Details

Autor(en) / Beteiligte

• Bern, Zvi
• Davies, Scott
• Dennen, Tristan
• Smirnov, Alexander V
• Smirnov, Vladimir A

Titel

Ultraviolet properties of N=4 supergravity at four loops

Ist Teil von

• Physical review letters, 2013-12, Vol.111 (23), p.231302-231302, Article 231302

Ort / Verlag

United States

Erscheinungsjahr

2013

Quelle

PROLA

Beschreibungen/Notizen

• We demonstrate that pure N=4 supergravity is ultraviolet divergent at four loops. The form of the divergence suggests that it is due to the rigid U(1) duality-symmetry anomaly of the theory. This is the first known example of an ultraviolet divergence in a pure ungauged supergravity theory in four dimensions. We use the duality between color and kinematics to construct the integrand of the four-loop four-point amplitude, whose ultraviolet divergence is then extracted by standard integration techniques.