Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the determination of the relative sign of $a_1$ and $a_2$ from
  polarization measurements in $B^- \rightarrow \rho^- {D^*}^o$ decay   We point out that polarization measurements such as the longitudinal fraction
and the transverse left-right asymmetry in the Bauer-Stech-Wirbel (BSW) class
III processes involving two final vector mesons, $B^- \ra \rho^- {D^*}^o$ taken
as an example, are useful in determining the relative sign as well as the
relative magnitudes of the coefficients $a_1$ and $a_2$.

22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom