Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photo-Transmutation of Leptons   By photo-transmutation of leptons we mean photon-lepton reactions of the
following type: $\gamma l_\alpha \longrightarrow \gamma l_\beta$ with $l_\alpha
\neq l_\beta$, occurring as a consequence of the lepton mass matrix changing
its orientation (rotating) under changing scales. In this paper, we first
discuss these reactions in general terms, then proceed to the calculation of
their cross sections in two specific schemes, one within the framework of the
conventional Standard Model, the other being the so-called Dualized Standard
Model we ourselves advocate. Although the cross section obtained is generally
small the calculation reveals certain special circumstances where these
reactions may be accessible to experiment, for example with virtual photons in
LEP for $\gamma e \longrightarrow \gamma \tau$, and in BEPC for $\gamma e
\longrightarrow \gamma \mu$.

8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin