Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The DIS(chi) Scheme for Heavy Quark Production at Small x   In order to successfully describe DIS data, one must take heavy quark mass
effects into account. This is often achieved using so called variable flavour
number schemes, in which a parton distribution for the heavy quark species is
defined above a suitable matching scale. At small x, one must also potentially
include high energy corrections to this framework arising from the BFKL
equation. We outline the definition of a variable flavour scheme which allows
such corrections to be consistently implemented alongside a fixed order QCD
expansion. Results of a global fit using this scheme are presented. We also
discuss an extension of the resummation to NLL order.

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The categories of this paper are: nucl-th
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The categories of this paper are: physics
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The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
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The categories of this paper are: cs
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: econ
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The categories of this paper are: q-alg
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The categories of this paper are: q-bio
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The categories of this paper are: math
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The categories of this paper are: q-fin
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The categories of this paper are: hep-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom