Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Testing Time Reversal Invariance in Exclusive Semileptonic B Meson
  Decays   We demonstrate that polarization measurements in exclusive semileptonic B
decays are powerful tools for unraveling non-standard model sources of
T-violation. Measurements of the transverse polarization of the tau lepton in
the B to D tau nu and B to D* tau nu decays probe separately effective scalar
and pseudoscalar CP-violating four-Fermi interactions, whereas the D*
polarization in the B to D* l nu (l=e,mu) decay is sensitive to an effective
right-handed quark current interaction. Two T-odd polarization structures exist
involving the D* polarization and they can be isolated and studied separately.
An estimate of these T-odd effects is also given in the context of
supersymmetric theories.

24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas