¹ III. Physikalisches Institut, RWTH Aachen University, 52056, Aachen, Germany
² Department of Physics, University of Adelaide, 5005, Adelaide, Australia
³ Department of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., 99508, Anchorage, AK, USA
⁴ Department of Physics, University of Texas at Arlington, 502 Yates St., Science Hall Rm 108, Box 19059, 76019, Arlington, TX, USA
⁵ CTSPS, Clark-Atlanta University, 30314, Atlanta, GA, USA
⁶ School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, 30332, Atlanta, GA, USA
⁷ Department of Physics, Southern University, 70813, Baton Rouge, LA, USA
⁸ Department of Physics, University of California, 94720, Berkeley, CA, USA
⁹ Lawrence Berkeley National Laboratory, 94720, Berkeley, CA, USA
¹⁰ Institut für Physik, Humboldt-Universität zu Berlin, 12489, Berlin, Germany
¹¹ Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, 44780, Bochum, Germany
¹² Science Faculty CP230, Université Libre de Bruxelles, 1050, Brussels, Belgium
¹³ Dienst ELEM, Vrije Universiteit Brussel (VUB), 1050, Brussels, Belgium
¹⁴ Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, 02138, Cambridge, MA, USA
¹⁵ Department of Physics, Massachusetts Institute of Technology, 02139, Cambridge, MA, USA
¹⁶ Department of Physics, The International Center for Hadron Astrophysics, Chiba University, 263-8522, Chiba, Japan
¹⁷ Department of Physics, Loyola University Chicago, 60660, Chicago, IL, USA
¹⁸ Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand
¹⁹ Department of Physics, University of Maryland, 20742, College Park, MD, USA
²⁰ Department of Astronomy, Ohio State University, 43210, Columbus, OH, USA
²¹ Department of Physics, Center for Cosmology and Astro-Particle Physics, Ohio State University, 43210, Columbus, OH, USA
²² Niels Bohr Institute, University of Copenhagen, 2100, Copenhagen, Denmark
²³ Department of Physics, TU Dortmund University, 44221, Dortmund, Germany
²⁴ Department of Physics and Astronomy, Michigan State University, 48824, East Lansing, MI, USA
²⁵ Department of Physics, University of Alberta, T6G 2E1, Edmonton, AB, Canada
²⁶ Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058, Erlangen, Germany
²⁷ Physik-department, Technische Universität München, 85748, Garching, Germany
²⁸ Département de physique nucléaire et corpusculaire, Université de Genève, 1211, Geneva, Switzerland
²⁹ Department of Physics and Astronomy, University of Gent, 9000, Gent, Belgium
³⁰ Department of Physics and Astronomy, University of California, 92697, Irvine, CA, USA
³¹ Karlsruhe Institute of Technology, Institute for Astroparticle Physics, 76021, Karlsruhe, Germany
³² Karlsruhe Institute of Technology, Institute of Experimental Particle Physics, 76021, Karlsruhe, Germany
³³ Department of Physics, Engineering Physics, and Astronomy, Queen’s University, K7L 3N6, Kingston, ON, Canada
³⁴ Department of Physics and Astronomy, University of Kansas, 66045, Lawrence, KS, USA
³⁵ Department of Physics and Astronomy, UCLA, 90095, Los Angeles, CA, USA
³⁶ Centre for Cosmology, Particle Physics and Phenomenology-CP3, Université catholique de Louvain, Louvain-la-Neuve, Belgium
³⁷ Department of Physics, Mercer University, 31207-0001, Macon, GA, USA
³⁸ Department of Astronomy, University of Wisconsin–Madison, 53706, Madison, WI, USA
³⁹ Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin–Madison, 53706, Madison, WI, USA
⁴⁰ Institute of Physics, University of Mainz, Staudinger Weg 7, 55099, Mainz, Germany
⁴¹ Department of Physics, Marquette University, 53201, Milwaukee, WI, USA
⁴² Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149, Münster, Germany
⁴³ Department of Physics and Astronomy, Bartol Research Institute, University of Delaware, 19716, Newark, DE, USA
⁴⁴ Department of Physics, Yale University, 06520, New Haven, CT, USA
⁴⁵ Department of Physics, University of Oxford, Parks Road, OX1 3PU, Oxford, UK
⁴⁶ Department of Physics, Drexel University, 3141 Chestnut Street, 19104, Philadelphia, PA, USA
⁴⁷ Physics Department, South Dakota School of Mines and Technology, 57701, Rapid City, SD, USA
⁴⁸ Department of Physics, University of Wisconsin, 54022, River Falls, WI, USA
⁴⁹ Department of Physics and Astronomy, University of Rochester, 14627, Rochester, NY, USA
⁵⁰ Department of Physics and Astronomy, University of Utah, 84112, Salt Lake City, UT, USA
⁵¹ Department of Physics, Oskar Klein Centre, Stockholm University, 10691, Stockholm, Sweden
⁵² Department of Physics and Astronomy, Stony Brook University, 11794-3800, Stony Brook, NY, USA
⁵³ Department of Physics, Sungkyunkwan University, 16419, Suwon, South Korea
⁵⁴ Institute of Basic Science, Sungkyunkwan University, 16419, Suwon, South Korea
⁵⁵ Institute of Physics, Academia Sinica, 11529, Taipei, Taiwan
⁵⁶ Department of Physics and Astronomy, University of Alabama, 35487, Tuscaloosa, AL, USA
⁵⁷ Department of Astronomy and Astrophysics, Pennsylvania State University, 16802, University Park, PA, USA
⁵⁸ Department of Physics, Pennsylvania State University, 16802, University Park, PA, USA
⁵⁹ Department of Physics and Astronomy, Uppsala University, Box 516, 75120, Uppsala, Sweden
⁶⁰ Department of Physics, University of Wuppertal, 42119, Wuppertal, Germany
⁶¹ DESY, 15738, Zeuthen, Germany
⁶² Università di Padova, 35131, Padua, Italy
⁶³ Earthquake Research Institute, University of Tokyo, Bunkyo, 113-0032, Tokyo, Japan

^cv analysis@icecube.wisc.edu

Received: 4 March 2022
Accepted: 18 August 2022
Published online: 9 September 2022

Abstract

The reconstruction of event-level information, such as the direction or energy of a neutrino interacting in IceCube DeepCore, is a crucial ingredient to many physics analyses. Algorithms to extract this high level information from the detector’s raw data have been successfully developed and used for high energy events. In this work, we address unique challenges associated with the reconstruction of lower energy events in the range of a few to hundreds of GeV and present two separate, state-of-the-art algorithms. One algorithm focuses on the fast directional reconstruction of events based on unscattered light. The second algorithm is a likelihood-based multipurpose reconstruction offering superior resolutions, at the expense of larger computational cost.