Summing One-Loop Graphs at Multiparticle Threshold -- from Wolfram Library Archive

Title

Summing One-Loop Graphs at Multiparticle Threshold

Author

M.B. Voloshin

Journal / Anthology

Physical Review D

Year:

1993

Volume:

Issue:

Page range:

R357-R361

Description

It is shown that the technique recently suggested by Brown for summing the tree graphs at threshold can be extended to calculate the loop effects. An explicit result is derived for the sum of one-loop graphs for the amplitude of threshold production of n on-mass-shell particles by one virtual particle in the unbroken gamma phi4 theory. It is also found that the tree-level amplitude of production of n particles by two in-coming on-mass-shell particles vanishes at the threshold for n > 4.

Subject

Science > Physics > Quantum Physics

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