solar neutrino problem

[wolram]

can anyone tell me if the, "solar neutrino problem", has been
solved, i ask because, i found a April 2004 paper that "solves"
the problem by linking to Planck scale foams aka LQG.
the thread is "quantum gravity planck scales" in S and GR.

http://arxiv.org/abs/hep-ph/0404014

[swansont]

I don't know if it fully solved the problem, but the Sudbury Neutrino Observatory (SNO) confirmed neutrino oscillations in the last couple of years.

[chroot]

There is very strong evidence these days that neutrinos oscillate. I wouldn't go so far as to say it's a closed case, however.

- Warren

[oj]

There is still a lot of ongoing research into neutrino oscillations, the so called "neutrino factory". The solar neutrino problem is far from solved.

[ZapperZ]

can anyone tell me if the, "solar neutrino problem", has been
solved, i ask because, i found a April 2004 paper that "solves"
the problem by linking to Planck scale foams aka LQG.
the thread is "quantum gravity planck scales" in S and GR.

http://arxiv.org/abs/hep-ph/0404014

http://www.nature.com/nsu/030120/030120-4.html

http://www.nature.com/nsu/010621/010621-5.html

Zz.

[wolram]

thankyou all, i can see that the therory in the paper i pointed to
may be worthy of consideration.

[Nereid]

If by 'solar neutrino problem' you mean 'why do the classic solar neutrino detectors find only ~65% of the neutrinos predicted from solar models?', then the problem has been solved, in the sense that the solar models have been found to be sound, and the 'deficit' of neutrinos laid at the door of neutrino oscillations. In this sense, it's no longer a 'solar' neutrino problem, rather a 'neutrino' problem.

[wolram]

If by 'solar neutrino problem' you mean 'why do the classic solar neutrino detectors find only ~65% of the neutrinos predicted from solar models?', then the problem has been solved, in the sense that the solar models have been found to be sound, and the 'deficit' of neutrinos laid at the door of neutrino oscillations. In this sense, it's no longer a 'solar' neutrino problem, rather a 'neutrino' problem.
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i understand better now, the neutrino is a schizophrenic particle
that can change character every few hundred miles. but what
causes these changes?

[Nereid]

Excellent question!

In one way, the answer is very simple: at least one flavour has non-zero mass. However, this just pushes the question back - why does it have non-zero mass (or, why don't the other flavours also have non-zero mass)? Also, what is that mass? And, will the Higgs help us understand neutrinos better? Do we need a SUSY theory??

[meteor]

I once read an article of Baez that said that the key was in a matrix called the Maki-Nakagawa-Sakata matrix. I even remember that he described that matrix like "misterious"

[kurious]

Why don't muon neutrinos oscillate with electron neutrinos?

[Zefram]

Neutrino Oscillations for Dummies (http://arxiv.org/pdf/physics/0303116).