Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Can a mass inversion save solar neutrino oscillations from the Los
  Alamos neutrino?   In the light of the $\nu_\mu\to\nu_e$ neutrino oscillations which may have
been observed at the LSND experiment we explore the consequences of two
inverted mass schemes where solar neutrino oscillations occur between $\nu_e$
and $\nu_\tau$. The favored LSND value $\Delta m^2=6\,\eV^2$ leads to
$m_{\nu_e}\approx m_{\nu_\tau}\approx 2.5\,\eV$ and $m_{\nu_\mu}\approx0$ so
that cosmology can benefit from a recently proposed ``cold plus hot dark
matter'' structure formation scenario with two equal mass light neutrinos
(C$\nu^2$DM). Solar neutrino oscillations ($\nu_e\to\nu_\tau$) can occur with
one of the large mixing angle solutions so that a serious conflict with
$\beta\beta$ decay Majorana mass limits is avoided without invoking Dirac
masses. However, there is a problem with the SN~1987A signal because of
resonant $\anti\nu_e\leftrightarrow\anti\nu_\mu$ oscillations which are
expected to cause far higher $\anti\nu_e$ energies at the IMB and Kamiokande~II
detectors than have been observed. A small value $\Delta m^2=0.5\,\eV^2$ at
LSND, which allows for a relatively large $\nu_e$-$\nu_\mu$ mixing angle
without conflicting with the KARMEN and BNL-E776 experiments, would indicate
$m_{\nu_e}\approx m_{\nu_\tau}\approx 1.62\,\eV$ and
$m_{\nu_\mu}\approx1.77\,\eV$. This scheme of C$\nu^3$DM maintains, and even
may improve, the essential cosmological model implications for large-scale
structure, leaving no conflict with SN r-process nucleosynthesis. It may
improve the discordance between the SN~1987A neutrino spectra inferred from
Kamiokande~II and IMB.

17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex