Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hadron Spectrum with Wilson fermions   We present results of a high statistics study of the quenched spectrum using
Wilson fermions at $\beta=6.0$ on $32^3 \times 64$ lattices. We calculate the
masses of mesons and baryons composed of both degenerate and non-degenerate
quarks. Using non-degenerate quark combinations allows us to study baryon mass
splittings in detail. We find significant deviations from the lowest order
chiral expansion, deviations that are consistent with the expectations of
quenched chiral perturbation theory. We find that there is a $\sim 20%$
systematic error in the extracted value of $m_s$, depending on the meson mass
ratio used to set its value. Using the largest estimate of $m_s$ we find that
the extrapolated octet mass-splittings are in agreement with the experimental
values, as is $M_\Delta - M_N$, while the decuplet splittings are 30% smaller
than experiment. Combining our results with data from the GF11 collaboration we
find considerable ambiguity in the extrapolation to the continuum limit. Our
preferred values are $M_N / M_\rho = 1.38(7)$ and $M_\Delta / M_\rho =
1.73(10)$, suggesting that the quenched approximation is good to only $\sim
10-15%$. We also analyze the $O(ma)$ discretization errors in heavy quark
masses.

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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
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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: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: math