Natural split mechanism for sfermions: N=2 supersymmetry in phenomenology

作者：Shimizu Yasuhiro; Yin Wen^*

来源：Physics Letters B, 2016, 754: 118-124.

DOI：10.1016/j.physletb.2016.01.012

We suggest a natural split mechanism for sfermions based on N = 2 supersymmetry (SUSY). N = 2 SUSY protects a sfermion in an N = 2 multiplet from gaining weight by SUSY breaking. Therefore, if partly N = 2 SUSY is effectively obtained, a split spectrum can be realized naturally. As an example of the natural split mechanism, we build a gauge-mediated SUSY breaking-like model assuming N = 2 SUSY is partly broken in an underlying theory. The model explains the Higgs boson mass and muon anomalous magnetic dipole moment within 1 sigma level with a splitting sfermion spectrum. The model has seven light sparticles described by three free parameters and predicts a new chiral multiplet, sb: the N = 2 partner of the N = 1 U(1)(Y) vector multiplet. The bini, the fermion component of the sb, weighs MeVs. We mention the experimental and cosmological aspects of the model.

• 出版日期2016-3-10