Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Leptoproduction of Heavy Quarks   There are presently two approaches to calculating heavy quark production for
the deeply inelastic scattering process in current literature. The conventional
fixed-flavor scheme focuses on the flavor creation mechanism and includes the
heavy quark only as a final state particle in the hard scattering cross
section; this has been computed to next-to-leading order--\alphas^2. The more
recently formulated variable-flavor scheme includes, in addition, the flavor
excitation process where the initial state partons of all flavors contribute
above their respective threshold, as commonly accepted for calculations of
other high energy processes; this was initially carried out to leading
order--\alphas^1. We first compare and contrast these existing calculations. As
expected from physical grounds, the next-to-leading-order fixed-flavor scheme
calculation yields good results near threshold, while the leading-order
variable-flavor scheme calculation works well for asymptotic Q^2. The quality
of the calculations in the intermediate region is dependent upon the x and Q^2
values chosen. An accurate self-consistent QCD calculation over the entire
range can be obtained by extending the variable-flavor scheme to
next-to-leading-order. Recent work to carry out this calculation is described.
Preliminary numerical results of this calculation are also presented for
comparison.

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The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
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The categories of this paper are: eess
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn