Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurements of sin2alpha/phi2 from B -> pipi, rhopi and rhorho modes   B meson decays involving b -> u transitions are sensitive to the unitarity
triangle angle alpha (or phi2). The BaBar and Belle experiments have studied
B-meson decays to pipi, rhopi and rhorho final states. It is possible to
combine these measurements to constrain alpha with a precision of O(10 degrees)
and a central value of approximately 100 degrees. These results are consistent
with Standard Model expectations.

15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: eess
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph