Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lifetime difference of $B_s$ mesons - Theory status   We give an update on the lifetime difference of $B_s$ mesons which accounts
for recent lattice bag parameter results, and obtain
$(\Delta\Gamma/\Gamma)_{B_s}=(9.3^{+3.4}_{-4.6})%$. We then review the current
theoretical uncertainties and conclude with a pessimistic perspective on
further improvements.

29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph