Muon anomalous magnetic moment in a supersymmetric U(1)′ model

Vernon Barger, Chung Kao, Paul Langacker, Hye Sung Lee

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

We study the muon anomalous magnetic moment aμ=(g μ-2)/2 in a supersymmetric U(1)′ model. The neutralino sector has extra components from the superpartners of the U(1)′ gauge boson and the extra Higgs singlets that break the U(1)′ symmetry. The theoretical maximum bound on the lightest neutralino mass is much smaller than that of the Minimal Supersymmetric Standard Model (MSSM) because of the mixing pattern of the extra components. In a U(1)′ model where the U(1)′ symmetry is broken by a secluded sector (the S-model), tanβ is required to be ≲3 to have realistic electroweak symmetry breaking. These facts suggest that the aμ prediction may be meaningfully different from that of the MSSM. We evaluate and compare the muon anomalous magnetic moment in this model and the MSSM and discuss the constraints on tanβ and relevant soft breaking terms. There are regions of the parameter space that can explain the experimental deviation of aμ from the Standard Model calculation and yield an acceptable cold dark matter relic density without conflict with collider experimental constraints.

Original languageEnglish (US)
Pages (from-to)67-77
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume614
Issue number1-2
DOIs
StatePublished - May 12 2005

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'Muon anomalous magnetic moment in a supersymmetric U(1)′ model'. Together they form a unique fingerprint.

  • Cite this