Lepton-flavor violation in light hadron decays

Znanstveni rad - Izvorni znanstveni rad

• Autor: Svjetlana Fajfer
• Autor: Amon Ilakovac
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

The lepton-flavor-violating decays of light pseudoscalar mesons and light baryons are investigated within extensions of the SU(2)×U(1) model. These models contain heavy Dirac or Majorana neutrinos and allow large lepton–heavy-neutrino mixings. The free-parameter space of these models is carefully studied. Special care is devoted to the comparison of results of different models. A large “nondecoupling” window is found, and the decoupling of extremely heavy neutrinos is explicitly shown in all models except one, for which the free-parameter space is bounded. Among the decays studied, the experimentally most interesting decays are KL→eμ and π0→eμ. The π0→eμ decay is found to be equally interesting for the study of lepton-flavor violation as KL→eμ decay. The constraint on the model parameters, coming from the nonobservation of the μ⃗ eγ decay, leads to the maximal decay rates B(KL→eμ)∼5×10-16 and B(π0→eμ)≲(2nR-2)×10-15, where nR is number of heavy neutrinos, much smaller than the present experimental upper limits.

• Ključne riječi (engleski): psudoscalar mesons; lepton flavor violation; heavy neutrino; decoupling
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical Review D, Particles and fields
• Brojčani podaci: vol. 57, br. 7, str. 4219-4235
• p-ISSN: 0556-2821
• DOI: https://doi.org/10.1103/PhysRevD.57.4219
• URN:NBN: urn:nbn:hr:217:950395
• Datum objave publikacije: 1998
• URL dokumenta: http://link.aps.org/doi/10.1103/PhysRevD.57.4219
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: Copyright (1998) by the American Physical Society.
• Datum i vrijeme pohrane: 2019-10-06 20:01:50