Contributions to heavy flavour transition matrix elements in the variable flavour number scheme are considered at 3-loop order. In particular a calculation of the diagrams with two equal masses that contribute to the massive operator matrix element Agg,Q(3) is performed. In the Mellin space result one finds finite nested binomial sums. In x-space these sums correspond to iterated integrals over an alphabet containing also square-root valued letters.
Nuclear and Particle Physics Proceedings
- Pub Date:
- January 2015
- deep-inelastic scattering;
- heavy quark;
- High Energy Physics - Phenomenology
- 4 pages, Contribution to the Proceedings of QCD '14, Montpellier, July 2014