On messengers couplings in extended GMSB models

Understand

We discuss, for the first time, the role of the superpotential couplings of three messenger fields in a GMSB-type unification model in which messenger sector consists of both 5+5bar and 10+10bar of SU(5).

• It turns out that these interactions are relevant when coexist with appropriate messenger-MSSM couplings.
• Then they induce extra contributions to 2-loop soft masses.
• In the present model, we derive all such soft terms and discuss constraints which have to be satisfied to avoid rapid proton decay and mu/B_mu problem.