Multiloop calculations in HQET - INSPIRE

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Multiloop calculations in HQET

A.G. Grozin
(
- Novosibirsk, IYF
)

Nov, 2002

3 pages

Part of Advanced computing and analysis techniques in physics research. Proceedings, 8th International Workshop, ACAT 2002, Moscow, Russia, June 24-28, 2002

Published in:

Nucl.Instrum.Meth.A 502 (2003) 610-612

Contribution to:

- ACAT 02

e-Print:

hep-ph/0211328 [hep-ph]

DOI:

10.1016/S0168-9002(03)00519-9

View in:

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Abstract:

Recently, algorithms for calculation of 3-loop propagator diagrams in HQET and on-shell QCD with a heavy quark have been constructed and implemented. These algorithms (based on integration by parts recurrence relations) reduce an arbitrary diagram to a combination of a finite number of basis integrals. Here I discuss various ways to calculate non-trivial bases integrals, either exactly or as expansions in epsilon. Some integrals of these two classes are related to each other by inversion, which provides a useful cross-check.

Note:

Talk at ACAT'2002 (Moscow)

talk: Moscow 2002/06/24
HQET model
quantum chromodynamics
quark: massive
Feynman graph: higher-order
massless
epsilon expansion
mathematical methods

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