New Constraints on Tau-Coupled Heavy Neutral Leptons with Masses mN=280-970 MeV

R. Acciarri; C. Adams; J. Asaadi; B. Baller; V. Basque; F. Cavanna; A. De Gouvêa; R. S. Fitzpatrick; B. Fleming; P. Green; C. James; K. J. Kelly; I. Lepetic; X. Luo; O. Palamara; G. Scanavini; M. Soderberg; J. Spitz; A. M. Szelc; W. Wu; T. Yang

doi:10.1103/PhysRevLett.127.121801

New Constraints on Tau-Coupled Heavy Neutral Leptons with Masses mN=280-970 MeV

R. Acciarri, C. Adams, J. Asaadi, B. Baller, V. Basque, F. Cavanna, A. De Gouvêa, R. S. Fitzpatrick, B. Fleming, P. Green, C. James, K. J. Kelly, I. Lepetic, X. Luo, O. Palamara, G. Scanavini, M. Soderberg, J. Spitz, A. M. Szelc, W. WuT. Yang

Department of Physics

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15 Scopus citations

Abstract

A search for heavy neutral leptons has been performed with the ArgoNeuT detector exposed to the NuMI neutrino beam at Fermilab. We search for the decay signature N→νμ+μ-, considering decays occurring both inside ArgoNeuT and in the upstream cavern. In the data, corresponding to an exposure to 1.25×1020 POT, zero passing events are observed consistent with the expected background. This measurement leads to a new constraint at 90% confidence level on the mixing angle |UτN|2 of tau-coupled Dirac heavy neutral leptons with masses mN=280-970 MeV, assuming |UeN|2=|UμN|2=0.

Original language	English (US)
Article number	121801
Journal	Physical Review Letters
Volume	127
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.127.121801
State	Published - Sep 17 2021

ASJC Scopus subject areas

Physics and Astronomy(all)

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Acciarri, R., Adams, C., Asaadi, J., Baller, B., Basque, V., Cavanna, F., De Gouvêa, A., Fitzpatrick, R. S., Fleming, B., Green, P., James, C., Kelly, K. J., Lepetic, I., Luo, X., Palamara, O., Scanavini, G., Soderberg, M., Spitz, J., Szelc, A. M., ... Yang, T. (2021). New Constraints on Tau-Coupled Heavy Neutral Leptons with Masses mN=280-970 MeV. Physical Review Letters, 127(12), [121801]. https://doi.org/10.1103/PhysRevLett.127.121801

Acciarri, R, Adams, C, Asaadi, J, Baller, B, Basque, V, Cavanna, F, De Gouvêa, A, Fitzpatrick, RS, Fleming, B, Green, P, James, C, Kelly, KJ, Lepetic, I, Luo, X, Palamara, O, Scanavini, G, Soderberg, M, Spitz, J, Szelc, AM, Wu, W & Yang, T 2021, 'New Constraints on Tau-Coupled Heavy Neutral Leptons with Masses mN=280-970 MeV', Physical Review Letters, vol. 127, no. 12, 121801. https://doi.org/10.1103/PhysRevLett.127.121801

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title = "New Constraints on Tau-Coupled Heavy Neutral Leptons with Masses mN=280-970 MeV",

abstract = "A search for heavy neutral leptons has been performed with the ArgoNeuT detector exposed to the NuMI neutrino beam at Fermilab. We search for the decay signature N→νμ+μ-, considering decays occurring both inside ArgoNeuT and in the upstream cavern. In the data, corresponding to an exposure to 1.25×1020 POT, zero passing events are observed consistent with the expected background. This measurement leads to a new constraint at 90% confidence level on the mixing angle |UτN|2 of tau-coupled Dirac heavy neutral leptons with masses mN=280-970 MeV, assuming |UeN|2=|UμN|2=0.",

author = "R. Acciarri and C. Adams and J. Asaadi and B. Baller and V. Basque and F. Cavanna and {De Gouv{\^e}a}, A. and Fitzpatrick, {R. S.} and B. Fleming and P. Green and C. James and Kelly, {K. J.} and I. Lepetic and X. Luo and O. Palamara and G. Scanavini and M. Soderberg and J. Spitz and Szelc, {A. M.} and W. Wu and T. Yang",

note = "Funding Information: This manuscript has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. We gratefully acknowledge the cooperation of the MINOS Collaboration in providing their data for use in this analysis. We wish to acknowledge the support of Fermilab, the Department of Energy, and the National Science Foundation in ArgoNeuT{\textquoteright}s construction, operation, and data analysis. This project has received funding from the Science and Technology Facilities Council (STFC), part of the United Kingdom Research and Innovation; and from the Royal Society UK Grants No. RGF\EA\180209 and No. UF140089. We thank Dr. Leigh Whitehead for his assistance processing the MINOS-ND data. Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society.",

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AU - Acciarri, R.

AU - Adams, C.

AU - Asaadi, J.

AU - Baller, B.

AU - Basque, V.

AU - Cavanna, F.

AU - De Gouvêa, A.

AU - Fitzpatrick, R. S.

AU - Fleming, B.

AU - Green, P.

AU - James, C.

AU - Kelly, K. J.

AU - Lepetic, I.

AU - Luo, X.

AU - Palamara, O.

AU - Scanavini, G.

AU - Soderberg, M.

AU - Spitz, J.

AU - Szelc, A. M.

AU - Wu, W.

AU - Yang, T.

N1 - Funding Information: This manuscript has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. We gratefully acknowledge the cooperation of the MINOS Collaboration in providing their data for use in this analysis. We wish to acknowledge the support of Fermilab, the Department of Energy, and the National Science Foundation in ArgoNeuT’s construction, operation, and data analysis. This project has received funding from the Science and Technology Facilities Council (STFC), part of the United Kingdom Research and Innovation; and from the Royal Society UK Grants No. RGF\EA\180209 and No. UF140089. We thank Dr. Leigh Whitehead for his assistance processing the MINOS-ND data. Publisher Copyright: © 2021 authors. Published by the American Physical Society.

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N2 - A search for heavy neutral leptons has been performed with the ArgoNeuT detector exposed to the NuMI neutrino beam at Fermilab. We search for the decay signature N→νμ+μ-, considering decays occurring both inside ArgoNeuT and in the upstream cavern. In the data, corresponding to an exposure to 1.25×1020 POT, zero passing events are observed consistent with the expected background. This measurement leads to a new constraint at 90% confidence level on the mixing angle |UτN|2 of tau-coupled Dirac heavy neutral leptons with masses mN=280-970 MeV, assuming |UeN|2=|UμN|2=0.

AB - A search for heavy neutral leptons has been performed with the ArgoNeuT detector exposed to the NuMI neutrino beam at Fermilab. We search for the decay signature N→νμ+μ-, considering decays occurring both inside ArgoNeuT and in the upstream cavern. In the data, corresponding to an exposure to 1.25×1020 POT, zero passing events are observed consistent with the expected background. This measurement leads to a new constraint at 90% confidence level on the mixing angle |UτN|2 of tau-coupled Dirac heavy neutral leptons with masses mN=280-970 MeV, assuming |UeN|2=|UμN|2=0.

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New Constraints on Tau-Coupled Heavy Neutral Leptons with Masses mN=280-970 MeV

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