Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A short look at epsilon'/epsilon   We analyze the theoretical implications of the new KTeV measurement of direct
CP-violation in K->pi pi decays. The result is found consistent with the
Standard Model for low values of the strange quark mass m_s. If the hadronic
parameters B_6^{(1/2)} and B_8^{(3/2)} satisfy 2 B_6^{(1/2)} - B_8^{(3/2)} < 2,
as suggested by lattice and 1/N_c calculations, we find an upper bound of 110
MeV for m_s (2 GeV)$. We parametrize potential new physics contributions to
\epsilon'/\epsilon and illustrate their correlation with upper bounds on m_s.
Finally we discuss a non-perturbative mechanism, which is not contained in the
existing calculations of B_6^{(1/2)}. This mechanism enhances B_6^{(1/2)} and
thereby leads to a better understanding of the Delta I=1/2 rule and the high
measured value of Re (\epsilon^\prime/\epsilon)

29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: plasm-ph