Can We Reach the Scale of New Physics Behind the $B$ Anomalies?

TL;DR

This paper evaluates the potential of future colliders to discover new physics models explaining B-meson decay anomalies, providing bounds and discovery conditions for high-energy experiments.

Contribution

It offers a conservative estimate of the collider sensitivities to minimal Z' and leptoquark models related to B anomalies, guiding future experimental strategies.

Findings

High-luminosity LHC can probe significant parameter space.

Future colliders like HE-LHC and FCC-hh greatly enhance discovery prospects.

Upper bounds on model parameters are established for each collider.

Abstract

Indirect signs of new physics beyond the Standard Model may be appearing in $B \to K^{(*)}\mu^+\mu^-$ decays. If confirmed, the title question will be of paramount importance in determining the strategy for future colliders. We answer it by estimating the sensitivity to minimal, anomaly-compatible $Z^\prime$ and leptoquark models at the high luminosity LHC, 27 TeV HE-LHC, and 100 TeV FCC-hh; this conservative analysis outlines an upper bound on the available parameter space and the conditions for a reasonable guarantee of direct discovery.