Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Lattice Computation of the First Moment of the Kaon's Distribution
  Amplitude   We present a lattice computation of the first moment of the kaon's
leading-twist distribution amplitude. The results were computed using ensembles
with 2+1 dynamical flavours with the domain wall fermion action and Iwasaki
gauge action from the RBC and UKQCD joint dataset. The first moment is non-zero
because of SU(3)-breaking effects, and we find that we are able to measure
these effects very clearly. We observe the expected chiral behaviour and
finally obtain <\xi>(2GeV) = 3/5*a_K^1(2GeV) = 0.032(3), which agrees very well
with results obtained using sum-rules, but with a significantly smaller error.

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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: cmp-lg
2
The categories of this paper are: math
19
The categories of this paper are: eess
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
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The categories of this paper are: nlin
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas