Lower bound on the pseudoscalar mass in the minimal supersymmetric standard model
- Department of Physics, University of California, Riverside, California 92521 (United States)
- Tata Institute of Fundamental Research, Mumbai 400005 (India)
In the Higgs sector of the minimal supersymmetric standard model, the mass of the pseudoscalar A is an independent parameter together with tan{beta}{equivalent_to}v{sub 2}/v{sub 1}. If m{sub A} is small, then the process e{sup +}e{sup {minus}}{r_arrow}h+A is kinematically allowed and is suppressed only if tan{beta} is small, i.e., less than one. On the other hand, the mass of the charged Higgs boson is now near M{sub W}, and the decay t{r_arrow}b+h{sup +} is enhanced if tan{beta}{lt}1. Since the former has not been observed, and the branching fraction of t{r_arrow}b+W cannot be too small (by comparing the experimentally derived t{bar t} cross section from the leptonic channels with the theoretical prediction), we can infer a phenomenological lower bound on m{sub A} of at least 60 GeV for all values of tan{beta}. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 543937
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 56; ISSN 0556-2821; ISSN PRVDAQ
- Country of Publication:
- United States
- Language:
- English
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