Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reducing model dependence of spectator effects in inclusive decays of
  heavy baryons   The dependence of inclusive weak decay rates of heavy hadrons on light
spectator quarks is considered. The analysis of a previous work on relating the
effects in b baryons to those in charmed baryons is extended to explicit
evaluation of the matrix elements of certain four-quark operators over heavy
baryons. It is shown that the usually postulated color antisymmetry of these
matrix elements is significantly broken. The flavor-singlet shift of inclusive
decay rates of b baryons due to the spectator effects is shown to be strongly
suppressed in the leading-log approximation. Combined with the results for the
flavor non-singlet splittings, this observation allows to argue, in a less
model-dependent way, than before, that within the present understanding of the
spectator effects it is highly unlikely that the lifetimes of the Lambda_b and
the B_d can be split by more than 10%.

11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg