Relaxing a constraint on the number of messengers in a low-scale gauge mediation

Details Relaxing a constraint on the number of messengers in a low-scale gauge mediation Relaxing a constraint on the number of messengers in a low-scale gauge mediation

2009-10-20

arxiv.org/abs/0910.3790v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

22pages; v2:explanations expanded in sec.3.2, reference added

Scientific paper

We propose a mechanism for relaxing a constraint on the number of messengers in low-scale gauge mediation models. The Landau pole problem for the standard-model gauge coupling constants in the low-scale gauge mediation can be circumvented by using our mechanism. An essential ingredient is a large positive anomalous dimension of messenger fields given by a large Yukawa coupling in a conformal field theory at high energies. The positive anomalous dimension reduces the contribution of the messengers to the beta function of the standard-model gauge couplings.

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