Published March 29, 2012
| Submitted
Journal Article
Open
Natural Supersymmetry and b → sγ constraints
Abstract
We investigate constraints from the observed branching ratio for b → sγ and fine-tuning in the framework of natural supersymmetry. The natural supersymmetry requires the large trilinear coupling of the stop sector, light higgsinos (a small μ parameter) and light stops, in order to reduce the finetuning in the Higgs sector while avoiding the LEP constraint. It is found that in such a scenario 5% (10%) level of fine-tuning is inevitable due to the b→sγ constraint even if the messenger scale is as low as 10^5 GeV (10^4 GeV), provided that the gaugino masses satisfy the GUT relation.
Additional Information
© 2012 Elsevier B.V. Received 13 December 2011. Revised 31 January 2012. Accepted 16 February 2012. Available online 22 February 2012. Editor: T. Yanagida. We thank Kazuhiro Tobe for useful discussion. N.Y. would like to thank Caltech Particle Theory group where this work has been carried out. This work is supported by Grant-in-Aid for Scientific research from the Ministry of Education, Science, Sports, and Culture (MEXT), Japan, No. 22-7585 (N.Y.). This work was also supported in part by the U.S. Department of Energy under contract No. DE-FG02-92ER40701, and by the Gordon and Betty Moore Foundation (K.I.).Attached Files
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Additional details
- Eprint ID
- 31854
- DOI
- 10.1016/j.physletb.2012.02.052
- Resolver ID
- CaltechAUTHORS:20120608-113439037
- 22-7585
- Ministry of Education, Science, Sports, and Culture (MEXT), Japan
- DE-FG02-92ER40701
- Department of Energy (DOE)
- Gordon and Betty Moore Foundation
- Created
-
2012-06-20Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field
- Caltech groups
- Caltech Theory, Moore Center for Theoretical Cosmology and Physics