χc decays and the gluon component of the η′, η mesons
Harland-Lang, L.A.; Khoze, V.A.; Ryskin, M.G.; Shuvaev, A.G.
The large mass of the η′ meson indicates that a sizeable gluon component is present in the meson wave function. However, the χc0 and χc2 decays to η′ mesons, which proceed via a purely gluonic intermediate state and we would therefore naïvely expect to be enhanced by such a component, are in fact relatively suppressed. We argue that this apparent contradiction may be resolved by a proper treatment of interference effects in the decay. In particular, by accounting for the destructive interference between the quark and gluon components of the η′ distribution function, in combination with a model for strange quark mass effects, we demonstrate that the observed χc(0,2)→η(′)η(′) branching ratios can be reproduced for a reasonable gluon component of the η′, η mesons.
Harland-Lang, L., Khoze, V., Ryskin, M., & Shuvaev, A. (2017). χc decays and the gluon component of the η′, η mesons. Physics Letters B, 770, 88-92. https://doi.org/10.1016/j.physletb.2017.04.046
|Journal Article Type||Article|
|Acceptance Date||Apr 20, 2017|
|Online Publication Date||Apr 26, 2017|
|Publication Date||Jul 10, 2017|
|Deposit Date||Jul 6, 2017|
|Publicly Available Date||Jul 6, 2017|
|Journal||Physics Letters B|
|Peer Reviewed||Peer Reviewed|
Published Journal Article
Publisher Licence URL
© 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license<br /> (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
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