Two-neutrino Decay of Xe to the first excited 0 State in Ba

التفاصيل البيبلوغرافية
العنوان: Two-neutrino Decay of Xe to the first excited 0 State in Ba
المؤلفون: Jokiniemi, L., Romeo, B., Brase, C., Kotila, J., Soriano, P., Schwenk, A., Menéndez, J.
المصدر: Physics Letters
بيانات النشر: Elsevier, 2023.
سنة النشر: 2023
الوصف: We calculate the nuclear matrix element for the two-neutrino ββ decay of $^{136}$Xe into the first excited 0+ state of $^{136}$Ba. We use different many-body methods: the quasiparticle random-phase approximation (QRPA) framework, the nuclear shell model, the interacting boson model (IBM-2), and an effective field theory (EFT) for β and ββ decays. While the QRPA suggests a decay rate at the edge of current experimental limits, the shell model points to a half-life about two orders of magnitude longer. The predictions of the IBM-2 and the EFT lie in between, and the latter provides systematic uncertainties at leading order. An analysis of the running sum of the nuclear matrix element indicates that subtle cancellations between the contributions of intermediate states can explain the different theoretical predictions. For the EFT, we also present results for two-neutrino ββ decays to the first excited 0+ state in other nuclei.
اللغة: English
URL الوصول: https://explore.openaire.eu/search/publication?articleId=od______3000::7f6c8ef2fac66693809926af49efc86e
http://repo.scoap3.org/api
حقوق: OPEN
رقم الأكسشن: edsair.od......3000..7f6c8ef2fac66693809926af49efc86e
قاعدة البيانات: OpenAIRE