Cancellation of divergences up to three loops in exceptional field theory

Guillaume Bossard (1) , Axel Kleinschmidt

1 CPHT - Centre de Physique Théorique [Palaiseau]

We consider the tetrahedral three-loop diagram in E d exceptional field theory evaluated as a scalar diagram for four external gravitons. At lowest order in momenta, this diagram contributes to the ∇ 6 R 4 term in the low-energy effective action for M-theory. We evaluate explicitly the sums over the discrete exceptional field theory loop momenta that become sums over 1/2-BPS states in the compact exceptional space. These sums can be rewritten as Eisenstein series that solve the homogeneous differential equations that supersymmetry implies for the ∇ 6 R 4 coupling. We also show how our results, even though sums over 1/2-BPS states, are consistent with expected 1/4-BPS contributions to the couplings.

Domaines: Physique des Hautes Energies - Théorie [hep-th]

Guillaume Bossard, Axel Kleinschmidt. Cancellation of divergences up to three loops in exceptional field theory. Journal of High Energy Physics, 2018, 2018 (3), ⟨10.1007/JHEP03(2018)100⟩. ⟨hal-02323893⟩