학술논문
Search for Unstable Sterile Neutrinos with the IceCube Neutrino Observatory
Document Type
article
Author
Abbasi, R; Ackermann, M; Adams, J; Aguilar, JA; Ahlers, M; Ahrens, M; Alameddine, JM; Alves, AA; Amin, NM; Andeen, K; Anderson, T; Anton, G; Argüelles, C; Ashida, Y; Axani, S; Bai, X; V., A Balagopal; Barwick, SW; Bastian, B; Basu, V; Baur, S; Bay, R; Beatty, JJ; Becker, K-H; Tjus, J Becker; Beise, J; Bellenghi, C; Benda, S; BenZvi, S; Berley, D; Bernardini, E; Besson, DZ; Binder, G; Bindig, D; Blaufuss, E; Blot, S; Boddenberg, M; Bontempo, F; Book, JY; Borowka, J; Böser, S; Botner, O; Böttcher, J; Bourbeau, E; Bradascio, F; Braun, J; Brinson, B; Bron, S; Brostean-Kaiser, J; Burley, RT; Busse, RS; Campana, MA; Carnie-Bronca, EG; Chen, C; Chen, Z; Chirkin, D; Choi, K; Clark, BA; Clark, K; Classen, L; Coleman, A; Collin, GH; Conrad, JM; Coppin, P; Correa, P; Cowen, DF; Cross, R; Dappen, C; Dave, P; De Clercq, C; DeLaunay, JJ; López, D Delgado; Dembinski, H; Deoskar, K; Desai, A; Desiati, P; de Vries, KD; de Wasseige, G; de With, M; DeYoung, T; Diaz, A; Díaz-Vélez, JC; Dittmer, M; Dujmovic, H; Dunkman, M; DuVernois, MA; Ehrhardt, T; Eller, P; Engel, R; Erpenbeck, H; Evans, J; Evenson, PA; Fan, KL; Fazely, AR; Fedynitch, A; Feigl, N; Fiedlschuster, S; Fienberg, AT; Finley, C; Fischer, L
Source
Physical Review Letters. 129(15)
Subject
Language
Abstract
We present a search for an unstable sterile neutrino by looking for a resonant signal in eight years of atmospheric ν_{μ} data collected from 2011 to 2019 at the IceCube Neutrino Observatory. Both the (stable) three-neutrino and the 3+1 sterile neutrino models are disfavored relative to the unstable sterile neutrino model, though with p values of 2.8% and 0.81%, respectively, we do not observe evidence for 3+1 neutrinos with neutrino decay. The best-fit parameters for the sterile neutrino with decay model from this study are Δm_{41}^{2}=6.7_{-2.5}^{+3.9} eV^{2}, sin^{2}2θ_{24}=0.33_{-0.17}^{+0.20}, and g^{2}=2.5π±1.5π, where g is the decay-mediating coupling. The preferred regions of the 3+1+decay model from short-baseline oscillation searches are excluded at 90% C.L.