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T: Fachverband Teilchenphysik

T 12: QCD (Theorie) 2

T 12.8: Vortrag

Dienstag, 5. März 2013, 18:30–18:45, WIL-A120

New heavy flavor contributions to DIS at the 3-loop order: different masses and nested topologies — Jakob Ablinger², Johannes Blümlein¹, Carsten Schneider², and •Fabian Wißbrock¹ — ¹DESY — ²RISC - JKU LINZ

We present recent results on the heavy flavor Wilson coefficients of the deep-inelastic structure function F₂ stemming from diagrams which contain both charm- and bottom-quarks. Starting at 3-loop order these contributions cannot be incorporated into the variable flavor number scheme (VFSN). We also present new results on the computation of diagrams of more advanced topologies (knotted ladder, Benz, and others) which have been obtained via the method of hyperlogarithms. They require the use of extensions to the basic formalism leading to the more general class of generalized hyperlogarithms, resp. the associated nested sums. Both the x- and Mellin N-space representations are discussed.