This title appears in the Scientific Report :
2013
Please use the identifier:
http://hdl.handle.net/2128/5451 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevD.87.074006 in citations.
Confirming the molecular nature of the $Z_{b}$(10610) and the $Z_{b}$(10650)
Confirming the molecular nature of the $Z_{b}$(10610) and the $Z_{b}$(10650)
The decays of the $Z_b(10610)$ and the $Z_b(10650)$ to $\Upsilon(nS)\pi$, $h_b(mP)\pi$ and $\chi_{bJ}(mP)\gamma$ ($n=1,2,3$, $m=1,2$ and $J=0,1,2$) are investigated within a nonrelativistic effective field theory. It is argued that, while the decays to $\Upsilon(nS) \pi$ suffer from potentially larg...
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Personal Name(s): | Cleven, Martin (Corresponding author) |
---|---|
Wang, Qian / Guo, Feng-Kun / Hanhart, Christoph / Meißner, Ulf-G. / Zhao, Qiang | |
Contributing Institute: |
Theorie der Starken Wechselwirkung; IAS-4 Theorie der starken Wechselwirkung; IKP-3 |
Published in: | Physical Review D Physical review / D, 87 87 (2013 2013) 7 7, S. 074006 074006 |
Imprint: |
[S.l.]
Soc.
2013
2013-04-09 2013-04-01 |
DOI: |
10.1103/PhysRevD.87.074006 |
Document Type: |
Journal Article |
Research Program: |
Hadron Structure and Dynamics (HSD) |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevD.87.074006 in citations.
The decays of the $Z_b(10610)$ and the $Z_b(10650)$ to $\Upsilon(nS)\pi$, $h_b(mP)\pi$ and $\chi_{bJ}(mP)\gamma$ ($n=1,2,3$, $m=1,2$ and $J=0,1,2$) are investigated within a nonrelativistic effective field theory. It is argued that, while the decays to $\Upsilon(nS) \pi$ suffer from potentially large higher order corrections, the $P$-wave transitions of the $Z_b$ states offer the best possibility to confirm the nature of the $Z_b$ states as molecular states and to further study their properties. We give nontrivial and parameter-free predictions for the ratios of various partial widths for final states with $h_b(mP)\pi$ and $\chi_{bJ}(mP)\gamma$. In addition, the branching fractions for the neutral $Z_b$-states to $\chi_{bJ}\gamma$ are predicted to be of order $10^{-4}$--$10^{-3}$. This provides a fine test of the molecular nature in future high-luminosity experiments. |