Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible Test of the GUT Relation between $M_1$ and $M_2$ in
  Electron-Photon Scattering   We investigate associated production of selectrons and the lightest
neutralino (LSP) in the process e^- + gamma --> neutralino_1 + selectron_{L/R}
with the selectron subsequently decaying into an electron and the LSP. Total
cross sections and various polarization asymmetries are calculated for photons
produced by Compton backscattering of a polarized laser beam at an $e^+e^-$
linear collider with CMS energy $\sqrt{s_{ee}}=500$ GeV and with polarized
beams. The total cross section and in particular the polarization asymmetries
show a characteristic dependence on the gaugino mass parameter $M_1$. Therefore
this process is suitable for testing the GUT relation
$M_1=M_2\cdot{5/3}\tan^2\theta_W $.

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The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
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The categories of this paper are: eess
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The categories of this paper are: atom-ph