Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental estimates of the photon background in a potential
  light-by-light scattering study   High power short pulse lasers provide a promising route to study the strong
field effects of the quantum vacuum, for example by direct photon-photon
scattering in the all-optical regime. Theoretical predictions based on
realistic laser parameters achievable today or in the near future predict
scattering of a few photons with colliding Petawatt laser pulses, requiring
single photon sensitive detection schemes and very good spatio-temporal
filtering and background suppression. In this article, we present experimental
investigations of this photon background by employing only a single high power
laser pulse tightly focused in residual gas of a vacuum chamber. The focal
region was imaged onto a single-photon sensitive, time gated camera. As no
detectable quantum vacuum signature was expected in our case, the setup allowed
for characterization and first mitigation of background contributions. For the
setup employed, scattering off surfaces of imperfect optics dominated below
residual gas pressures of $1\times 10^{-4}$ mbar. Extrapolation of the findings
to intensities relevant for photon-photon scattering studies is discussed.

16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph