Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Isospin odd pi K scattering length   We make use of the chiral two-loop representation of the pi K scattering
amplitude [J. Bijnens, P. Dhonte and P. Talavera, JHEP 0405 (2004) 036] to
investigate the isospin odd scattering length at next-to-next-to-leading order
in the SU(3) expansion. This scattering length is protected against
contributions of m_s in the chiral expansion, in the sense that the corrections
to the current algebra result are of order M_pi^2. In view of the planned
lifetime measurement on pi K atoms at CERN it is important to understand the
size of these corrections.

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The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: q-alg
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol