Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: About neutral mesons and particle oscillations in the light of
  field-theoretical prescriptions of Weinberg   By extending the well-known Weinberg's prescriptions on the diagonalization
of the mass term of the Lagrangian without increasing the total number of
entities, we get the following conclusions: the set of neutral $K$-mesons
consists of two elements, $K_{S}^{0}$ and $K_{L}^{0}$; the states $K^{0}$ and
$\bar{K}^{0}$ do not exist as physical objects (in the form of particles or
"particle mixtures"); the absence of the states $K^{0}$ and $\bar{K}^{0}$
destroys the grounds for introducing the notion of their oscillations, further
replicated as the neutrino oscillation concept. The conclusions concerning the
neutral $K$-mesons are also applicable to the neutral $D$-, $B$- and
$B_{s}$-mesons.

1
The categories of this paper are: cs
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc