English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Planar gluon amplitudes in N=4 SYM are remarkably similar to expectationvalues of Wilson loops made of light-like segments. We argue that the lattercan be determined by making use of the conformal symmetry of the gauge theory,broken by cusp anomalies. We derive the corresponding anomalous conformal Wardidentities valid to all loops and show that they uniquely fix the form of thefinite part of a Wilson loop with n cusps (up to an additive constant) for n=4and n=5 and reduce the freedom in it to a function of conformal invariants forn>=6. We also present an explicit two-loop calculation for n=5. The resultconfirms the form predicted by the Ward identities and exactly matches thefinite part of the two-loop five-gluon planar MHV amplitude. This constitutesanother non-trivial test of the Wilson loop/gluon amplitude duality.

Conformal Ward identities for Wilson loops and a test of the duality with gluon amplitudes