Composite scalars at the LHC: the Higgs, the Sextet and the Octet

Giacomo Cacciapaglia, Haiying Cai, Aldo Deandrea, Thomas Flacke, Seung J. Lee, Alberto Parolini

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)


Abstract: We present a phenomenological theory of scalar particles that transform as a sextet and an octet of QCD interactions. These particles may arise as light bound states of a fundamental dynamics giving rise to a composite Higgs boson and partial compositeness for the top. As a concrete example, we discuss an explicit UV completion based on the SU(4)/Sp(4) coset, where QCD colour is carried by additional fundamental fermions charged under the confining gauge group. Top partners, as well as potentially even lighter coloured scalars, arise as bound states of the coloured fermions. We study production and detection at LHC Run I and II of the octet and sextet, setting lower limits on masses and couplings to Standard Model particles using existing 8 TeV analyses. We finally explore prospects for the ongoing 13 TeV Run II: we focus on final states with two same sign leptons, that have the potential to discriminate the sextet.

Original languageEnglish
Article number201
Pages (from-to)1-40
Number of pages40
JournalJournal of High Energy Physics
Issue number11
Publication statusPublished - 2015 Nov 1

Bibliographical note

Publisher Copyright:
© 2015, The Author(s).


  • Beyond Standard Model
  • Global Symmetries
  • Technicolor and Composite Models

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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