Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precise measurement of the total cross section and the Coulomb
  scattering at the LHC   A precise measurement of the total cross section and the coulomb scattering
at the LHC requires the observation of elastically scatteredparticles at
extremely small angles (14 microrad, -t < 0.01 GeV**2 for the first case; 3
microrad, -t<0.0006 GeV**2 for the second one). In this paper a very high-beta
insertion optics is presented. A feasibility study, including the acceptance of
the detectors, for an experiment to be installed in IR1 or IR5, is also
presented.

29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci