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Impacts of the Soft-Gluon Exchanges on B →ππ Decays |
WU Xiang-Yao1,2;LI Zuo-Hong3;CUI Jian-Ying3;HUANG Tao1 |
1Institute of High Energy Physics, Chinese Academy of
Sciences, PO Box 918(4), Beijing 100039
2Department of Physics, Huaibei Coal Industry Teachers College, Huangshan 235000
3Department of Physics, Yantai University, Yantai 264005 |
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Cite this article: |
WU Xiang-Yao, LI Zuo-Hong, CUI Jian-Ying et al 2002 Chin. Phys. Lett. 19 1596-1598 |
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Abstract We have investigated the role of soft-gluon exchanges in B →ππ, using the light-cone sum rules in quantum chromodynamics. The calculations are carried out not only for the tree operators but also for the penguin operators. We conclude that soft-gluon exchanges contribute to the decay amplitudes, noticeably on some decay channels, and thus cannot be neglected.
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Keywords:
13.25.Hw
11.55.Hx
12.38.Lg
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Published: 01 November 2002
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