Abstract
We show that the cascade limit on ultra high energy cosmic neutrino (UHECν) flux imposes a lower bound on the neutrino mass, provided that super-GZK events of ultra high energy cosmic rays (UHECRs) are produced from Z-bursts. Based on data from HiRes and AGASA, the lower bound obtained on neutrino mass violates its existing cosmological upper bound. We conclude that Z-bursts cannot be the dominant source for the observed super-GZK UHECR events. This is consistent with the recent ANITA-lite data.
| Original language | English |
|---|---|
| Pages (from-to) | 713-720 |
| Number of pages | 8 |
| Journal | Modern Physics Letters A |
| Volume | 21 |
| Issue number | 9 |
| DOIs | |
| State | Published - 21 03 2006 |
| Externally published | Yes |
Keywords
- Neutrino astronomy
- Ultra high energy neutrinos
- Z-burst