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UID:382@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20140425T133000
DTEND;TZID=Europe/Berlin:20140425T143000
DTSTAMP:20140415T102753Z
URL:https://qft.physik.hu-berlin.de/next-seminars/250414/
SUMMARY:Vladimir Smirnov\, Moscow State University\, Moscow - Evaluating Fe
 ynman integrals by differential equations
DESCRIPTION:Evaluating Feynman integrals by differential equations\nA new s
 trategy to solve differential equations for Feynman integrals has been rec
 ently suggested. After a set of master integrals is found using the integr
 ation-by-parts method\, the crucial point of this strategy is to introduce
  a new basis where all master integrals are pure functions of uniform tran
 scendentality. This allows to cast the differential equations into a simpl
 e canonical form\, which can straightforwardly be integrated order by orde
 r in epsilon in dimensional regularization. This method was successfully a
 pplied to planar three-loop four-point massless on-shell integrals\, to on
 e of two types of planar families contributing to massive two-loop Bhabha 
 scattering in QED\, to so-called K4 diagram consisting of four external ve
 rtices which are connected with each other by six lines. This method can b
 e also applied to single-scale Feynman integrals.\n
CATEGORIES:Pizza Seminars
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