Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Perspectives of $e^+e^-$ production in pp, pd and p Be reactions at SIS
  energies   We study dilepton production from pp, pd and p Be collisions from 1 - 5 GeV
including the $\pi^0$, $\eta$, $\omega$ and $\Delta$ Dalitz decays, direct
decays of vector mesons ($\rho$, $\omega$) as well as subthreshold $\rho$
production via baryonic resonances (e.g. $D_{13}(1520), P_{11}(1710)$). Our
calculations compare rather well with the pp and pd data from the DLS
Collaboration, however, overestimate slightly the 'old' p Be data from that
group. Futhermore, detailed predictions for differential dilepton spectra at
SIS energies are made with a high mass resolution that can be controlled
experimentally by the HADES Collaboration in near future.

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The categories of this paper are: cs
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The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
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The categories of this paper are: math
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph