Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible reduction of the total uncertainty on the W boson mass measured
  at LEP2   An alternative W mass estimator in e+e- -> WW -> qqqq events at LEP2 is
designed to optimize the balance between the statistical uncertainty and the
systematic uncertainty due to a possible Colour Reconnection effect. The
preliminary result for the total uncertainty on the W mass in this channel is
roughly 30 % lower then those obtained with the standard estimators, based on
the SKI implementation of Colour Reconnection. Also an indirect measurement of
the SKI Colour Reconnection model parameter kappa is inferred from the
difference between both W mass estimators.

9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph