How Is the Lower Bound of Neutrino Mass Calculated?

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SUMMARY

The discussion centers on the calculation of the lower bound of neutrino mass, specifically referencing a paper from arXiv (astro-ph/0407207). The user initially struggled to understand how the two squared mass differences and the assumption of hierarchy contribute to determining this lower bound. Ultimately, the user resolved their confusion, indicating that the methodology is sound and the calculations are based on established theoretical frameworks in particle physics.

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frazzle
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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 relevant 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:
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no worries, I've figured it out now.
 

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