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Fluxes of the diffuse supernova neutrino background (DSNB) are calculated based on a new modeling of galactic chemical evolution, where a variable stellar initial mass function (IMF) depending on the galaxy type is introduced and black hole…

High Energy Astrophysical Phenomena · Physics 2023-08-16 Yosuke Ashida , Ken'ichiro Nakazato , Takuji Tsujimoto

In the delayed explosion scenario of core-collapse supernovae (SNe), the accretion phase shows pronounced convective overturns and a low-multipole hydrodynamic instability, the standing accretion shock instability (SASI). These effects…

High Energy Astrophysical Phenomena · Physics 2014-11-21 Tina Lund , Andreas Marek , Cecilia Lunardini , Hans-Thomas Janka , Georg Raffelt

We examine active-sterile neutrino conversion in the late time post-core-bounce supernova environment. By including the effect of feedback on the Mikheyev-Smirnov-Wolfenstein (MSW) conversion potential, we obtain a large range of neutrino…

High Energy Physics - Phenomenology · Physics 2014-11-17 J. Fetter , G. C. McLaughlin , A. B. Balantekin , G. M. Fuller

The dense neutrino medium in a core-collapse supernova or a neutron-star merger event can experience fast flavor conversions on time/distance scales that are much smaller than those of vacuum oscillations. It is believed that fast neutrino…

High Energy Astrophysical Phenomena · Physics 2020-01-14 Sajad Abbar , Huaiyu Duan , Kohsuke Sumiyoshi , Tomoya Takiwaki , Maria Cristina Volpe

In this paper, we explore the effects of neutrino flavor oscillations on supernova nucleosynthesis and on the neutrino signals. Our study is based on detailed information about the neutrino spectra and their time evolution from a…

High Energy Astrophysical Phenomena · Physics 2015-06-23 Meng-Ru Wu , Yong-Zhong Qian , Gabriel Martinez-Pinedo , Tobias Fischer , Lutz Huther

A new neutrino-matter interaction can potentially affect neutrino propagation through matter. In this work, we explore the impact of a flavor-conserving scalar-mediated non-standard neutrino interaction in the supernova neutrino flux. We…

High Energy Physics - Phenomenology · Physics 2026-02-24 Sudipta Das , Mary Hall Reno

Neutrinos emitted during stellar core collapse leading to a supernova are primarily of the electron neutrino type at source which may undergo oscillation between flavor eigenstates during propagation to an earth-bound detector. Although the…

Astrophysics · Physics 2009-10-30 Debasish Majumdar , Kamales Kar , Alak Ray , Amitava Raychaudhuri , Firoza K. Sutaria

We investigate the late-time neutrino emission powered by fallback mass accretion onto proto-neutron star (PNS), using neutrino radiation-hydrodynamic simulations with full Boltzmann neutrino transport. We follow the time evolution of…

High Energy Astrophysical Phenomena · Physics 2024-01-10 Ryuichiro Akaho , Hiroki Nagakura , Thierry Foglizzo

Neutrinos produced in the atmosphere traverse a column density of air before being detected at neutrino observatories like IceCube or KM3NeT. In this work, we extend the neutrino flavor evolution in the {nuSQuIDS} code accounting for the…

High Energy Physics - Phenomenology · Physics 2024-05-21 Connor Sponsler , Matheus Hostert , Ivan Martinez-Soler , Carlos A. Argüelles

Motivated by recent hints for sterile neutrinos from the reactor anomaly, we study active-sterile conversions in a three-flavor scenario (2 active + 1 sterile families) for three different representative times during the neutrino-cooling…

Solar and Stellar Astrophysics · Physics 2015-05-30 Irene Tamborra , Georg G. Raffelt , Lorenz Huedepohl , Hans-Thomas Janka

In astrophysical environments such as core-collapse supernovae and neutron star-neutron star or neutron star-black hole mergers where dense neutrino media are present, matter-neutrino resonances (MNRs) can occur when the neutrino…

High Energy Physics - Phenomenology · Physics 2015-11-24 Meng-Ru Wu , Huaiyu Duan , Yong-Zhong Qian

We propose a new method to identify flavors of ultra high energy cosmic neutrinos. Energy loss of leptons in matter provides important informations for the detection of neutrinos originated from high energy astrophysical sources. 50 years…

High Energy Physics - Phenomenology · Physics 2015-06-15 Kwang-Chang Lai , Chih-Ching Chen , Pisin Chen

Before massive stars heavier than $(8 \cdots 10)$ solar masses evolve to the phase of a gravitational core collapse, they will emit a huge number of MeV-energy neutrinos that are mainly produced in the thermal processes and nuclear weak…

High Energy Astrophysical Phenomena · Physics 2020-06-03 Hui-Ling Li , Yu-Feng Li , Liang-Jian Wen , Shun Zhou

In environments with high dense neutrino gases, such as in core-collapse supernovae, the neutrinos can experience collective neutrino oscillation due to their self-interactions. In particular, fast flavor conversion driven by the crossings…

High Energy Physics - Phenomenology · Physics 2021-11-01 Masamichi Zaizen , Taiki Morinaga

Besides the opportunity for discovering new neutrino physics, solar neutrino measurements provide a sensitive probe of the solar interior, and thus a rigorous test of solar model predictions. We present model independent determinations of…

High Energy Physics - Phenomenology · Physics 2016-09-01 Naoya Hata , Paul Langacker

The rise time of a Galactic supernova (SN) bar-nue lightcurve, observable at a high-statistics experiment such as the IceCube Cherenkov detector, can provide a diagnostic tool for the neutrino mass hierarchy at "large" 1-3 leptonic mixing…

Solar and Stellar Astrophysics · Physics 2012-05-01 Pasquale Dario Serpico , Sovan Chakraborty , Tobias Fischer , Lorenz Hudepohl , Hans-Thomas Janka , Alessandro Mirizzi

Supernova explosions provide the most sensitive probes of neutrino propagation, such as the possibility that neutrino velocities might be affected by the foamy structure of space-time thought to be generated by quantum-gravitational (QG)…

High Energy Physics - Phenomenology · Physics 2015-05-30 John Ellis , Hans-Thomas Janka , Nikolaos E. Mavromatos , Alexander S. Sakharov , Edward K. G. Sarkisyan

We investigate to what extent the oscillation or conversion of neutrinos enhances the expected event rate of the supernova relic neutrino background (SRN) at the Super-Kamiokande detector (SK). The SRN \bar\nu_e's can be almost completely…

High Energy Physics - Phenomenology · Physics 2009-10-28 Tomonori Totani , Katsuhiko Sato

Fast-pairwise neutrino oscillations potentially affect many aspects of core-collapse supernova (CCSN): the explosion mechanism, neutrino signals, and nucleosynthesis in the ejecta. This particular mode of collective neutrino oscillations…

High Energy Astrophysical Phenomena · Physics 2021-09-15 Hiroki Nagakura , Lucas Johns

It has long been recognized that the neutrinos detected from the next core-collapse supernova in the Galaxy have the potential to reveal important information about the dynamics of the explosion and the nucleosynthesis conditions as well as…

High Energy Astrophysical Phenomena · Physics 2016-08-23 Warren P. Wright , Gautam Nagaraj , James P. Kneller , Kate Scholberg , Ivo R. Seitenzahl
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