在MINOS实验中寻找与μ子中微子混合的 sterile 中微子。

Search for Sterile Neutrinos Mixing with Muon Neutrinos in MINOS.

作者信息

Adamson P, Anghel I, Aurisano A, Barr G, Bishai M, Blake A, Bock G J, Bogert D, Cao S V, Carroll T J, Castromonte C M, Chen R, Childress S, Coelho J A B, Corwin L, Cronin-Hennessy D, de Jong J K, De Rijck S, Devan A V, Devenish N E, Diwan M V, Escobar C O, Evans J J, Falk E, Feldman G J, Flanagan W, Frohne M V, Gabrielyan M, Gallagher H R, Germani S, Gomes R A, Goodman M C, Gouffon P, Graf N, Gran R, Grzelak K, Habig A, Hahn S R, Hartnell J, Hatcher R, Holin A, Huang J, Hylen J, Irwin G M, Isvan Z, James C, Jensen D, Kafka T, Kasahara S M S, Koizumi G, Kordosky M, Kreymer A, Lang K, Ling J, Litchfield P J, Lucas P, Mann W A, Marshak M L, Mayer N, McGivern C, Medeiros M M, Mehdiyev R, Meier J R, Messier M D, Miller W H, Mishra S R, Moed Sher S, Moore C D, Mualem L, Musser J, Naples D, Nelson J K, Newman H B, Nichol R J, Nowak J A, O'Connor J, Orchanian M, Pahlka R B, Paley J, Patterson R B, Pawloski G, Perch A, Pfützner M M, Phan D D, Phan-Budd S, Plunkett R K, Poonthottathil N, Qiu X, Radovic A, Rebel B, Rosenfeld C, Rubin H A, Sail P, Sanchez M C, Schneps J, Schreckenberger A, Schreiner P, Sharma R, Sousa A, Tagg N, Talaga R L, Thomas J, Thomson M A, Tian X, Timmons A, Todd J, Tognini S C, Toner R, Torretta D, Tzanakos G, Urheim J, Vahle P, Viren B, Weber A, Webb R C, White C, Whitehead L, Whitehead L H, Wojcicki S G, Zwaska R

机构信息

Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.

Argonne National Laboratory, Argonne, Illinois 60439, USA.

出版信息

Phys Rev Lett. 2016 Oct 7;117(15):151803. doi: 10.1103/PhysRevLett.117.151803.

DOI:10.1103/PhysRevLett.117.151803

PMID:27768323

Abstract

We report results of a search for oscillations involving a light sterile neutrino over distances of 1.04 and 735 km in a ν_{μ}-dominated beam with a peak energy of 3 GeV. The data, from an exposure of 10.56×10^{20} protons on target, are analyzed using a phenomenological model with one sterile neutrino. We constrain the mixing parameters θ_{24} and Δm_{41}^{2} and set limits on parameters of the four-dimensional Pontecorvo-Maki-Nakagawa-Sakata matrix, |U_{μ4}|^{2} and |U_{τ4}|^{2}, under the assumption that mixing between ν_{e} and ν_{s} is negligible (|U_{e4}|^{2}=0). No evidence for ν_{μ}→ν_{s} transitions is found and we set a world-leading limit on θ_{24} for values of Δm_{41}^{2}≲1 eV^{2}.

摘要

我们报告了在一个峰值能量为3 GeV的以νμ为主的束流中，对涉及轻惰性中微子在1.04千米和735千米距离上振荡的搜索结果。利用10.56×10²⁰个靶上质子的曝光数据，采用包含一个惰性中微子的唯象模型进行分析。在假设νe和νs之间的混合可忽略不计（|Ue4|² = 0）的情况下，我们对混合参数θ₂₄和Δm₄₁²进行了约束，并对四维庞蒂科夫 - 牧 - 中川 - 坂田矩阵的参数|Uμ4|²和|Uτ4|²设定了限制。未发现νμ→νs跃迁的证据，并且我们为Δm₄₁²≲1 eV²的值设定了世界领先的θ₂₄限制。