Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Is the stop mass below the top mass?   It is shown that a top mass of 174+/-17 GeV, as quoted recently by the CDF
Collaboration, constrains the mixing angle between the Higgs doublets in the
Minimal Supersymmmetric extension of the Standard Model (MSSM) to: 1.2<tan
beta<5.5 at the 90% C.L.. The most probable value corresponds to tan beta =
1.56; such a small value causes a large mixing in the stop sector and the
lightest stop is likely to be below the top mass. In this case the stop
production in pp_bar collisions would contribute to the top signature, thus
providing a possible explanation for the large effective tt_bar cross section
observed by CDF.

25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex