| Title: |
Exploration of mass splitting and muon/tau mixing parameters for an eV-scale sterile neutrino with IceCube |
| Authors: |
Collaboration, IceCube; Abbasi, R; Ackermann, M; Adams, J; Agarwalla, SK; Aguilar, JA; Ahlers, M; Alameddine, JM; Amin, NM; Andeen, K; Argüelles, C; Ashida, Y; Athanasiadou, S; Ausborm, L; Axani, SN; Bai, X; Balagopal, A; Baricevic, M; Barwick, SW; Bash, S; Basu, V; Bay, R; Beatty, JJ; Tjus, J Becker; Beise, J; Bellenghi, C; Benning, C; BenZvi, S; Berley, D; Bernardini, E; Besson, DZ; Blaufuss, E; Bloom, L; Blot, S; Bontempo, F; Motzkin, JY Book; Meneguolo, C Boscolo; Böser, S; Botner, O; Böttcher, J; Braun, J; Brinson, B; Brostean-Kaiser, J; Brusa, L; Burley, RT; Butterfield, D; Campana, MA; Caracas, I; Carloni, K; Carpio, J; Chattopadhyay, S; Chau, N; Chen, Z; Chirkin, D; Choi, S; Clark, BA; Coleman, A; Collin, GH; Connolly, A; Conrad, JM; Coppin, P; Corley, R; Correa, P; Cowen, DF; Dave, P; De Clercq, C; DeLaunay, JJ; Delgado, D; Deng, S; Desai, A; Desiati, P; de Vries, KD; de Wasseige, G; DeYoung, T; Diaz, A; Díaz-Vélez, JC; Dierichs, P; Dittmer, M; Domi, A; Draper, L; Dujmovic, H; Dutta, K; DuVernois, MA; Ehrhardt, T; Eidenschink, L; Eimer, A; Eller, P; Ellinger, E; Mentawi, S El; Elsässer, D; Engel, R; Erpenbeck, H; Evans, J; Evenson, PA; Fan, KL; Fang, K; Farrag, K; Fazely, AR; Fedynitch, A; Feigl, N |
| Source: |
Physics Letters B, vol 858 |
| Publisher Information: |
eScholarship, University of California |
| Publication Year: |
2024 |
| Collection: |
University of California: eScholarship |
| Subject Terms: |
5106 Nuclear and Plasma Physics (for-2020); 5107 Particle and High Energy Physics (for-2020); 51 Physical Sciences (for-2020); Atmospheric neutrino IceCube TeV oscillation sterile; 0105 Mathematical Physics (for); 0201 Astronomical and Space Sciences (for); 0202 Atomic; Molecular; Nuclear; Particle and Plasma Physics (for); Nuclear & Particles Physics (science-metrix); 49 Mathematical sciences (for-2020) |
| Description: |
We present the first three-parameter fit to a 3+1 sterile neutrino model using 7.634 years of data from the IceCube Neutrino Observatory on ν μ + ν ‾ μ charged-current interactions in the energy range 500–9976 GeV. Our analysis is sensitive to the mass-squared splitting between the heaviest and lightest mass state ( Δ m 41 2 ), the mixing matrix element connecting muon flavor to the fourth mass state ( | U μ 4 | 2 ), and the element connecting tau flavor to the fourth mass state ( | U τ 4 | 2 ). Predicted propagation effects in matter enhance the signature through a resonance as atmospheric neutrinos from the Northern Hemisphere traverse the Earth to the IceCube detector at the South Pole. The remaining sterile neutrino matrix elements are left fixed, with | U e 4 | 2 = 0 and δ 14 = 0 , as they have a negligible effect, and δ 24 = π is set to give the most conservative limits. The result is consistent with the no-sterile neutrino hypothesis with a probability of 4.3%. Profiling the likelihood of each parameter yields the 90% confidence levels: 2.4 eV 2 < Δ m 41 2 < 9.6 eV 2 , 0.0081 < | U μ 4 | 2 < 0.10 , and | U τ 4 | 2 < 0.035 , which narrows the allowed parameter-space for | U τ 4 | 2 . However, the primary result of this analysis is the first map of the 3+1 parameter space exploring the interdependence of Δ m 41 2 , | U μ 4 | 2 , and | U τ 4 | 2 . |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
unknown |
| Relation: |
qt5kj0z8p0; https://escholarship.org/uc/item/5kj0z8p0; https://escholarship.org/content/qt5kj0z8p0/qt5kj0z8p0.pdf |
| DOI: |
10.1016/j.physletb.2024.139077 |
| Availability: |
https://escholarship.org/uc/item/5kj0z8p0; https://escholarship.org/content/qt5kj0z8p0/qt5kj0z8p0.pdf; https://doi.org/10.1016/j.physletb.2024.139077 |
| Rights: |
CC-BY |
| Accession Number: |
edsbas.49380AD5 |
| Database: |
BASE |