Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Compton scattering from $^4$He at the TUNL HI$\gamma$S facility   Differential cross sections for elastic Compton scattering from $^4$He have
been measured with high statistical precision at the High Intensity
$\gamma$-ray Source at laboratory scattering angles of $55^\circ$, $90^\circ$,
and $125^\circ$ using a quasi-monoenergetic photon beam with a weighted mean
energy value of $81.3$ MeV. The results are compared to previous measurements
and similar fore-aft asymmetry in the angular distribution of the differential
cross sections is observed. This experimental work is expected to strongly
motivate the development of effective-field-theory calculations of Compton
scattering from $^4$He to fully interpret the data.

3
The categories of this paper are: physics
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th