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Radial and orbital excitation energies of charmonium · Around

2014

Radial and orbital excitation energies of charmonium

Galloway, B. A., Knecht, P., Koponen, J. et al.

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The charmonium system has several excited states below the energy threshold for decay into $D$ and $\bar{D}$ mesons, which can in principle be studied accurately in lattice QCD.

Studies that include many states in the spectrum have typically only been done at one value of the lattice spacing and with relatively heavy light quarks in the sea.
Here we give preliminary results for radial and orbital excitation energies for charmonium from a calculation on 2+1+1 MILC configurations at multiple lattice spacings and including physical values for $u/d$ quark masses.
We use the HISQ formulation for $c$ to obtain small discretisation errors and smeared operators to improve excited state overlap.

Built on

G.P. Lepage et al. , Constrained Curve Fitting , Nucl. Phys. Proc. Suppl. 106
Original
2002
Earlier work this paper cites.
E. Follana et al. , Highly improved staggered quarks on the lattice with applications to charm physics , Phys. Rev. D 75
2007
Earlier work this paper cites.
L. Liu et al. (Hadron Spectrum Collaboration), Excited and exotic charmonium spectroscopy from lattice QCD , Journal of High Energy Physics, 126
Original
2012
Earlier work this paper cites.

Similar

C. DeTar et al. (Fermilab Lattice and MILC Collaborations), Charmonium mass splittings at the physical point , in proceedings of Lattice 2012 , \pos
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G. Donald et al. (HPQCD Collaboration), Precision tests of the J / Ψ J/\Psi from full lattice QCD: Mass, leptonic width, and radiative decay rate to η c \eta_{c} , Phys. Rev. D 86
Original
2012
Cited alongside, same era.
R. J. Dowdall et al. (HPQCD Collaboration), V u s V_{us} from π \pi and K K decay constants in full lattice QCD with physical u u , d d , s s , and c c quarks , Phys. Rev. D 88
Cited in the paper.

Then

A. Bazavov et al. (MILC Collaboration), Lattice QCD ensembles with four flavors of highly improved staggered quarks , Phys. Rev. D 87
Original
2013
Later among the works it cites.
K.A. Olive et al. (Particle Data Group), The Review of Particle Physics , Chin. Phys. C, 38
2014
Closest in time.

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