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Charmonium spectroscopy and mixing with light quark and open charm states from nF=2 lattice QCD | | Gunnar S. Bali
; Sara Collins
; Christian Ehmann
; | | Date: |
11 Oct 2011 | | Abstract: | We study the charmonium spectrum including higher spin and gluonic
excitations. We determine an upper limit on the mixing of the eta_c ground
state with light pseudoscalar flavour-singlet mesons and investigate the mixing
of charmonia near open charm thresholds with pairs of (excited) D and anti-D
mesons. For charm and light valence quarks and nF=2 sea quarks, we employ the
non-perturbatively improved Sheikholeslami-Wohlert (clover) action. Excited
states are accessed using the variational technique, starting from a basis of
suitably optimised operators. For some aspects of this study, the use of
improved stochastic all-to-all propagators was essential. | | Source: | arXiv, 1110.2381 | | Services: | Forum | Review | PDF | Favorites | |
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