Two-loop Massive Fermionic Operator Matrix Elements and Intial State Qed Corrections to E Two-loop Massive Fermionic Operator Matrix Elements

Moments of the 3 – loop corrections to the heavy flavor contribution to F 2 ( x , Q 2 ) for Q 2 ≫

We calculate moments of the O(α3s) heavy flavor contributions to the Wilson coefficients of the structure function F2(x,Q ) in the region Q ≫ m. The massive Wilson coefficients are obtained as convolutions of massive operator matrix elements (OMEs) and the known light flavor Wilson coefficients. The calculation of moments of the massive OMEs involves a first independent recalculation of moments...

Heavy Flavour Production in Deep–Inelastic Scattering - Two–Loop Massive Operator Matrix Elements and Beyond

We calculate the O(ε)–term of the two–loop massive operator matrix elements for twist 2–operators, which contribute to the heavy flavour Wilson coefficients in unpolarized deep–inelastic scattering in the asymptotic limit Q ≫ m. Our calculation was performed in Mellin space using Mellin– Barnes integrals and generalized hypergeometric functions. The O(ε)–term contributes in the renormalization ...

arXiv:0803.0273 [hep-ph] Two–Loop Massive Operator Matrix Elements for Unpolarized Heavy Flavor Production to O(ǫ)

The massive 3 - loop operator matrix elements with two masses and the generalized variable flavor number scheme ∗

Massive ghost theories with a line of defects

We study free massive fermionic ghosts, in the presence of an extended line of impurities, relying on the Lagrangian formalism. We propose two distinct defect interactions, respectively, of relevant and marginal nature. The corresponding scattering theories reveal the occurrence of resonances and instabilities in the former case and the presence of poles with imaginary residues in the latter. C...