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Article overview
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Exploring the Spectrum of Heavy Quarkonium Hybrids with QCD Sum Rules | | R. T. Kleiv
; B. Bulthuis
; D. Harnett
; T. Richards
; Wei Chen
; J. Ho
; T. G. Steele
; Shi-Lin Zhu
; | | Date: |
23 Oct 2014 | | Abstract: | QCD Laplace sum rules are used to calculate heavy quarkonium (charmonium and
bottomonium) hybrid masses in several distinct $J^{PC}$ channels. Previous
studies of heavy quarkonium hybrids did not include the effects of
dimension-six condensates, leading to unstable sum rules and unreliable mass
predictions in some channels. We have updated these sum rules to include
dimension-six condensates, providing new mass predictions for the spectra of
heavy quarkonium hybrids. We confirm the finding of other approaches that the
negative-parity $J^{PC}=left(0,1,2
ight)^{-+},,1^{--}$ states form the
lightest hybrid supermultiplet and the positive-parity
$J^{PC}=left(0,1
ight)^{+-},,left(0,1,2
ight)^{++}$ states are members of
a heavier supermultiplet. Our results disfavor a pure charmonium hybrid
interpretation of the $X(3872)$, in agreement with previous work. | | Source: | arXiv, 1410.6259 | | Services: | Forum | Review | PDF | Favorites | |
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