6 papers
A Dual-Resolution Prescription in the Method for Boltzmann Neutrino Transport I: Proof of Principle and the Resolution of Collision Term
Akira Ito, Ryuichiro Akaho, Hiroki Nagakura +1
We propose a dual-resolution prescription meant for the Boltzmann neutrino transport, in which the advection and collision terms are calculated with different angular resolutions i…
Asymmetric emissions of neutrinos in the cooling of rotating proto-neutron stars
Laura Barrio, Kotaro Fujisawa, Ryuichiro Akaho +2
We evaluate global asymmetry in the luminosities of neutrinos emitted from rapidly-rotating proto-neutron stars (PNS's). We build axisymmetric models of PNS's in mechanical equilib…
Comparative Testing of Subgrid Models for Fast Neutrino Flavor Conversions in Core-collapse Supernova Simulations
Ryuichiro Akaho, Hiroki Nagakura, Shoichi Yamada
We investigate key methodologies of Bhatnagar-Gross-Krook subgrid modeling for neutrino fast flavor conversions (FFC) in core-collapse supernova based on spherically symmetric Bolt…
Core-collapse supernova explosions hindered by eV-mass sterile neutrinos
Kanji Mori, Tomoya Takiwaki, Kazunori Kohri +1
Light sterile neutrinos, , are often introduced to explain an anomalous deficit in the electron antineutrino flux from nuclear reactors. If they exist, sterile neutrinos woul…
Quasi-steady evolution of fast neutrino-flavor conversions
Jiabao Liu, Hiroki Nagakura, Masamichi Zaizen +3
In astrophysical environments such as core-collapse supernovae (CCSNe) and binary neutron star mergers (BNSMs), neutrinos potentially experience substantial flavor mixing due to th…
Diffuse supernova neutrino background with up-to-date star formation rate measurements and long-term multidimensional supernova simulations
Nick Ekanger, Shunsaku Horiuchi, Hiroki Nagakura +1
The sensitivity of current and future neutrino detectors like Super-Kamiokande (SK), JUNO, Hyper-Kamiokande (HK), and DUNE is expected to allow for the detection of the diffuse sup…