期刊
PHYSICAL REVIEW D
卷 87, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.87.034020
关键词
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资金
- National Natural Science Foundation of China [10947007, 11035006, 11175104, 11275113]
- DFG [CRC 110]
- NSFC [CRC 110]
- Chinese Academy of Sciences [KJCX3-SYW-N2]
- Ministry of Science and Technology of China [2009CB825200]
- Natural Science Foundation of Shandong Province [ZR2010AM011, ZR2011AM006]
- Scientific Research Starting Foundation of Qufu Normal University
With the recent measurement of Z(b)(10610) and Z(b)(10650) -> B (B) over bar* + c.c. and B*(B) over bar*, we investigate the transitions from the Z(b)(10610) and Z(b)(10650) to bottomonium states with emission of a pion via intermediate BB* meson loops. The experimental data can be reproduced in this approach with a commonly accepted range of values for the form factor cutoff parameter alpha. The Upsilon(3S)pi decay channels appear to experience obvious threshold effects which can be understood by the property of the loop integrals. By investigating the alpha-dependence of partial decay widths and ratios between different decay channels, we show that the intermediate BB* meson loops are crucial for driving the transitions of Z(b)/Z(b)' -> Upsilon(nS)pi with n = 1, 2, 3, and h(b)(mP)pi with m = 1 and 2. DOI: 10.1103/PhysRevD.87.034020
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