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arXiv · 2305.00611

Observable proton decay and gauge coupling unification in the improved missing doublet SU(5) model

Maria Mehmood·Mansoor Ur Rehman
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Abstract

We investigate the possibility of observable proton decay within the improved missing doublet model (IMDM75), which utilizes a Higgs in 75 representation for $SU(5)$ gauge symmetry breaking. The realization of observable proton decay in IMDM75 is made feasible primarily due to chirality nonflipping color-triplet mediation, while chirality flipping mediation is adequately suppressed. Our predictions suggest a range of proton lifetimes between $10^{34}-10^{36}$ yr, which can be observed in upcoming experiments such as Hyper-K and DUNE, for a corresponding range of color-triplet mass parameter $M_T$ in the order of $10^{11}-10^{14}$GeV. IMDM75 is shown to offer unique predictions for branching ratios when compared to other grand unified theory models. Finally, a realization of successful gauge coupling unification is achieved, even with the presence of particles at intermediate scales.

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Maria Mehmood, Mansoor Ur Rehman. 2023-05-01. Observable proton decay and gauge coupling unification in the improved missing doublet SU(5) model. https://doi.org/10.1103/physrevd.108.075030

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