Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transverse Spin Polarization of $\tau^-$ in ${\bar{B}}^0\rightarrow
  D^{+} \tau^- {\bar{\nu}}$ and Charged Higgs Boson   The spin of the $\tau$ lepton in the semiletonic process
${\bar{B}}^0\rightarrow D^{+} \tau^- {\bar{\nu}}$ can be polarized in the
direction which is normal to the reaction plane, if the charged Higgs boson
exists and its coupling to quarks has a complex phase. We calculate this
transverse polarization of the $\tau$ lepton by using the experimentally
measured $B$ to $D$ transition form factors.

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The categories of this paper are: hep-th
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The categories of this paper are: funct-an
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: physics
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The categories of this paper are: q-bio
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The categories of this paper are: nlin
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The categories of this paper are: chem-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys