Proposal: A Search for Sterile Neutrino at J-PARC Materials and Life Science Experimental Facility

Harada, Masahide; Mills, G. B.; Iwai, E.; Suekane, F.; Meigo, Shin-ichiro; Yeh, M.; Kasugai, Yoshimi; Nomachi, M.; Furuta, H.; Niiyama, M.; Hasegawa, S.; Enomoto, Takahiro; Shima, T.; Water, R. Van de; Maruyama, T.; Sakai, Hisakazu; Louis, W.C.; Nishikawa, K.; Ajimura, S.; Chauveau, E.; Ohta, R.; Hiraiwa, T.; Sakamoto, Shinichi; Nakano, T.; Bezerra, T. J. C.; Garvey, G. T.; Suzuya, Kentaro; Sakai, Kazuhiro

doi:10.48550/arxiv.1310.1437

Cited by 26 publications

(46 citation statements)

References 19 publications

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“…We conclude that models of the event excess based on entering and exiting photons are disfavored. The MiniBooNE event excess will be further studied by the Fermilab short-baseline neutrino (SBN) program [33] and by the JSNS 2 experiment at J-PARC [34].…”

Section: Hypothesismentioning

confidence: 99%

Updated MiniBooNE Neutrino Oscillation Results with Increased Data and New Background Studies

Aguilar-Arevalo,

Brown,

Conrad

et al. 2020

Preprint

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The MiniBooNE experiment at Fermilab reports a total excess of 638.0±132.8 electron-like events (4.8σ) from a data sample corresponding to 18.75×10 20 protons-on-target in neutrino mode, which is a 46% increase in the data sample with respect to previously published results, and 11.27 × 10 20 protons-on-target in antineutrino mode. The additional statistics allow several studies to address questions on the source of the excess. First, we provide two-dimensional plots in visible energy and cosine of the angle of the outgoing lepton, which can provide valuable input to models for the event excess. Second, we test whether the excess may arise from photons that enter the detector from external events or photons exiting the detector from π 0 decays in two model independent ways. Beam timing information shows that almost all of the excess is in time with neutrinos that interact in the detector. The radius distribution shows that the excess is distributed throughout the volume, while tighter cuts on the fiducal volume increase the significance of the excess. We conclude that models of the event excess based on entering and exiting photons are disfavored.

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Section: Hypothesismentioning

confidence: 99%

Updated MiniBooNE Neutrino Oscillation Results with Increased Data and New Background Studies

Aguilar-Arevalo,

Brown,

Conrad

et al. 2020

Preprint

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“…Therefore, this could be a serious correlated background for the E56 experiment. The flux of such fast neutrons at the third floor of MLF was estimated to be some orders of magnitude smaller than that in the first floor [1]. We briefly describe the basic idea and backgrounds of this measurement.…”

Section: Fast Neutrons Background From Beammentioning

confidence: 98%

“…One of the main purposes of the background measurement is to measure the Michel electron background induced by beam fast neutrons, which was indicated by the previous background measurement at the first floor of MLF building [1]. According to Geant4, fast neutrons whose kinetic energy are larger than 200 MeV can produce charged pions.…”

Section: Fast Neutrons Background From Beammentioning

confidence: 99%

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On-site background measurements for the J-PARC E56 experiment: A search for the sterile neutrino at J-PARC MLF

Ajimura

Bezerra

Chauveau

et al. 2015

Progress of Theoretical and Experimental Physics

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The J-PARC E56 experiment aims to search for sterile neutrinos at the J-PARC Materials and Life Science Experimental Facility (MLF). In order to examine the feasibility of the experiment, we measured the background rates of different detector candidate sites, which are located at the third floor of the MLF, using a detector consisting of plastic scintillators with a fiducial mass of 500 kg. The gammas and neutrons induced by the beam as well as the backgrounds from the cosmic rays were measured, and the results are described in this article.

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“…estimated 30,000-50,000 KDAR ν µ CC events/year on carbon collected over a 3 year data taking run [51,52].…”

Section: Future Prospects For Kdar Cross Section Measurementsmentioning

confidence: 99%

Modeling quasielastic interactions of monoenergetic kaon decay-at-rest neutrinos

Nikolakopoulos,

Pandey,

Spitz

et al. 2020

Preprint

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Monoenergetic muon neutrinos at 236 MeV are readily produced in intense medium-energy proton facilities ( 2-3 GeV) when a positive kaon decays at rest (KDAR; K + → µ + νµ). These neutrinos provide a unique opportunity to both study the neutrino interaction and probe the nucleus with a monoenergetic weak-interaction-only tool. We present cross section calculations for quasielastic scattering of these 236 MeV neutrinos off 12 C and 40 Ar, paying special attention to low-energy aspects of the scattering process. Our model takes the description of the nucleus in a mean-field (MF) approach as the starting point, where we solve Hartree-Fock (HF) equations using a Skyrme type nucleon-nucleon interaction. Thereby, we introduce long-range nuclear correlations by means of a continuum random phase approximation (CRPA) framework where we solve the CRPA equations using a Green's function method. The model successfully describes (e, e ) data on 12 C and 40 Ca in the kinematic region that overlaps with the KDAR νµ phase space. In addition to these results, we present future prospects for precision KDAR cross section measurements and applications of our calculations in current and future experiments that will utilize these neutrinos.

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Proposal: A Search for Sterile Neutrino at J-PARC Materials and Life Science Experimental Facility

Cited by 26 publications

References 19 publications

Updated MiniBooNE Neutrino Oscillation Results with Increased Data and New Background Studies

Updated MiniBooNE Neutrino Oscillation Results with Increased Data and New Background Studies

On-site background measurements for the J-PARC E56 experiment: A search for the sterile neutrino at J-PARC MLF

Modeling quasielastic interactions of monoenergetic kaon decay-at-rest neutrinos

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