Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the trace anomaly for Weyl fermions   This note is a comment on some recent papers that have raised a controversy
about the existence of the odd-parity trace anomaly in a four-dimensional
theory of Weyl fermions. Without going into too technical details we explain
why the methods employed in those papers cannot detect it.

14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin