Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spherical Black Holes cannot Support Scalar Hair   The static spherically symmetric ``black hole solution" of the Einstein -
conformally invariant massless scalar field equations known as the BBMB (
Bocharova, , Bronikov, Melinkov, Bekenstein) black hole is critically examined.
It is shown that the stress energy tensor is ill-defined at the horizon, and
that its evaluation through suitable regularization yields ambiguous
  results. Consequently, the configuration fails to represent a genuine black
hole solution. With the removal of this solution as a counterexample to the no
hair conjecture, we argue that the following appears to be true: Spherical
black holes cannot carry any kind of classical scalar hair.

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The categories of this paper are: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: cs
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: math
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The categories of this paper are: q-fin
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The categories of this paper are: quant-ph