Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dark Matter Annihilation Can Produce a Detectable Antihelium Flux
  through $\bar{\Lambda}_b$ Decays   Recent observations by the Alpha Magnetic Spectrometer (AMS-02) have
tentatively detected a handful of cosmic-ray antihelium events. Such events
have long been considered as smoking-gun evidence for new physics, because
astrophysical antihelium production is expected to be negligible. However, the
dark-matter-induced antihelium flux is also expected to fall below current
sensitivities, particularly in light of existing antiproton constraints. Here,
we demonstrate that a previously neglected standard model process -- the
production of antihelium through the displaced-vertex decay of
$\bar{\Lambda}_b$-baryons -- can significantly boost the dark matter induced
antihelium flux. This process can triple the standard prompt-production of
antihelium, and more importantly, entirely dominate the production of the
high-energy antihelium nuclei reported by AMS-02.

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The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-th
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
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The categories of this paper are: funct-an