Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Has a "$ppK^{-}$" Signal in p+p Reactions been Observed Yet?   Our answer to the question posed in the title is: probably no. In this work
we show that it is rather unlikely that the structure $X(2265)$ reported by the
DISTO collaboration corresponds to a kaonic nuclear bound state. The main
argumentation is based on the repetition of the DISTO analysis on the HADES
data sample, containing p+p reactions at 3.5 GeV. We further discuss many
aspects in connection with the $pK^{+}\Lambda$ final state and the
$\Lambda(1405)$-resonance. The results evidence possible problematics in the
interpretation of the DISTO data.

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The categories of this paper are: patt-sol
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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: hep-ex
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The categories of this paper are: physics
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: cond-mat
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The categories of this paper are: cs
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The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: plasm-ph