Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized Klein-Nishina formula   The generalized Klein-Nishina formula for Compton scattering of charged
particles by a finite train of pulses is derived in the framework of quantum
electrodynamics. The formula also applies to classical Thomson scattering
provided that frequencies of generated radiation are smaller that the cut-off
frequency. The validity of the formula for incident pulses of different
durations is illustrated by numerical examples. The positions of the
well-resolved Compton peaks, with the clear labeling by integer orders, opens
up the possibility of the precise diagnostics of properties of relativistically
intense, short laser pulses. This includes their peak intensity, the
carrier-envelope phase, and their polarization properties.

2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con