TY - JOUR

T1 - Natural split mechanism for sfermions

T2 - N=2 supersymmetry in phenomenology

AU - Shimizu, Yasuhiro

AU - Yin, Wen

N1 - Funding Information:
W.Y. would like to thank Masahiro Yamaguchi for the continuing guidance and the encouragement during his Ph.D. This research is supported in part by the Ministry of Education, Culture, Sports, Science, and Technology of Japan.
Publisher Copyright:
© 2016 The Authors.

PY - 2016/3/10

Y1 - 2016/3/10

N2 - 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 σ 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.

AB - 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 σ 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.

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U2 - 10.1016/j.physletb.2016.01.012

DO - 10.1016/j.physletb.2016.01.012

M3 - Article

AN - SCOPUS:84955056823

VL - 754

SP - 118

EP - 124

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

ER -