2002/12/23 by C. Barbero, César A. Barbero, G. López Castro +2
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #BETA (programming language) #Beta decay #Branching fraction #Computer science #Double beta decay #Electron #Hadron #Hyperon #Lepton #Lepton number #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Strangeness #hep-ph #nucl-th
paper · pdf · doi:10.1016/s0370-2693(03)00773-1
published as Phys.Lett. B566 (2003) 98-107 · 14 pages in espcrc1 latex style. 2 eps figures. Minor changes added
arxiv created 2002/12/23 · openalex publication_date 2003/06/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We compute the strangeness-conserving double beta decay of Σ− hyperons, which is the only hadronic system that can undergo such decays. We consider both, the lepton number conserving Σ−→Σ+e−e−ν̄ν̄ (ββΣ2ν) and the lepton number violating Σ−→Σ+e−e− (ββΣ0ν) modes. The branching ratios of these ββ decays are suppressed at the level of 10−30 considering a light neutrino scenario in the case of the ββΣ0ν channel. The dynamical origin of such low rates and their possible enhancements are briefly discussed. Given its simplicity those decays can be used also for the purposes of illustrating the main features of double beta decays.