54 citations · 65 across the 3 of their papers we have counts for
3 papers
hep-ph2008★ 10 cited
Semi-numerical power expansion of Feynman integrals
Volker Pilipp
I present an algorithm based on sector decomposition and Mellin-Barnes techniques to power expand Feynman integrals. The coefficients of this expansion are given in terms of finite…
hep-ph2007★ 54 cited
Hard spectator interactions in B to pi pi at order alpha_s^2
Volker Pilipp
I compute the hard spectator interaction amplitude in at NLO i.e. at O(α_s^2). This special part of the amplitude, whose LO starts at O(α_s), is defined in the framework o…
hep-ph2007★ 1 cited
Matching of lambda_B onto HQET
Volker Pilipp
The quantity 1/lambda_B, the inverse moment of the B-meson light-cone wave function, plays an important role in exclusive B-decays. I calculate the matching coefficient of lambda_B…