Supersymmetric Decays of the Z' Boson

TL;DR

This paper explores how supersymmetric decay modes of the Z' boson influence current experimental limits and future detection prospects at the LHC, highlighting the importance of these modes in understanding supersymmetry breaking.

Contribution

It provides a detailed analysis of supersymmetric decay channels of the Z' boson across three models, showing their impact on mass limits and detection strategies at colliders.

Findings

Current Z' mass limits can be significantly lowered due to supersymmetric decays.

Projected LHC sensitivities could reach up to 4.3 TeV for certain models.

Identifying supersymmetric decay modes is crucial for understanding supersymmetry breaking.

Abstract

The decay of the Z' boson into supersymmetric particles is studied. We investigate how these supersymmetric modes affect the current limits from the Tevatron and project the expected sensitivities at the LHC. Employing three representative supersymmetric Z' models, namely, E_6, U(1)_{B-L}, and the sequential model, we show that the current limits of the Z' mass from the Tevatron could be reduced substantially due to the weakening of the branching ratio into leptonic pairs. The mass reach for the E_6 Z' bosons is about 1.3-1.5 TeV at the LHC-7 (1 fb^{-1}), about 2.5 - 2.6 TeV at the LHC-10 (10 fb^{-1}), and about 4.2 - 4.3 TeV at the LHC-14 (100 fb^{-1}). A similar mass reach for the U(1)_{B-L} Z' is also obtained. We also examine the potential of identifying various supersymmetric decay modes of the Z' boson because it may play a crucial role in the detailed dynamics of supersymmetry breaking.