Measuring flavor ratios of high-energy astrophysical neutrinos

被引：210

作者：

Beacom, JF

Bell, NF

Hooper, D

Pakvasa, S

Weiler, TJ

机构：

[1] Fermilab Natl Accelerator Lab, NASA Fermilab Astrophys Ctr, Batavia, IL 60510 USA

[2] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA

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

[4] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA

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

来源：

PHYSICAL REVIEW D | 2003年 / 68卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.68.093005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss the prospects for next generation neutrino telescopes, such as IceCube, to measure the flavor ratios of high-energy astrophysical neutrinos. The expected flavor ratios at the sources are phi(nue):phi(numu):phi(nutau)=1:2:0, and neutrino oscillations quickly transform these to 1:1:1. The flavor ratios can be deduced from the relative rates of showers (nu(e) charged current, most nu(tau) charged current, and all flavors neutral current), muon tracks (nu(mu) charged current only), and tau lepton lollipops and double bangs (nu(tau) charged current only). The peak sensitivities for these interactions are at different neutrino energies, but the flavor ratios can be reliably connected by a reasonable measurement of the spectrum shape. Measurement of the astrophysical neutrino flavor ratios tests the assumed production mechanism and also provides a very long baseline test of a number of exotic scenarios, including neutrino decay, CPT violation, and small-deltam(2) oscillations to sterile neutrinos.

引用

页数：10

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