Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Even- and Odd-Parity Charmed Meson Masses in Heavy Hadron Chiral
  Perturbation Theory   We derive mass formulae for the ground state, J^P = 0^- and 1^-, and first
excited even-parity, J^P = 0^+ and 1^+, charmed mesons including one loop
chiral corrections and O(1/m_c) counterterms in heavy hadron chiral
perturbation theory. We show that including these counterterms is critical for
fitting the current data. We find that certain parameter relations in the
parity doubling model are not renormalized at one loop, providing a natural
explanation for the equality of the hyperfine splittings of ground state and
excited doublets.

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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: alg-geom
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The categories of this paper are: math
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The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: cs
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The categories of this paper are: chem-ph
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The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: stat
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The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int