Correlating $0\nu\beta\beta$ decays and flavor observables in leptoquark models

Fajfer, Svjetlana (avtor), Leal, L. P. S. (avtor), Sumensari, Olcyr (avtor), Zukanovich Funchal, R. (avtor)

In this paper, we investigate minimal scalar leptoquark models that dynamically generate neutrino Majorana masses at the one-loop level and examine their implications for low-energy processes. We show that these models can produce viable neutrino masses, consistent with neutrino oscillation and cosmological data. By using leptoquark couplings f ixed by neutrino data, we predict additional contributions to neutrinoless double-beta decays ($0\nu\beta\beta$), which are chirality enhanced and compete with the standard contributions from the Majorana masses. Our analysis demonstrates that these effects are sizable for leptoquark masses as large as $\mathcal{O}$(300 TeV), potentially increasing or decreasing the $0\nu\beta\beta$ half-life, and creating an ambiguity between the normal and inverted mass ordering scenarios. Furthermore, we explore the correlation between $0\nu\beta\beta$ and flavor observables, such as kaon decays and $\mu \to e$ conversion in nuclei, emphasizing that the latter is complementary to $0\nu\beta\beta$ decays.

• Jezik: Angleški jezik
• Ključne besede: physics of elementary particles, leptoquarks
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 30 str.
• Številčenje: Vol. 2025, art. no. 147
• PID: 20.500.12556/RUL-167169
• UDK: 539.120
• ISSN pri članku: 1029-8479
• DOI: 10.1007/JHEP01(2025)147
• COBISS.SI-ID: 225671939
• Datum objave v RUL: 11.02.2025

Gradivo je del revije

• Naslov: The journal of high energy physics
• Skrajšan naslov: J. high energy phys.
• Založnik: SISSA
• ISSN: 1029-8479
• COBISS.SI-ID: 1314148

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, leptokvarki