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PROBLEMS ON A POSSIBLE FOURTH GENERATION DOWN QUARK OF MASS 23GeV |
| ZHAO Guangda;QIN Danhua,DING Yihing*;CAI Shenou** |
| Institute for Theoretical Physics, Peking University Beijing
*Graduate School, Academia Sinica, Beijing
**Department of Physics and Astronomy, Northwestern University,
U.S.A. |
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| Cite this article: |
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ZHAO Guangda, QIN Danhua, DING Yihing et al 1988 Chin. Phys. Lett. 5 337-340 |
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Abstract For a possible fourth generation down quark of mass 23GeV we discuss the problems on the energy gap between hidden and open channels for the new flavor and on peculiar fermion mass relations in view of the grand unification. It is unlikely to be the conventionally expected fourth generation down quark.
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| Keywords:
1210C
1460J
1480D
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Published: 01 August 1988
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