CaltechAUTHORS
Published March 29, 2012 | Version Submitted
Journal Article Open

Natural Supersymmetry and b → sγ constraints

Creators

  • 1. ROR icon California Institute of Technology
  • 2. ROR icon Nagoya University
  • 3. ROR icon University of Tokyo

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

Submitted - 1112.1944v1.pdf

Files

1112.1944v1.pdf

Files (385.4 kB)

Name Size
md5:84a97e2018342f8f66b254f89c4fbced
385.4 kB Preview Download

Additional details

Identifiers

Eprint ID
31854
DOI
10.1016/j.physletb.2012.02.052
Resolver ID
CaltechAUTHORS:20120608-113439037

Related works

Describes
10.1016/j.physletb.2012.02.052 (DOI)
http://arxiv.org/abs/1112.1944 (URL)

Funding

Ministry of Education, Science, Sports, and Culture (MEXT), Japan
22-7585
Department of Energy (DOE)
DE-FG02-92ER40701
Gordon and Betty Moore Foundation

Dates

Created
2012-06-20
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Caltech Theory , Moore Center for Theoretical Cosmology and Physics