TY - JOUR
T1 - Natural supersymmetry and b→sγ constraints
AU - Ishiwata, Koji
AU - Nagata, Natsumi
AU - Yokozaki, Norimi
N1 - Funding Information:
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.).
PY - 2012/3/29
Y1 - 2012/3/29
N2 - 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 fine-tuning 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 5GeV(10 4GeV), provided that the gaugino masses satisfy the GUT relation.
AB - 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 fine-tuning 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 5GeV(10 4GeV), provided that the gaugino masses satisfy the GUT relation.
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U2 - 10.1016/j.physletb.2012.02.052
DO - 10.1016/j.physletb.2012.02.052
M3 - Article
AN - SCOPUS:84858442741
SN - 0370-2693
VL - 710
SP - 145
EP - 148
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1
ER -