English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We study the resonant spin-flavor (RSF) conversion of supernova neutrinos,which is induced by the interaction between the nonzero neutrino magneticmoment and the supernova magnetic fields, and its dependence on presupernovamodels. As the presupernova models, we adopt the latest ones by Woosley, Heger,and Weaver, and, further, models with both solar and zero metallicity areinvestigated. Since the $(1-2Y_e)$ profile of the new presupernova models,which is responsible for the RSF conversion, suddenly drops at the resonanceregion, the completely adiabatic RSF conversion is not realized, even if$\mu_\nu B_0= (10^{-12}\mu_B)(10^{10} G)$, where $B_0$ is the strength of themagnetic field at the surface of the iron core. In particular for the modelwith zero metallicity, the conversion is highly nonadiabatic in the high energyregion, reflecting the $(1-2Y_e)$ profile of the model. In calculating theflavor conversion, we find that the shock wave propagation, which changesdensity profiles drastically, is a much more severe problem than it is for thepure Mikheyev-Smirnov-Wolfenstein (MSW) conversion case. This is because theRSF effect occurs at a far deeper region than the MSW effect. To avoid theuncertainty concerning the shock propagation, we restrict our discussion to 0.5s after the core bounce (and for more conservative discussion, 0.25 s), duringwhich the shock wave is not expected to affect the RSF region. We also evaluatethe energy spectrum at the Super-Kamiokande detector for various models usingthe calculated conversion probabilities, and find that it is very difficult toobtain useful information on the supernova metallicities and magnetic fields oron the neutrino magnetic moment from the supernova neutrino observation. Futureprospects are also discussed.Comment: 10 pages, 7 figures, corrected minor typos, added reference. Final  version to appear in Physical Review

Resonant spin-flavor conversion of supernova neutrinos: Dependence on presupernova models and future prospects