Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermionic Bound States and Pseudoscalar Exchange   We discuss the possibility that fermions bind due to Higgs or pseudoscalar
exchange. It is reasonable to believe on qualitative grounds that this can
occur for fermions with a mass larger than 800-900 GeV. An exchange of a
pseudoscalar boson leads in the non-relativistic limit to an unacceptable
potential which behaves like 1/r^3 at the origin. We show that this singular
behaviour is smeared out when relativistic effects are included.

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The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
2
The categories of this paper are: math
9
The categories of this paper are: nlin
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The categories of this paper are: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: q-alg
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The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
33
The categories of this paper are: plasm-ph