Gauge and scalar boson mediated proton decay in a predictive SU(5) GUT model

Doršner, Ilja (avtor), Džaferović-Mašić, Emina (avtor), Fajfer, Svjetlana (avtor), Saad, Shaikh (avtor)

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 $p \to \pi^0 e^+$ indicates gauge boson mediation, with the potential for observation of $p \to \eta^0 e^+$ mode. Alternatively, if decay is through the $p \to K^+ \bar{\nu}$ process, it is mediated by a scalar leptoquark, possibly allowing the observation of $p \to \pi^0 \mu^+$. Detection of both $p \to \pi^0 e^+$ and $p \to K^+ \bar{\nu}$ could enhance $p \to \pi^0 \mu^+$ through constructive interference. The model predicts inaccessibility of $p \to \pi^+\bar{\nu}$, $p \to \eta^0 \mu^+$, $p \to K^0 e^+$, and $p \to K^0 \mu^+$, 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 both accurately and precisely constrain the parameter space of the $SU(5)$ model in question.

• Jezik: Angleški jezik
• Ključne besede: physics of elementary particles
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Različica publikacije: Objavljena publikacija
• Datum objave: 12.04.2024
• Leto izida: 2024
• Št. strani: Str. 075023-1-075023-19
• Številčenje: Vol. 109, iss. 7
• PID: 20.500.12556/RUL-155975
• UDK: 539.1
• ISSN pri članku: 2470-0010
• DOI: 10.1103/PhysRevD.109.075023
• COBISS.SI-ID: 193887491
• Datum objave v RUL: 25.04.2024

Gradivo je del revije

• Naslov: Physical review. D
• Skrajšan naslov: Phys. rev., D
• Založnik: American Physical Society
• ISSN: 2470-0010
• COBISS.SI-ID: 29757223

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: fizika osnovnih delcev

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P1-0035-2019
• Naslov: Teorija jedra, osnovnih delcev in polj

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: N1-0321-2023
• Naslov: Obarvani skalari v fiziki onkraj standardnega modela