Light-quark two-loop corrections to heavy-quark pair production in the gluon fusion channel

Bonciani R, Ferroglia A, Gehrmann T, von Manteuffel A, Studerus C (2013)
Journal of High Energy Physics 2013(12).

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We calculate the two-loop corrections to heavy-quark pair production in the gluon fusion channel which arise from diagrams involving a closed light-quark loop. The calculation is carried out by keeping the exact dependence on the heavy-quark mass. The analytic results are written in terms of logarithms, classical polylogarithms Li_n (n=2,3,4), and genuine multiple polylogarithms Li_{2,2}. The functional arguments are rational expressions of two independent external invariants and they are chosen in such a way that the functions are real in all the physical phase-space points. Through systematic changes in the functional basis, we obtain expansions of the results in both the production threshold and small mass limits.
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Bonciani R, Ferroglia A, Gehrmann T, von Manteuffel A, Studerus C. Light-quark two-loop corrections to heavy-quark pair production in the gluon fusion channel. Journal of High Energy Physics. 2013;2013(12).
Bonciani, R., Ferroglia, A., Gehrmann, T., von Manteuffel, A., & Studerus, C. (2013). Light-quark two-loop corrections to heavy-quark pair production in the gluon fusion channel. Journal of High Energy Physics, 2013(12).
Bonciani, R., Ferroglia, A., Gehrmann, T., von Manteuffel, A., and Studerus, C. (2013). Light-quark two-loop corrections to heavy-quark pair production in the gluon fusion channel. Journal of High Energy Physics 2013.
Bonciani, R., et al., 2013. Light-quark two-loop corrections to heavy-quark pair production in the gluon fusion channel. Journal of High Energy Physics, 2013(12).
R. Bonciani, et al., “Light-quark two-loop corrections to heavy-quark pair production in the gluon fusion channel”, Journal of High Energy Physics, vol. 2013, 2013.
Bonciani, R., Ferroglia, A., Gehrmann, T., von Manteuffel, A., Studerus, C.: Light-quark two-loop corrections to heavy-quark pair production in the gluon fusion channel. Journal of High Energy Physics. 2013, (2013).
Bonciani, R., Ferroglia, A., Gehrmann, T., von Manteuffel, Andreas, and Studerus, Cedric. “Light-quark two-loop corrections to heavy-quark pair production in the gluon fusion channel”. Journal of High Energy Physics 2013.12 (2013).
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