Diagnosis of a New Neutral Gauge Boson at the LHC and ILC for Snowmass 2013

TL;DR

This paper explores the potential to detect and characterize a hypothetical Z' boson at future colliders like the LHC and ILC, focusing on discovery, measurement, and exclusion scenarios for TeV-scale Z' models.

Contribution

It provides a detailed analysis of how future collider experiments can identify, measure, and distinguish Z' bosons in various beyond Standard Model theories.

Findings

Potential to measure Z' mass and width at high luminosity LHC and ILC.

Ability to distinguish between different Z' models using asymmetries.

Exclusion limits for Z' if not directly observable.

Abstract

A U(1)' or Z' is generic in many scenarios of physics beyond the Standard Model, such as string theory compactifications, GUTs, extra-dimensions, compositeness, dynamical electroweak symmetry breaking, dark-sector models, etc. We study the potential of probing a TeV-scale Z' with electroweak couplings in future experiments. In particular, we focus on two scenarios: (1) If a Z' is discovered at the LHC, what is the potential of measuring its mass and width and to distinguish between benchmark models utilizing various observables, especially asymmetries, at a high luminosity LHC and the ILC. (2) If the Z' is not accessible as a clear resonance signal, what is the exclusion reach at the ILC.