Tootfinder

Long-term neutrino emission from a core-collapse supernova with axion-photon coupling
Masamitsu Mori, Kanji Mori
https://arxiv.org/abs/2509.05973 https://a…

Long-term neutrino emission from a core-collapse supernova with axion-photon coupling
We perform long-term general-relativistic neutrino-radiation hydrodynamic simulations for core-collapse supernovae (CCSNe) which include the cooling effect induced by the coupling between axion-like particles (ALPs) and photons. We take into account the \kanji{photon} coalescence and the Primakoff effect, and investigate ALPs with the mass of 10\,MeV and the coupling constant $g_{aγ}$ of $1.0\times10^{-9}{\rm \,GeV^{-1}}$ to $7.0\times10^{-9}{\rm \,GeV^{-1}}$. It is found that the effects of t…

Apparent Horizons Associated with Dynamical Black Hole Entropy
Hideo Furugori, Kanji Nishii, Daisuke Yoshida, Kaho Yoshimura
https://arxiv.org/abs/2507.14105

Apparent Horizons Associated with Dynamical Black Hole Entropy
We define entropic marginally outer trapped surfaces (E-MOTSs) as a generalization of apparent horizons. We then show that, under first-order perturbations around a stationary black hole, the dynamical black hole entropy proposed by Hollands, Wald, and Zhang, defined on a background Killing horizon, can be expressed as the Wall entropy evaluated on an E-MOTS associated with it. Our result ensures that the Hollands-Wald-Zhang entropy reduces to the standard Wald entropy in each stationary regime…

MixedG2P-T5: G2P-free Speech Synthesis for Mixed-script texts using Speech Self-Supervised Learning and Language Model
Joonyong Park, Daisuke Saito, Nobuaki Minematsu
https://arxiv.org/abs/2509.01391

MixedG2P-T5: G2P-free Speech Synthesis for Mixed-script texts using Speech Self-Supervised Learning and Language Model
This study presents a novel approach to voice synthesis that can substitute the traditional grapheme-to-phoneme (G2P) conversion by using a deep learning-based model that generates discrete tokens directly from speech. Utilizing a pre-trained voice SSL model, we train a T5 encoder to produce pseudo-language labels from mixed-script texts (e.g., containing Kanji and Kana). This method eliminates the need for manual phonetic transcription, reducing costs and enhancing scalability, especially for …

Impacts of axion cooling on the direct detection of supernova axions
Kanji Mori, Masamitsu Mori
https://arxiv.org/abs/2508.18491 https://arxiv.org/pdf/2508…

Impacts of axion cooling on the direct detection of supernova axions
Core-collapse supernovae provide a unique opportunity to probe axions because they can be a copious source of the particles. It has recently been proposed that axion helioscopes can be used for the direct search for supernova axions if a supernova event appears within a few hundred parsecs. However, the event number of supernova axions has been estimated only within the post-process framework. In this study, we perform long-term supernova simulations for a 9.6M_sun star coupled with the axion e…