Bellazzini Brando, Mariotti Alberto, Redigolo Diego, Sala Filippo, Serra Javi
Institut de Physique Théorique, Université Paris Saclay, CEA, CNRS, F-91191 Gif-sur-Yvette, France.
Dipartimento di Fisica e Astronomia, Universitá di Padova, Via Marzolo 8, I-35131 Padova, Italy.
Phys Rev Lett. 2017 Oct 6;119(14):141804. doi: 10.1103/PhysRevLett.119.141804. Epub 2017 Oct 5.
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 supersymmetry 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 axionlike particles.
我们研究了一类通用的隐藏区有效理论，其中超对称性在低能下与近似R-对称性一起被打破。轻子谱包含引力微子和R-对称性的赝南布-戈德斯通玻色子，即R-轴子。我们推导了R-轴子质量从GeV到TeV范围内R-轴子衰变常数的新的与模型无关的限制，这对强子对撞机、轻子对撞机和B工厂具有相关性。当前的限制允许超对称性的第一个迹象将是R-轴子这种令人兴奋的可能性。我们指出了它最独特的信号，为隐藏区的性质提供了一个新的实验线索，并为寻找类轴子粒子提供了坚实的动机。
