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Constraints on Violation in the Fourth Generation Effect on CP
Penguin-Dominated b → s Decays
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| XING Zhizhong;DU Dongsheng |
| Institute of High Energy Physics, Academia Sinica, Beijing 100039 |
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| Cite this article: |
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XING Zhizhong, DU Dongsheng 1992 Chin. Phys. Lett. 9 9-12 |
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Abstract The direct CP-violating asymmetries for the penguin-dominated b → sg, b → sγ, and b → sl+l- decays are reexamined using the generalized 4x 4 Kobayashi-Maskawa matrix proposed by Bjorken. We find that the fourth generation effect on these asymmetries are significantly constrained by the sign of sin Ф3/ sin Ф1, the imaginary part of the loop integral function for c-quark Im(Ic) , and the mass of t'-quark. Most of the previous predictions for this effect are too optimistic.
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| Keywords:
13.25.+m
11.30.Er
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Published: 01 January 1992
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| PACS: |
13.25.+m
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11.30.Er
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(Charge conjugation, parity, time reversal, and other discrete symmetries)
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