Excited and exotic charmonium spectroscopy from lattice QCD - INSPIRE

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Excited and exotic charmonium spectroscopy from lattice QCD

Hadron Spectrum

Collaboration

•

Liuming Liu
(
- Trinity Coll., Dublin
)

Apr, 2012

32 pages

Published in:

JHEP 07 (2012) 126

e-Print:

1204.5425 [hep-ph]

DOI:

10.1007/JHEP07(2012)126

Report number:

TCDMATH-12-04,
JLAB-THY-12-1510

View in:

reference search347 citations

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Abstract: (arXiv)

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 approximately 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.

Note:

33 pages, 17 figures/ v2: minor changes to reflect published version

hadron spectroscopy
charmonium: excited state
quantum number
quantum chromodynamics
lattice
spin: high
dispersion relation
two-point function
operator
correlation function

References(48)

Figures(0)

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