Sep 15 – 18, 2014
Dept. of Physics and Astronomy
Europe/Rome timezone

Two-loop cusp anomaly in ABJM at strong coupling

Sep 15, 2014, 2:10 PM
Aula Magna (Dept. of Physics and Astronomy)

Aula Magna

Dept. of Physics and Astronomy

A. Righi Building Via Irnerio 46, 40126 Bologna (Italy)


Mr Edoardo Vescovi (Humboldt University Berlin)


We compute the null cusp anomalous dimension of ABJM theory at strong coupling up to two-loop order. This is done by evaluating corrections to the corresponding superstring partition function, weighted by the AdS4xCP3 action in AdS light-cone gauge. We compare our result, where we use an anomalous shift in the AdS4 radius, with the cusp anomaly of N=4 SYM, and extract the two-loop contribution to the non-trivial integrable coupling h(λ) of ABJM theory. It coincides with the strong coupling expansion of the exact expression for h(λ) recently conjectured by Gromov and Sizov. Our work provides thus a non-trivial perturbative check for the latter, as well as evidence for two-loop UV-finiteness and quantum integrability of the Type IIA AdS4xCP3 superstring in this gauge. Based on arXiv:1407.4788.

Primary author

Mr Edoardo Vescovi (Humboldt University Berlin)


Mr Alexis Brès (École Normale Supérieure) Mr Lorenzo Bianchi (Humboldt University Berlin) Dr Marco S. Bianchi (Humboldt University Berlin) Dr Valentina Forini (Humboldt University Berlin)

Presentation materials

There are no materials yet.