Minimal Anomalous U(1)' Extension of the MSSM

Abstract

We study an extension of the MSSM 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 towards 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 $Z'\to Z_0 \g$ and $Z^{\prime }\to Z_0{Z}_0$. We find that the largest values of the decay rate is $\sim 10^{-4}$ GeV, while the expected number of events per year at LHC is at most of the order of 10.

45 pages, 8 eps figures, feynmf. Phenomenological section expanded. 2 plots and references added

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• The Weinberg Operator and a Lower String Scale in Orientifold Compactifications
• Neutron Majorana mass from exotic instantons
• On Dark Matter Interactions with the Standard Model through an Anomalous $Z^{\prime }$
• Electric/magnetic duality for chiral gauge theories with anomaly cancellation
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• Axion and Neutralinos from Supersymmetric Extensions of the Standard Model with anomalous U(1)'s
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• The Elusive Muonic WIMP
• Emergent neutrinos from heavy messengers
• Dynamical Supersymmetry Breaking in Intersecting Brane Models
• Neutron Majorana mass from Exotic Instantons in a Pati-Salam model
• Precision studies for string derived $Z^{\prime }$ dynamics at the LHC
• Recent Trends in Superstring Phenomenology
• Reheating and Leptogenesis after Vector inflation
• Pinning down the leptophobic $Z^{\prime }$ in leptonic final states with Deep Learning
• Light stringy states and the $g-2$ of the muon
• Production of Chern-Simons bosons in decays of mesons
• Testing B-violating signatures from Exotic Instantons in future colliders
• Axi-Higgs portal Dark Matter via Wess-Zumino mechanism
• Anomalous $U(1)$ extension of the Standard Model
• Divergences in the effective loop interaction of the Chern-Simons bosons with leptons. The unitary gauge case
• Probing triple-gauge couplings in anomalous gauge theories at hadron and lepton colliders
• Lifetimes of light stringy states
• $Z^{\prime }$s and sterile neutrinos from heterotic string models: exploring $Z^{\prime }$ mass exclusion limits
• Anomalous U(1) and Asymmetry