Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An explanation of the "negative neutrino mass squared" anomaly in
  tritium $ \beta$-decay based on a theory of mass   A proposed solution of the anomalous behavior of the electron spectrum near
the endpoint of tritium $\beta$-decay is offered. It is based on a new theory
of mass in which mass becomes a dynamical variable, and the electron in the
tritium $\beta$-decay has a narrow mass distribution. The predicted Kurie plots
explain the main feature (``$m_{\nu}^2 < 0 $'') of this anomalous behavior.

29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex