S. Futagi
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View article: Search for charged excited states of dark matter with KamLAND-Zen
Search for charged excited states of dark matter with KamLAND-Zen Open
View article: Combined Pre-supernova Alert System with KamLAND and Super-Kamiokande
Combined Pre-supernova Alert System with KamLAND and Super-Kamiokande Open
Preceding a core-collapse supernova (CCSN), various processes produce an increasing amount of neutrinos of all flavors characterized by mounting energies from the interior of massive stars. Among them, the electron antineutrinos are potent…
View article: Search for charged excited states of dark matter with KamLAND-Zen
Search for charged excited states of dark matter with KamLAND-Zen Open
View article: RFSoC-based front-end electronics for pulse detection
RFSoC-based front-end electronics for pulse detection Open
Radiation measurement relies on pulse detection, which can be performed using various configurations of high-speed analog-to-digital converters (ADCs) and field-programmable gate arrays (FPGAs). For optimal power consumption, design simpli…
View article: RFSoC-based front-end electronics for pulse detection
RFSoC-based front-end electronics for pulse detection Open
Radiation measurement relies on pulse detection, which can be performed using various configurations of high-speed analog-to-digital converters (ADCs) and field-programmable gate arrays (FPGAs). For optimal power consumption, design simpli…
View article: Search for Charged Excited States of Dark Matter with KamLAND-Zen
Search for Charged Excited States of Dark Matter with KamLAND-Zen Open
Particle dark matter could belong to a multiplet that includes an electrically charged state. WIMP dark matter ($χ^{0}$) accompanied by a negatively charged excited state ($χ^{-}$) with a small mass difference (e.g. $<$ 20 MeV) can form a …
View article: Measurement of cosmic-ray muon spallation products in a xenon-loaded liquid scintillator with KamLAND
Measurement of cosmic-ray muon spallation products in a xenon-loaded liquid scintillator with KamLAND Open
Cosmic-ray muons produce various radioisotopes when passing through material. These spallation products can be backgrounds for rare event searches such as in solar neutrino, double-β decay, and dark matter search experiments. The KamLAND-Z…
View article: First measurement of the strange axial coupling constant using neutral-current quasielastic interactions of atmospheric neutrinos at KamLAND
First measurement of the strange axial coupling constant using neutral-current quasielastic interactions of atmospheric neutrinos at KamLAND Open
We report a measurement of the strange axial coupling constant $g_A^s$ using atmospheric neutrino data at KamLAND. This constant is a component of the axial form factor of the neutral-current quasielastic (NCQE) interaction. The value of $…
View article: Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen
Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen Open
The KamLAND-Zen experiment has provided stringent constraints on the neutrinoless double-beta (0νββ) decay half-life in ^{136}Xe using a xenon-loaded liquid scintillator. We report an improved search using an upgraded detector with almost …
View article: Concept of KamLAND2 DAQ system
Concept of KamLAND2 DAQ system Open
The KamLAND-Zen experiment is searching for neutrinoless double-beta decay of 136 Xe. We are preparing for the upgrade of the KamLAND detector, KamLAND2. It is designed to improve the discrimination power of two-neutrino double-beta decay …
View article: Abundances of Uranium and Thorium Elements in Earth Estimated by Geoneutrino Spectroscopy
Abundances of Uranium and Thorium Elements in Earth Estimated by Geoneutrino Spectroscopy Open
The decay of the primordial isotopes 238 U, 235 U, 232 Th, and 40 K has contributed to the terrestrial heat budget throughout the Earth's history. Hence, the individual abundance of those isotopes are key parameters in reconstructing conte…
View article: KamLAND’s search for correlated low-energy electron antineutrinos with astrophysical neutrinos from IceCube
KamLAND’s search for correlated low-energy electron antineutrinos with astrophysical neutrinos from IceCube Open
View article: Search for Supernova Neutrinos and Constraint on the Galactic Star Formation Rate with the KamLAND Data
Search for Supernova Neutrinos and Constraint on the Galactic Star Formation Rate with the KamLAND Data Open
We present the results of a search for core-collapse supernova neutrinos, using long-term KamLAND data from 2002 March 9 to 2020 April 25. We focus on the electron antineutrinos emitted from supernovae in the energy range of 1.8–111 MeV. S…
View article: A Search for Correlated Low-energy Electron Antineutrinos in KamLAND with Gamma-Ray Bursts
A Search for Correlated Low-energy Electron Antineutrinos in KamLAND with Gamma-Ray Bursts Open
We present the results of a time-coincident event search for low-energy electron antineutrinos in the KamLAND detector with gamma-ray bursts (GRBs) from the Gamma-ray Coordinates Network and Fermi Gamma-ray Burst Monitor. Using a variable …