Speaker
Description
We study how symmetries arising from extra dimensions can be used to derive constraints on string and supergravity effective actions. In Kaluza–Klein compactifications, some higher-dimensional symmetries are preserved, others are broken, and in special cases symmetry enhancements occur. While enhanced symmetries were shown to fix the higher-dimensional action before reduction [1,2], we show that broken higher-dimensional symmetries can also be realized after dimensional reduction as a global symmetry principle with constrained parameters, leading to non-trivial constraints on lower-dimensional couplings [3].
We implement this mechanism in pure gravity, half-maximal supergravity, and in the circle reduction of eleven-dimensional supergravity to Type IIA theory. As a concrete application, we use this principle to constrain quartic Ramond–Ramond couplings in Type IIA theory derived from the four-point $\zeta(3)\, \alpha'{}^3\, t_8 t_8 R^{(-) 4}$ interactions.
References:
[1] W.H.Baron, D.Marques and C.A.Nunez, Phys. Rev. Lett. 130 no.6,061601 (2023).
[2] W.H.Baron, D.Marques and C.A.Nunez, JHEP 12, 006 (2023).
[3] M.Ciafardini, D.Marques, C.A.Nunez, and A.Pereyra Grau, JHEP 02,072 (2025).