Authors: George Georgiou
Publish Date: 2015/08/26
Volume: 2015, Issue: 8, Pages: 128-
Abstract
In this work we employ the MHV technique to show that scattering amplitudes with any number of consecutive soft particles behave universally in the multisoft limit in which all particles go soft simultaneously After identifying the diagrams which give the leading contribution we give the general rules for writing down compact expressions for the multisoft factor of m gluons k of which have negative helicity We explicitly consider the cases where k = 1 and 2 In mathcalN=4 SYM the multisoft factors of 2 scalars or 2 fermions forming a singlet of SU4 Rsymmetry and m − 2 positive helicity gluons are derived The special case of the doublesoft limit gives an amplitude whose leading divergence is 1/δ2 and not 1/δ as in the case of 2 scalars or 2 fermions that do not form a singlet under SU4 The construction based on the analytic supervertices allows us to obtain simple expressions for the triplesoft limit of 1 scalar and 2 positive helicity fermions as well as for the quadrapolesoft limit of 4 positive helicity fermions in a singlet configurationThis article is published under an open access license Please check the Copyright Information section for details of this license and what reuse is permitted If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and reuse information please contact the Rights and Permissions team
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