Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite time effects in single and double Compton scattering   The process of Compton scattering by a free electron with subsequent
reemission of one or two photons is considered in the assumption of finite
interaction time. The corresponding cross sections are obtained in the
framework of relativistic quantum electrodynamics using a modified form of
fermion propagator with complex transmitted momentum. It is shown that finite
time effects can be observable at sufficiently low energies of scattered
photons. The proposed method also regularizes arising infrared divergence in
the cross section of the double Compton effect. Possible experimental
verification of considered theoretical approach is discussed.

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The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
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The categories of this paper are: nlin
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
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The categories of this paper are: stat
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
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The categories of this paper are: comp-gas
18
The categories of this paper are: econ