An interesting framework to achieve gauge coupling unification consists in adding to the Standard Model Lagrangian nonrenormalizable operators of d >= 5, which affect the kinetic term of gauge fields. We first review the phenomenology related to this framework in the context of SU(5), identifying which are the most interesting representations for the sake of achieving coupling unification. Second, we point out that in the case of a dynamical breaking pattern, it is possible to relate gauge coupling unification with the doublettriplet splitting problem. We show that condensates of fermions in the 5 representation do not lead to viable models because of proton decay constraints. At difference, we point out that successful models can be obtained by considering condensates of fermions in the 10, as well as in the 24 representations.
Gauge coupling unification and doublet-triplet splitting via GUT dynamical breaking
Masina, Isabella
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2026
Abstract
An interesting framework to achieve gauge coupling unification consists in adding to the Standard Model Lagrangian nonrenormalizable operators of d >= 5, which affect the kinetic term of gauge fields. We first review the phenomenology related to this framework in the context of SU(5), identifying which are the most interesting representations for the sake of achieving coupling unification. Second, we point out that in the case of a dynamical breaking pattern, it is possible to relate gauge coupling unification with the doublettriplet splitting problem. We show that condensates of fermions in the 5 representation do not lead to viable models because of proton decay constraints. At difference, we point out that successful models can be obtained by considering condensates of fermions in the 10, as well as in the 24 representations.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
