Decay of high-energy astrophysical neutrinos

被引:188
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 Wisconsin, Dept Phys, Madison, WI 53706 USA
[3] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA
[4] KEK, Theory Grp, Tsukuba, Ibaraki 3050801, Japan
[5] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA
关键词
D O I
10.1103/PhysRevLett.90.181301
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Existing limits on the nonradiative decay of one neutrino to another plus a massless particle (e.g., a singlet Majoron) are very weak. The best limits on the lifetime to mass ratio come from solar neutrino observations and are tau/mgreater than or similar to10(-4) s/eV for the relevant mass eigenstate(s). For lifetimes even several orders of magnitude longer, high-energy neutrinos from distant astrophysical sources would decay. This would strongly alter the flavor ratios from the phi(nu e):phi(nu mu):phi(nu tau)=1:1:1 expected from oscillations alone and should be readily visible in the near future in detectors such as IceCube.
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页数:4
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