Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurements of B meson decay rates and CP violation asymmetries   Hadrons containing b-quarks represent a great opportunity to investigate the
flavor sector of the Standard Model (SM) and to look for New Physics effects
(NP). In this report we review the most up-to-date results on b-hadron decay
rates and CP violating asymmetries: among other results, we report Branching
Ratio (BR) and CP Violation (CPV) of B0, B0s and Lambda0b decay modes into
pairs of charmless charged hadrons (pions, kaons and protons), the first search
for CPV in B0s to phiphi decays and the first observation of bs to K0starK0star
decay. Two new results from the CDF collaboration are reported: the first
evidence of B0s to pipi decay and the world's best measurement of BR (B0 to
KK).

27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci