Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Remarks on the effect of bound states and threshold in g-2   Recently, the contribution of positronium bound states to the electron
anomalous magnetic moment was computed in Refs.[1,2]. It was argued there that
this O(alpha^5) contribution is missed if electron g-2 is calculated within
conventional perturbative QED and, as such, it must be added to the
perturbative five-loop result. We show that this conclusion is flawed and that
no additional contributions to g-2 are generated in QED beyond the perturbation
theory.

1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph