Collinear and Regge behavior of 2 -> 4 MHV amplitude in N = 4 super Yang-Mills theory

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We investigate the collinear and Regge behavior of the 2 -> 4 MHV amplitude in N = 4super Yang-Mills theory in the BFKL approach.

• The expression for the remainder function in the collinear kinematics proposed by Alday, Gaiotto, Maldacena, Sever and Vieira is analytically continued to the Mandelstam region.
• The result of the continuation in the Regge kinematics shows an agreement with the BFKL approach up to to five-loop level.
• We present the Regge theory interpretation of the obtained results and discuss some issues related to a possible non-multiplicative renormalization of the remainder function in the collinear limit.