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29 March 2024
 
  » arxiv » 1609.6750

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Masses of Open-Flavour Heavy-Light Hybrids from QCD Sum-Rules
J. Ho ; D. Harnett ; T.G. Steele ;
Date 21 Sep 2016
AbstractWe use QCD Laplace sum-rules to predict masses of open-flavour heavy-light hybrids where one of the hybrid’s constituent quarks is a charm or bottom and the other is an up, down, or strange. We compute leading-order, diagonal correlation functions of several hybrid interpolating currents, taking into account QCD condensates up to dimension-six, and extract mass predictions for all $J^Pin{0^{pm},,1^{pm}}$. Within theoretical uncertainties, we find degeneracy between the heavy-nonstrange and heavy-strange hybrids in all $J^P$ channels. Also, our mass predictions are nearly degenerate under parity flips. For the charm-light hybrids there is a clear mass hierarchy of heavier scalar states which becomes less pronounced for the bottom-light hybrids. Possible effects of mixing with conventional quark-antiquark mesons are also explored.
Source arXiv, 1609.6750
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