We study an extension of the minimal supersymmetric standard model by an anomalous Abelian vector multiplet and a Stückelberg multiplet. The anomalies are cancelled by the Green-Schwarz mechanism and the addition of Chern-Simons terms. The advantage of this choice over the standard one is that it allows for arbitrary values of the quantum numbers of the extra U(1). As a first step toward the study of hadron annihilations producing four leptons in the final state (a clean signal which might be studied at LHC), we then compute the decays Z′→Z0γ and Z′→Z0Z0. We find that the largest values of the decay rate are ∼10-4 GeV, while the expected number of events per year at LHC is at most of the order of 10.
Anastasopoulos, P., Fucito, F., Lionetto, A.m., Pradisi, G., Racioppi, A., Stanev, Y.s. (2008). Minimal anomalous U(1)-prime extension of the MSSM. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 78(8) [10.1103/PhysRevD.78.085014].
Minimal anomalous U(1)-prime extension of the MSSM
LIONETTO, ANDREA MICHELE;PRADISI, GIANFRANCO;
2008-01-01
Abstract
We study an extension of the minimal supersymmetric standard model by an anomalous Abelian vector multiplet and a Stückelberg multiplet. The anomalies are cancelled by the Green-Schwarz mechanism and the addition of Chern-Simons terms. The advantage of this choice over the standard one is that it allows for arbitrary values of the quantum numbers of the extra U(1). As a first step toward the study of hadron annihilations producing four leptons in the final state (a clean signal which might be studied at LHC), we then compute the decays Z′→Z0γ and Z′→Z0Z0. We find that the largest values of the decay rate are ∼10-4 GeV, while the expected number of events per year at LHC is at most of the order of 10.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
