Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence for Mikheyev-Smirnov-Wolfenstein effects in solar neutrino
  flavor transitions   We point out that the recent data from the Sudbury Neutrino Observatory,
together with other relevant measurements from solar and reactor neutrino
experiments, convincingly show that the flavor transitions of solar neutrinos
are affected by Mikheyev-Smirnov-Wolfenstein (MSW) effects. More precisely, one
can safely reject the null hypothesis of no MSW interaction energy in matter,
despite the fact that the interaction amplitude (formally treated as a free
parameter) is still weakly constrained by the current phenomenology. Such a
constraint can be improved, however, by future data from the KamLAND
experiment. In the standard MSW case, we also perform an updated analysis of
two-family active oscillations of solar and reactor neutrinos.

11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph