利用IceCube起始径迹事件表征天体物理弥散中微子流
高能天体物理现象
2024-07-04 v1 天体物理仪器与方法
摘要
本文利用IceCube在2011年至2022年（10.3年）期间收集的数据，对弥散天体物理中微子谱进行了测量。我们开发了新颖的探测技术，用于搜索由μ中微子发生带电流相互作用所产生的、顶点位于探测器内部且径迹出射的事件。搜索这些起始径迹事件使我们不仅能更有效地剔除大气μ子，还能剔除南天的大气中微子背景，从而为低于100 TeV的天体物理中微子天空打开了新的窗口。事件选择采用动态起始径迹否决和机器学习算法构建。我们利用这些数据将天体物理弥散流测量为单幂律流（SPL），最佳拟合谱指数为，每味归一化因子为（在100 TeV处）。在SPL假设下，该数据集的敏感能量范围为3–550 TeV。该数据还用于测量分段幂律下的流，但我们未发现低能截断的任何证据。
引用
@article{arxiv.2402.18026,
title = {Characterization of the Astrophysical Diffuse Neutrino Flux using Starting Track Events in IceCube},
author = {R. Abbasi and M. Ackermann and J. Adams and S. K. Agarwalla and J. A. Aguilar and M. Ahlers and J. M. Alameddine and N. M. Amin and K. Andeen and G. Anton and C. Argüelles and Y. Ashida and S. Athanasiadou and L. Ausborm and S. N. Axani and X. Bai and A. Balagopal V. and M. Baricevic and S. W. Barwick and S. Bash and V. Basu and R. Bay and J. J. Beatty and J. Becker Tjus and J. Beise and C. Bellenghi and C. Benning and S. BenZvi and D. Berley and E. Bernardini and D. Z. Besson and E. Blaufuss and S. Blot and F. Bontempo and J. Y. Book and C. Boscolo Meneguolo and S. Böser and O. Botner and J. Böttcher and J. Braun and B. Brinson and J. Brostean-Kaiser and L. Brusa and R. T. Burley and R. S. Busse and D. Butterfield and M. A. Campana and I. Caracas and K. Carloni and J. Carpio and S. Chattopadhyay and N. Chau and Z. Chen and D. Chirkin and S. Choi and B. A. Clark and A. Coleman and G. H. Collin and A. Connolly and J. M. Conrad and P. Coppin and R. Corley and P. Correa and D. F. Cowen and P. Dave and C. De Clercq and J. J. DeLaunay and D. Delgado and S. Deng and K. Deoskar and A. Desai and P. Desiati and K. D. de Vries and G. de Wasseige and T. DeYoung and A. Diaz and J. C. Díaz-Vélez and M. Dittmer and A. Domi and L. Draper and H. Dujmovic and K. Dutta and M. A. DuVernois and T. Ehrhardt and L. Eidenschink and A. Eimer and P. Eller and E. Ellinger and S. El Mentawi and D. Elsässer and R. Engel and H. Erpenbeck and J. Evans and P. A. Evenson and K. L. Fan and K. Fang and K. Farrag and A. R. Fazely and A. Fedynitch and N. Feigl and S. Fiedlschuster and C. Finley and L. Fischer and D. Fox and A. Franckowiak and P. Fürst and J. Gallagher and E. Ganster and A. Garcia and E. Genton and L. Gerhardt and A. Ghadimi and C. Girard-Carillo and C. Glaser and T. Glüsenkamp and J. G. Gonzalez and S. Goswami and A. Granados and D. Grant and S. J. Gray and O. Gries and S. Griffin and S. Griswold and K. M. Groth and C. Günther and P. Gutjahr and C. Ha and C. Haack and A. 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journal= {arXiv preprint arXiv:2402.18026},
year = {2024}
}
备注
27 pages, 28 figures