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Neutrino Mass Lower-Bound?

  1. Jun 4, 2006 #1
    I was wondering if anyone could help clarify this problem I am having.

    Upon reading a section in a paper, I am a bit stuck as to how this value of the lower bound of the neutrino mass is reached here. I have highlighted the relevent part in the snapshot below:


    http://img487.imageshack.us/img487/3...inomass3fk.jpg


    Is there something missing from this passage, or am I just missing something blindingly obvious? I can't seem to understand how the two squared mass differences coupled with the assumption of hierarchy lead to the quoted value!

    in case you're curious, the paper is:

    http://arxiv.org/abs/astro-ph?papernum=0407207

    thank you for reading!
     
    Last edited by a moderator: Jun 4, 2006
  2. jcsd
  3. Jun 5, 2006 #2
    no worries, i've figured it out now.
     
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