Implications of a new light scalar near the bottomonium regime

Matthew Baumgart, Andrey Katz

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

We study the decay modes of a new, light spin-0 particle, arguing that if the mass of the (pseudo)scalar is ∼ 11-15 GeV, it can have an appreciable branching ratio into bottomonium, in particular the rare %s. Using non-relativistic QCD (NRQCD), we calculate its decay rate to bottomonia for mass splittings greater than the typical momentum transfer within the bound state. It can exceed that of decays to other Standard Model fermions under the assumption of couplings proportional to those of the Standard Model. At smaller splittings, where our computational methods break down, we estimate the rate into bottomonia using data-driven methods. When the spin-0 state decays to bottomonia whose mass is too light to produce B-meson pairs, we get a qualitatively new experimental signature, decays to 6-quarks invisible to 6-tagging. Such a light, spinless particle can arise in extended Higgs sectors, making this channel potentially observable in decay chains initiated by the subdominant decay of a Standard Model-like Higgs to a pair of them.

Original languageEnglish (US)
Article number133
JournalJournal of High Energy Physics
Volume2012
Issue number8
DOIs
StatePublished - 2012

Keywords

  • Beyond Standard Model
  • Heavy Quark Physics
  • Rare Decays

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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