Dynamically solving the {mu}/B{sub{mu}}problem in gauge-mediated supersymmetry breaking.
We provide a simple solution to the {mu}/B{sub {mu}} problem in the gauge-mediated Next-to-Minimal Supersymmetric Standard Model. In this model the messenger sector contains one pair of 3+{bar 3} and one pair of 2+{bar 2} messengers. These two messenger pairs couple to different gauge singlets in the hidden sector in which supersymmetry (SUSY) is broken. Such a gauge-mediation structure can naturally arise in many backgrounds. Because of the two effective SUSY breaking scales <F{sub i}>/<M{sub i}> in the messenger sector, the renormalization group evolutions of the soft SUSY breaking parameters can be properly modified, leading to a negative enough singlet soft mass square m{sub N}{sup 2}({Lambda}{sub EW}) and hence reasonable {mu}/B{sub {mu}} values. In most of the perturbative (up to the GUT scale) parameter region, as a result, the electroweak scale is stabilized and phenomenologically interesting mass spectra of particles and superparticles are obtained. In addition, this model favors large values of tan {beta}: 5 {approx} 50 and a heavy scalar spectrum. With the relatively large tan {beta}, the light U(1){sub R} pseudoscalar (mainly appearing in the low-scale gauge-mediated SUSY breaking models) becomes extremely singlet-like, and is no longer a problem in this model. These features apply to all cases of low-, intermediate- and high-scale gauge-mediated SUSY breaking.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Fermi-McCormick Fellowship
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 981640
- Report Number(s):
- ANL-HEP-PR-08-11; TRN: US1003833
- Journal Information:
- JHEP, Vol. 2008, Issue 6 ; Jun. 2008
- Country of Publication:
- United States
- Language:
- ENGLISH
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