Weak triplet models of neutrino magnetic moments

Fajfer, Svjetlana (avtor), Saad, Shaikh (avtor)

Experimental limits on neutrino magnetic moments remain several orders of magnitude above the predictions of the Standard Model; therefore, any future detection would provide unambiguous evidence for new physics. In models with Dirac neutrinos, however, mechanisms that enhance the magnetic moment typically generate excessively large neutrino masses. Recently, it has been argued that in frameworks where neutrinos mix with weak-triplet Dirac fermions, the magnetic moment can be decoupled from the neutrino mass. In this work, we revisit this possibility and show that sizable enhancements remain highly nontrivial to realize naturally. We demonstrate that, although the minimal realization allows the magnetic moment to be decoupled from the neutrino mass, obtaining an observable enhancement requires a delicate adjustment of the model parameters. Moreover, in extended scenarios, the decoupling no longer persists: the magnetic moment and neutrino mass become intrinsically linked, such that attempts to enhance the former inevitably induce large contributions to the latter.

• 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
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: 11 str.
• Številčenje: Vol. 86, art. no. 1150
• PID: 20.500.12556/RUL-189477
• UDK: 539.120
• ISSN pri članku: 1434-6052
• DOI: 10.1140/epjc/s10052-026-16456-8
• COBISS.SI-ID: 294111747
• Datum objave v RUL: 07.10.2026

Gradivo je del revije

• Naslov: European physical journal : Particles and fields
• Skrajšan naslov: Eur. phys. j., C Part. fields
• Založnik: Springer
• ISSN: 1434-6052
• COBISS.SI-ID: 516110361

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: N1-0321
• Naslov: Obarvani skalari v fiziki onkraj standardnega modela

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