Searching for new physics in bottomonium decays

TL;DR

This paper explores the potential of bottomonium decays to reveal new physics, such as a light Higgs boson, by analyzing deviations from Standard Model predictions and experimental data.

Contribution

It proposes new ways to detect light Higgs bosons through bottomonium decay patterns and discusses implications of Higgs-bottomonium mixing on spectroscopy.

Findings

Current data suggest possible lepton universality breaking in Upsilon decays.

Models like MSSM can evade LEP constraints on light Higgs.

Higgs-bottomonium mixing could cause observable spectroscopic discrepancies.

Abstract

Heavy quarkonium decays can be used to search for New Physics beyond the Standard Model. In particular, a light Higgs boson could induce a slight (but observable) lepton universality breaking in Upsilon decays. In fact, current experimental data from CLEO presented in this Conference seem to point out to this direction within experimental accuracy. Moreover, LEP constraints on a light Higgs mass can be evaded by different models (like MSSM with a CPV Higgs sector) as shown in this Conference. We also consider spectroscopic consequences stemming from a possible mixing between Higgs and bottomonium states leading to discrepancies with the SM expectations (e.g. hyperfine splittings).