2017/02/28 by Brando Bellazzini, Alberto Mariotti, Diego Redigolo +2 · 1 citation
Physics and Astronomy · #hep-ph #hep-ex #hep-th
paper · pdf · doi:10.1103/physrevlett.119.141804
published as Phys. Rev. Lett. 119, 141804 (2017) · 7 pages, 2 figures. v2: typos fixed, appendix added. v3: R-axion as motivation for ALP phenomenological studies made explicit, minor clarifications. Accepted for publication on PRL
arxiv created 2017/09/27 · arxiv updated 2017/10/11
We study the effective theory of a generic class of hidden sectors where supersymmetry is broken together with an approximate R-symmetry at low energy. The light spectrum contains the gravitino and the pseudo-Nambu-Goldstone boson of the R-symmetry, the R-axion. We derive new model-independent constraints on the R-axion decay constant for R-axion masses ranging from GeV to TeV, which are of relevance for hadron colliders, lepton colliders and B-factories. The current bounds allow for the exciting possibility that the first sign of SUSY will be the R-axion. We point out its most distinctive signals, providing a new experimental handle on the properties of the hidden sector and a solid motivation for searches of axion-like particles.