TY - JOUR
T1 - Muon anomalous magnetic moment in a supersymmetric U(1)′ model
AU - Barger, Vernon
AU - Kao, Chung
AU - Langacker, Paul
AU - Lee, Hye Sung
N1 - Funding Information:
This research was supported in part by the US Department of Energy under Grants No. DE-FG02-95ER40896, No. DE-FG02-04ER41305, No. DE-FG02-03ER46040, and No. DOE-EY-76-02-3071, and in part by the Wisconsin Alumni Research Foundation.
PY - 2005/5/12
Y1 - 2005/5/12
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=18044388197&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=18044388197&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2005.03.042
DO - 10.1016/j.physletb.2005.03.042
M3 - Article
AN - SCOPUS:18044388197
SN - 0370-2693
VL - 614
SP - 67
EP - 77
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1-2
ER -