Excited and exotic charmonium spectroscopy from lattice QCD

Liuming Liu, Graham Moir, Michael Peardon, Sinéad M. Ryan, Christopher E. Thomas, Pol Vilaseca, Jozef J. Dudek, Robert G. Edwards, Bálint Joó, David G. Richards

Research output: Contribution to journalArticlepeer-review

195 Scopus citations

Abstract

We present a spectrum of highly excited charmonium mesons up to around 4.5 GeV calculated using dynamical lattice QCD. Employing novel computational techniques and the variational method with a large basis of carefully constructed operators, we extract and reliably identify the continuum spin of an extensive set of excited states, states with exotic quantum numbers (0 +-, 1 , 2 +-) and states with high spin. Calculations are performed on two lattice volumes with pion mass ≈ 400 MeV and the mass determinations have high statistical precision even for excited states. We discuss the results in light of experimental observations, identify the lightest 'supermultiplet' of hybrid mesons and comment on the phenomenological implications of the spectrum of exotic mesons.

Original languageEnglish
Article number126
JournalJournal of High Energy Physics
Volume2012
Issue number7
DOIs
StatePublished - 2012
Externally publishedYes

Funding

FundersFunder number
Seventh Framework Programme238353, 273320

    Keywords

    • Lattice QCD
    • QCD

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