Gauge and Scalar Boson Mediated Proton Decay in a Predictive SU(5) GUT Model
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| Format: | Preprint |
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2024
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| _version_ | 1866910422545727488 |
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| author | Doršner, Ilja Džaferović-Mašić, Emina Fajfer, Svjetlana Saad, Shaikh |
| author_facet | Doršner, Ilja Džaferović-Mašić, Emina Fajfer, Svjetlana Saad, Shaikh |
| contents | We assess proton decay signatures in the simplest viable $SU(5)$ model with regard to constraints on parameters governing the Standard Model fermion mass spectrum. Experimental signals for all eight two-body proton decay processes result from exchange of two gauge bosons, a single scalar leptoquark, or their combination. Consequently, it enables us to delve into an in-depth anatomy of proton decay modes and anticipate future signatures. Our findings dictate that observing a proton decay into $p\toπ^0e^+$ indicates gauge boson mediation, with the potential for observation of $p\toη^0e^+$ mode. Alternatively, if decay is through $p\to K^+\overlineν$ process, it is mediated by a scalar leptoquark, possibly allowing the observation of $p\toπ^0μ^+$. Detection of both $p\toπ^0 e^+$ and $p\to K^+\overlineν$ could enhance $p\toπ^0μ^+$ through constructive interference. The model predicts inaccessibility of $p\toπ^+\overlineν$, $p\toη^0μ^+$, $p\to K^0e^+$, and $p\to K^0μ^+$, regardless of the dominant mediation type, in the coming decades. In summary, through a comprehensive analysis of proton decay signals, gauge coupling unification, and fermion masses and mixing, we precisely constrain the parameter space of the $SU(5)$ model in question. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2401_16907 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gauge and Scalar Boson Mediated Proton Decay in a Predictive SU(5) GUT Model Doršner, Ilja Džaferović-Mašić, Emina Fajfer, Svjetlana Saad, Shaikh High Energy Physics - Phenomenology We assess proton decay signatures in the simplest viable $SU(5)$ model with regard to constraints on parameters governing the Standard Model fermion mass spectrum. Experimental signals for all eight two-body proton decay processes result from exchange of two gauge bosons, a single scalar leptoquark, or their combination. Consequently, it enables us to delve into an in-depth anatomy of proton decay modes and anticipate future signatures. Our findings dictate that observing a proton decay into $p\toπ^0e^+$ indicates gauge boson mediation, with the potential for observation of $p\toη^0e^+$ mode. Alternatively, if decay is through $p\to K^+\overlineν$ process, it is mediated by a scalar leptoquark, possibly allowing the observation of $p\toπ^0μ^+$. Detection of both $p\toπ^0 e^+$ and $p\to K^+\overlineν$ could enhance $p\toπ^0μ^+$ through constructive interference. The model predicts inaccessibility of $p\toπ^+\overlineν$, $p\toη^0μ^+$, $p\to K^0e^+$, and $p\to K^0μ^+$, regardless of the dominant mediation type, in the coming decades. In summary, through a comprehensive analysis of proton decay signals, gauge coupling unification, and fermion masses and mixing, we precisely constrain the parameter space of the $SU(5)$ model in question. |
| title | Gauge and Scalar Boson Mediated Proton Decay in a Predictive SU(5) GUT Model |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2401.16907 |