Improving the neutrino mass hierarchy identification with inelasticity measurement in PINGU and ORCA
Multimegaton scale in under-ice and underwater detectors of atmospheric neutrinos with a few GeV energy threshold (PINGU, ORCA) open up new possibilities in the determination of neutrino properties, and in particular the neutrino mass hierarchy. With a dense array of optical modules it will be possi...
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Online Access: | https://doi.org/10.1103/PhysRevD.87.113007 http://infoscience.epfl.ch/record/188953 |
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ftinfoscience:oai:infoscience.tind.io:188953 2023-05-15T17:53:36+02:00 Improving the neutrino mass hierarchy identification with inelasticity measurement in PINGU and ORCA Ribordy, Mathieu Smirnov, A. Yu. 2013-10-01T07:28:27Z https://doi.org/10.1103/PhysRevD.87.113007 http://infoscience.epfl.ch/record/188953 unknown College Pk, Amer Physical Soc doi:10.1103/PhysRevD.87.113007 ISI:000320764600002 http://infoscience.epfl.ch/record/188953 http://infoscience.epfl.ch/record/188953 Text 2013 ftinfoscience https://doi.org/10.1103/PhysRevD.87.113007 2023-02-13T22:15:58Z Multimegaton scale in under-ice and underwater detectors of atmospheric neutrinos with a few GeV energy threshold (PINGU, ORCA) open up new possibilities in the determination of neutrino properties, and in particular the neutrino mass hierarchy. With a dense array of optical modules it will be possible to determine the inelasticity, y, of the charged current nu(mu) events in addition to the neutrino energy E-nu and the muon zenith angle theta(mu). The discovery potential of the detectors will substantially increase with the measurement of y. It will enable (i) a partial separation of the neutrino and antineutrino signals, (ii) a better reconstruction of the neutrino direction, (iii) the reduction of the neutrino parameters degeneracy, (iv) a better control of systematic uncertainties, and (v) a better identification of the nu(mu) events. It will improve the sensitivity to the CP-violation phase. The three-dimensional (E-nu, theta(mu), y), nu(mu) oscillograms with the kinematical as well as the experimental smearing are computed. We present the asymmetry distributions in the E-nu - theta(mu) plane for different intervals of y and study their properties. We show that the inelasticity information reduces the effect of degeneracy of parameters by 30%. With the inelasticity, the total significance of establishing mass hierarchy may increase by (20-50)%, thus effectively increasing the volume of the detector by a factor of 1.5-2. Text Orca EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) Pingu ENVELOPE(-52.017,-52.017,67.067,67.067) Physical Review D 87 11 |
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EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) |
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Multimegaton scale in under-ice and underwater detectors of atmospheric neutrinos with a few GeV energy threshold (PINGU, ORCA) open up new possibilities in the determination of neutrino properties, and in particular the neutrino mass hierarchy. With a dense array of optical modules it will be possible to determine the inelasticity, y, of the charged current nu(mu) events in addition to the neutrino energy E-nu and the muon zenith angle theta(mu). The discovery potential of the detectors will substantially increase with the measurement of y. It will enable (i) a partial separation of the neutrino and antineutrino signals, (ii) a better reconstruction of the neutrino direction, (iii) the reduction of the neutrino parameters degeneracy, (iv) a better control of systematic uncertainties, and (v) a better identification of the nu(mu) events. It will improve the sensitivity to the CP-violation phase. The three-dimensional (E-nu, theta(mu), y), nu(mu) oscillograms with the kinematical as well as the experimental smearing are computed. We present the asymmetry distributions in the E-nu - theta(mu) plane for different intervals of y and study their properties. We show that the inelasticity information reduces the effect of degeneracy of parameters by 30%. With the inelasticity, the total significance of establishing mass hierarchy may increase by (20-50)%, thus effectively increasing the volume of the detector by a factor of 1.5-2. |
format |
Text |
author |
Ribordy, Mathieu Smirnov, A. Yu. |
spellingShingle |
Ribordy, Mathieu Smirnov, A. Yu. Improving the neutrino mass hierarchy identification with inelasticity measurement in PINGU and ORCA |
author_facet |
Ribordy, Mathieu Smirnov, A. Yu. |
author_sort |
Ribordy, Mathieu |
title |
Improving the neutrino mass hierarchy identification with inelasticity measurement in PINGU and ORCA |
title_short |
Improving the neutrino mass hierarchy identification with inelasticity measurement in PINGU and ORCA |
title_full |
Improving the neutrino mass hierarchy identification with inelasticity measurement in PINGU and ORCA |
title_fullStr |
Improving the neutrino mass hierarchy identification with inelasticity measurement in PINGU and ORCA |
title_full_unstemmed |
Improving the neutrino mass hierarchy identification with inelasticity measurement in PINGU and ORCA |
title_sort |
improving the neutrino mass hierarchy identification with inelasticity measurement in pingu and orca |
publisher |
College Pk, Amer Physical Soc |
publishDate |
2013 |
url |
https://doi.org/10.1103/PhysRevD.87.113007 http://infoscience.epfl.ch/record/188953 |
long_lat |
ENVELOPE(-52.017,-52.017,67.067,67.067) |
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Pingu |
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Pingu |
genre |
Orca |
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Orca |
op_source |
http://infoscience.epfl.ch/record/188953 |
op_relation |
doi:10.1103/PhysRevD.87.113007 ISI:000320764600002 http://infoscience.epfl.ch/record/188953 |
op_doi |
https://doi.org/10.1103/PhysRevD.87.113007 |
container_title |
Physical Review D |
container_volume |
87 |
container_issue |
11 |
_version_ |
1766161297214275584 |