A Lower Bound on Neutrino Mass And Its Implication on the Z-Burst Scenario | Zendy

Kwang-Chang Lai | Zendy; Pisin Chen | Zendy

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A Lower Bound on Neutrino Mass And Its Implication on the Z-Burst Scenario

Author(s) -

Kwang-Chang Lai,

Pisin Chen

Publication year - 2006

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/878008

Subject(s) - neutrino , physics , upper and lower bounds , astrophysics , cosmic ray , flux (metallurgy) , cosmic cancer database , limit (mathematics) , particle physics , materials science , mathematics , metallurgy , mathematical analysis

We show that the cascade limit on ultra high energy cosmic neutrino (UHEC/nu) 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 the data from HiRes and AGASA, the obtained neutrino mass lower bound violates its existing cosmological upper bound. We conclude that the Z-burst cannot be the dominant source for the observed super-GZK UHECR events. This is consistent with the recent ANITA-lite data

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