Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: E2/M1 ratio from the Mainz $p(\vec \gamma, p)\pi^0$ data   We suggest that the error quoted in the Mainz determination of the E2/M1
ratio (at the resonance energy) should be enlarged. A term dropped in
expressions used by this group could be significant.

23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org