Distinguishing spins at the LHC using bound state signals

Dilani Kahawala, Yevgeny Kats

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


A pair of new colored particles produced near the threshold can form a bound state and then annihilate into standard model particles. In this paper we show how the bound state signals can distinguish between two scenarios that have similar particle content and interactions but different spins, such as the minimal supersymmetric standard model (MSSM) and universal extra dimensions (UED). We find, for example, that bound states of KK gluons (KK gluonia) have an order of magnitude larger cross sections than gluinonia and they may be detectable as resonances in the bb, tt or γγ channels if the KK gluon is very light and sufficiently long-lived. KK gluonia can be distinguished from gluinonia by their much larger cross sections and distinct angular distributions. Similarly, KK quarkonia can be distinguished from squarkonia by the size of their diphoton cross section and by their dilepton signals. Since many of our results are largely determined by gauge interactions, they will be useful for many other new physics scenarios as well.

Original languageEnglish
Article number99
JournalJournal of High Energy Physics
Issue number9
StatePublished - 1 Jan 2011
Externally publishedYes


  • Beyond Standard Model
  • Hadronic Colliders
  • Heavy Quark Physics
  • QCD

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


Dive into the research topics of 'Distinguishing spins at the LHC using bound state signals'. Together they form a unique fingerprint.

Cite this