A two-loop four-gluon helicity amplitude in QCD | Zendy

Zvi Bern | Zendy; Lance J. Dixon | Zendy; David A Kosower | Zendy

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A two-loop four-gluon helicity amplitude in QCD

Author(s) -

Zvi Bern,

Lance J. Dixon,

David A Kosower

Publication year - 2000

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2000/01/027

Subject(s) - physics , helicity , particle physics , quantum chromodynamics , gluon , quantum electrodynamics , amplitude , loop (graph theory) , quantum mechanics , mathematics , combinatorics

We present the two-loop pure gauge contribution to the gluon-gluon scatteringamplitude with maximal helicity violation. Our construction of the amplitudedoes not rely directly on Feynman diagrams, but instead uses its analyticproperties in 4 - 2 epsilon dimensions. We evaluate the loop integralsappearing in the amplitude through O(epsilon^0) in terms of polylogarithms.Comment: Latex, 27 pages, 12 figures; v2: normalizations corrected in (5.11), (A.6) and (A.7

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