225 research outputs found
Renormalization of HQET at Three Loops
Three-loop propagator diagrams in HQET can be reduced, using integration by
parts, to 8 basis integrals: 5 trivial ones, two expressible via 3F2, and one
only known up to \epsilon^0. Calculation of the heavy-quark propagator in HQET
is considerably simplified by the non-abelian exponentiation theorem.Comment: Talk at the QCD workshop, Martina Franca, 17-20 June, to be published
in the Proceedings; LaTeX2e, aipproc document class (included), 7 pages, 7
eps figures (included
Heavy quark form factors in the large limit
Heavy quark form factors are calculated at to all
orders in at the first order in . The
terms in the recent results [arXiv:1611.07535] for the vector form factors are
confirmed, and terms for higher are predicted.Comment: v2: the section on inversion relations extended; v3: 3 refs added,
discussion of the hypergeometric function expansion extended; v4: eq. (22)
and fig. 5 correcte
- …