Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photon-photon scattering: a tutorial   Long-established results for the low-energy photon-photon scattering, gamma
gamma --> gamma gamma, have recently been questioned. We analyze that claim and
demonstrate that it is inconsistent with experience. We demonstrate that the
mistake originates from an erroneous manipulation of divergent integrals and
discuss the connection with another recent claim about the Higgs decay into two
photons. We show a simple way of correctly computing the low-energy gamma gamma
scattering.

35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
2
The categories of this paper are: math