Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Resummation of Large QCD Corrections to photon photon to b anti-b   We study the resummation of large QCD radiative corrections up to the next to
leading logarithmic accuracy to the process photon photon to b anti-b; i.e., we
resum logarithms of the type alpha_s^p log^{2p}{m^2/s} and alpha_s^p
log^{2p-1}{m^2/s} (m is the quark mass). The only source of all the logarithms
to this accuracy is the off-shell Sudakov form factor included into the
triangle topologies of the one-loop box diagram. We prove that any other
configurations of diagrams to this accuracy, either cancel in subgroups or
develop a universal on-shell Sudakov exponent due to the final quark anti-quark
lines. We study the mechanism of cancellations between the different diagrams,
which leads to the simple resummed results. We show the cancellation explicitly
at three loops for the leading and at two loops for the next-to-leading
logarithms. We also point out the general mechanism responsible for it, and
discuss how it can be extended to higher orders.

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The categories of this paper are: cs
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: cmp-lg
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The categories of this paper are: cond-mat
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The categories of this paper are: math
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The categories of this paper are: physics
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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ex