TY - JOUR
T1 - Neutralino signatures of the singlet extended MSSM
AU - Barger, Vernon
AU - Langacker, Paul
AU - Shaughnessy, Gabe
N1 - Funding Information:
This work was supported in part by the US Department of Energy under grants Nos. DE-FG02-95ER40896 and DOE-EY-76-02-3071 and in part by the Wisconsin Alumni Research Foundation. We thank H.S. Lee for helpful discussions and M. McCaskey for helpful checks. V.B. thanks the Aspen Center for Physics for hospitality during the course of this work.
PY - 2007/1/25
Y1 - 2007/1/25
N2 - Extending the Higgs sector of the MSSM by the addition of a gauge singlet scalar field can remedy the μ problem. We explore the implications of extended models for both the spectrum of the neutralinos and the cascade decays of the neutralinos and charginos. Extra steps due to light decoupled neutralinos in the cascade decays of both neutralinos and charginos allow an excess of trilepton events compared to the MSSM and the existence of events with higher lepton multiplicity. Additionally, displaced vertices of the χ20 due to small decay widths in some models may be observable.
AB - Extending the Higgs sector of the MSSM by the addition of a gauge singlet scalar field can remedy the μ problem. We explore the implications of extended models for both the spectrum of the neutralinos and the cascade decays of the neutralinos and charginos. Extra steps due to light decoupled neutralinos in the cascade decays of both neutralinos and charginos allow an excess of trilepton events compared to the MSSM and the existence of events with higher lepton multiplicity. Additionally, displaced vertices of the χ20 due to small decay widths in some models may be observable.
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U2 - 10.1016/j.physletb.2006.11.043
DO - 10.1016/j.physletb.2006.11.043
M3 - Article
AN - SCOPUS:33845866353
SN - 0370-2693
VL - 644
SP - 361
EP - 369
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 - 5-6
ER -