Neutrino Process in Core-collapse Supernovae with Neutrino Self-interaction and MSW Effects

Abstract

We calculate the abundances of 7Li, 11B, 92Nb, 98Tc, 138La, and 180Ta produced by neutrino (ν)-induced reactions in a core-collapse supernova explosion. We consider the modification by ν self-interaction (ν-SI) near the neutrinosphere and the Mikheyev–Smirnov–Wolfenstein (MSW) effect in the outer layers based on time-dependent neutrino energy spectra. Abundances of 7Li and the heavy isotopes 92Nb, 98Tc, and 138La are reduced by a factor of 1.5–2.0 by the ν-SI. In contrast, 11B is relatively insensitive to the ν-SI. We find that the abundance ratio of heavy to light nuclei, 138La/11B, is sensitive to the neutrino mass hierarchy, and the normal mass hierarchy is more likely to be consistent with the solar meteoritic abundances.

Conversions of propagation eigenstates of supernova neutrinos by atomic electrons

“…In addition, some rare nuclei such as 7 Li, 11 B, 138 La and 180 Ta are produced by neutrino reactions in SN nucleosynthesis [26]. Yields of light rare nuclei 7 Li and 11 B [27] as well as heavy nuclei including short-lived nuclei [28] depend on the neutrino mass hierarchy. Those nuclear yields are then also a probe of the flavor conversions induced by atomic electrons in stars.…”

Progress in nuclear astrophysics of east and southeast Asia

“…Extensive calculations showed that another short-lived radioactive isotope 92 Nb and stable ones 138 La and 180 Ta also are produced in the ν-process. These nuclei are useful to constrain still unknown mass hierarchy [286][287][288]. Figure 7 shows an example of the 7 Be and 92 Nb abundances as a function of the Lagrangian mass M r .…”

Flavour specific neutrino self-interaction: $H_0$ tension and IceCube

“…Therefore, a substantial region of the preferred mass range by IceCube is disallowed by the CMB bound (see fig. (10)).…”

“…Self interaction in between the neutrinos has been an active topic of interest in different sectors of cosmology [1][2][3][4][5][6][7][8], astro-physics [9,10] and laboratory based neutrino experiments [11][12][13]. In the recent years it has been studied extensively in the context of resolving H 0 tension [3,4].…”