Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The effect of random matter density perturbations on the MSW solution to
  the solar neutrino problem   We consider the implications of solar matter density random noise upon
resonant neutrino conversion. The evolution equation describing MSW-like
conversion is derived in the framework of the Schr\"odinger approach. We study
quantitatively their effect upon both large and small mixing angle MSW
solutions to the solar neutrino problem. This is carried out both for the
active-active $\nu_e \ra \nu_{\mu,\tau}$ as well as active-sterile $\nu_e \ra
\nu_s$ conversion channels. We find that the small mixing MSW solution is much
more stable (especially in $\Delta m^2$) than the large mixing solution. The
possible existence of solar matter density noise at the few percent level could
be tested at future solar neutrino experiments, especially Borexino.

31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph