An R-4 non-renormalization theorem in N=4 super-gravity

作者：Tourkine Piotr^*; Vanhove Pierre

来源：Classical and Quantum Gravity, 2012, 29(11): 115006.

DOI：10.1088/0264-9381/29/11/115006

We consider the four-graviton amplitudes in CHL constructions providing four-dimensional N = 4 models with various numbers of vector multiplets. We show that in these models the two-loop amplitude has a prefactor of partial derivative R-2(4). This implies a non-renormalization theorem for the R-4 term, which forbids the appearance of a three-loop ultraviolet divergence in four dimensions in the four-graviton amplitude. We connect the special nature of the R-4 term to the U(1) anomaly of pure N = 4 super-gravity.

• 出版日期2012-6-7
• 单位中国地震局