Possible interpretation of the Zb(10610) and Zb(10650) in a chiral quark model

Motivated by the two charged bottomonium-like resonances Zb(10610) and Zb(10650) newly observed by the Belle collaboration, the possible molecular states composed of a pair of heavy mesons, , etc (in S-wave), are investigated in the framework of chiral quark models by the Gaussian expansion method....

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Bibliographic Details
Published in:Journal of physics. G, Nuclear and particle physics Nuclear and particle physics, 2012-10, Vol.39 (10)
Main Authors: Yang, You-Chang, Ping, Jialun, Deng, Chengrong, Zong, Hong-Shi
Format: Article
Language:English
Subjects:
bottomonium
chiral quark model
Exact sciences and technology
molecular state
Nuclear physics
Physics
The physics of elementary particles and fields
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Summary:Motivated by the two charged bottomonium-like resonances Zb(10610) and Zb(10650) newly observed by the Belle collaboration, the possible molecular states composed of a pair of heavy mesons, , etc (in S-wave), are investigated in the framework of chiral quark models by the Gaussian expansion method. The bound states and with quantum numbers I(JPC) = 1(1+−), which are good candidates for the Zb(10610) and Zb(10650), respectively, are obtained. Another three bound states with I(JPC) = 0(1++), with I(JPC) = 1(0++), 0(2++) are predicted. These states may be observed in an open-bottom or a hidden-bottom decay channel of highly excited . When directly extending the quark model to the hidden-color channel of the multi-quark system, more deeply bound states are found. Future experimental search of those states will cast doubt on the validity of applying the chiral constituent quark model to the hidden-color channel directly.
ISSN:0954-3899
1361-6471
DOI:10.1088/0954-3899/39/10/105001