Speaker
Marco Rossi
(CS)
Description
We study the first sub-leading correction O(lns^0) to the cusp (minimal) anomalous dimension in the high spin expansion of finite twist operators in N=4 SYM theory. This approximation is governed by a linear integral equation derived from Bethe Ansatz equations describing the 'asymptotic' spectrum of the dilatation operator. We emphasise how easily the weak coupling expansion can be obtained and then we pay particular attention to the strong coupling regime, showing agreement and predictions in comparison with the string expansion. Finally, speculations on the 'universal' part (upon subtracting the collinear anomalous dimension) are brought forward.
Primary author
Marco Rossi
(CS)
Co-authors
Davide Fioravanti
(BO)
Paolo Grinza
(Spagna)
