Evidence for a break in the spectrum of astrophysical neutrinos

被引：26

作者：

Anchordoqui, Luis A. ^{[1
,2
,3
]}

Block, Martin M. ^{[4
]}

Durand, Loyal ^{[5
,8
]}

Ha, Phuoc ^{[6
]}

Soriano, Jorge F. ^{[1
,2
]}

Weiler, Thomas J. ^{[7
]}

机构：

[1] CUNY, Dept Phys & Astron, Lehman Coll, Bronx, NY 10468 USA

[2] CUNY, Dept Phys, Grad Ctr, New York, NY 10016 USA

[3] Amer Museum Nat Hist, Dept Astrophys, New York, NY 10024 USA

[4] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

[5] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[6] Towson Univ, Dept Phys Astron & Geosci, Towson, MD 21252 USA

[7] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

[8] 415 Pearl Court, Aspen, CO 81611 USA

来源：

PHYSICAL REVIEW D | 2017年 / 95卷 / 08期

关键词：

COSMIC NEUTRINO; FLUX;

D O I：

10.1103/PhysRevD.95.083009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The announcement by the IceCube Collaboration of the observation of 53 astrophysical neutrino candidates in the energy range 0.03 less than or similar to E-nu/PeV less than or similar to 2 has been greeted with a great deal of justified excitement. Herein we provide fits of single and a broken power-law energy-spectra to these high-energy starting events (HESEs). By comparing our statistical results from fits to (background-free) shower HESE data with the spectral shape of muon neutrinos recently reported by the IceCube Collaboration, we show that there is (3 sigma) evidence for a break in the spectrum of astrophysical neutrinos. After that we use the fitted result to predict the rate of Glashow events (in the approximate to 6.3 PeV region) and double-bang tau neutrino events (in the PeV region) just at the threshold of IceCube detection.

引用

页数：17

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