Explanipedia

CLIC readiness report Open

E. Adli, G. D’Auria, Nuria Catalán Lasheras, S. Doebert, Michael Draper , et al. · 2025

The Compact Linear Collider (CLIC) is a TeV-scale high-luminosity linear e + e − collider studied by the international CLIC and CLICdp collaborations hosted by CERN. CLIC uses a two-beam acceleration scheme, in which normal-conducting high…

First Associated Neutrino Search for a Failed Supernova Candidate with Super-Kamiokande Open

K. Abe, Shintaro Miki, Minoru Harada, K Hosokawa, Tzu-Chiao Hung , et al. · 2025

In 2024, a failed supernova candidate, M31-2014-DS1, was reported in the Andromeda galaxy (M31), located at a distance of approximately 770 kpc. In this paper, we search for neutrinos from this failed supernova using data from Super-Kamiok…

Measurement of neutron production in atmospheric neutrino interactions at Super-Kamiokande Open

S. Han, K. Abe, S. Abe, Y. Asaoka, C. Bronner , et al. · 2025

We present measurements of total neutron production from atmospheric neutrino interactions in water, analyzed as a function of electron-equivalent visible energy over a range of 30 MeV to 10 GeV. These results are based on 4,270 days of da…

Sensitivity of the Hyper-Kamiokande experiment to neutrino oscillation parameters using acceleration neutrinos Open

K. Abe, R. Ahl Laamara, H. Aihara, A. Ajmi, Y. Nishimura , et al. · 2025

This paper describes the analysis to estimate the sensitivity of the Hyper-Kamiokande experiment to long-baseline neutrino oscillation parameters using accelerator (anti)neutrinos. Results are presented for the CPV discovery sensitivity an…

First Joint Oscillation Analysis of Super-Kamiokande Atmospheric and T2K Accelerator Neutrino Data Open

K. Abe, S Abe, C. Bronner, Y. Hayato, K. Hiraide , et al. · 2025

The Super-Kamiokande and T2K collaborations present a joint measurement of neutrino oscillation parameters from their atmospheric and beam neutrino data. It uses a common interaction model for events overlapping in neutrino energy and corr…

Search for proton decay via and with a 0.37 Mton-year exposure of Super-Kamiokande Open

N. Taniuchi, K. Abe, S. Abe, Y. Asaoka, C. Bronner , et al. · 2024

A search for proton decay into e+/μ+ and a η meson has been performed using data from a 0.373 Mton·year exposure (6050.3 live days) of Super-Kamiokande. Compared to previous searches this work introduces an improved model of the intranucl…

Measurements of the charge ratio and polarization of cosmic-ray muons with the Super-Kamiokande detector Open

H. Kitagawa, T Tada, K. Abe, C. Bronner, Y. Hayato , et al. · 2024

We present the results of the charge ratio (R) and polarization (P0μ) measurements using decay electron events collected between September 2008 and June 2022 with the Super-Kamiokande detector. Because of its underground location and long …

Stochastic Track Vibration Analysis in Consideration of Log-Normal Type Spatial Variation of Rail Material Parameters and Shape Dimensions Open

Kazuhiro KORO, Kojiro Suzuki, K. Abe · 2024

We investigate the influence of random variables selection on spatial variation of rail material parameters and shape dimensions to the expected value and the standard deviation of the simulated track dynamic response.The spatial variation…

Development of a Data Overflow Protection System for Super-Kamiokande to Maximize Data from Nearby Supernovae Open

M. Mori, K. Abe, Y. Hayato, K. Hiraide, K. Hosokawa , et al. · 2024

Neutrinos from very nearby supernovae, such as Betelgeuse, are expected to generate more than ten million events over 10 s in Super-Kamokande (SK). At such large event rates, the buffers of the SK analog-to-digital conversion board (QBEE) …

Impedance modelling and single-bunch collective instability simulations for the SuperKEKB main rings Open

Takuya Ishibashi, M. Migliorati, Demin Zhou, K. Shibata, K. Abe , et al. · 2024

The SuperKEKB is an electron-positron collider consisting of two storage rings: the 4 GeV-positron low-energy ring and the 7 GeV-electron high-energy ring. The impedance of the rings has been modeled using electromagnetic simulation codes …

Atmospheric neutrino oscillation analysis with neutron tagging and an expanded fiducial volume in Super-Kamiokande I-V Open

Kamiokande Collaboration, T. Wester, K. Abe, C. Bronner, Y. Hayato , et al. · 2023

We present a measurement of neutrino oscillation parameters with the Super-Kamiokande detector using atmospheric neutrinos from the complete pure-water SK I-V (April 1996-July 2020) data set, including events from an expanded fiducial volu…

Development of Low-Z Collimator for SuperKEKB Open

Shinji Terui, K. Abe, Y. Funakoshi, Takuya Ishibashi, Hiroyuki Nakayama , et al. · 2021

Collimator jaws for SuperKEKB main ring, which is an electron-positron collider, installed to suppress background noise in a particle detector complex named Belle II. The collimators are successful to reduce backgrounds when the collimator…

Indirect search for dark matter from the Galactic Center and halo with the Super-Kamiokande detector Open

K. Abe, C. Bronner, Y. Haga, Y. Hayato, M. Ikeda , et al. · 2020

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM

GRAPE-Dilepton (Version 1.1) A generator for dilepton production in ep collisions Open

K. Abe · 2019

GRAPE-Dilepton is a Monte Carlo event generator for dilepton production in ep collisions. The cross-section calculation is based on the exact matrix elements in the electroweak theory at tree level. The dilepton productions via γγ, γZ^0 , …

Design, fabrication, and high-gradient testing of -band choke-mode damped structures Open

Xiaowei Wu, Hao Zha, Jiaru Shi, Huaibi Chen, K. Abe , et al. · 2019

Choke-mode accelerating structures are higher-order-mode (HOM) damped structures that are relatively simple to fabricate and have low surface magnetic fields. C-band choke-mode accelerating structures have been successfully applied in free…

Direct observation of breakdown trigger seeds in a normal-conducting rf accelerating cavity Open

K. Abe, T. Kageyama, Hiroshi Sakai, Y. Takeuchi, K. Yoshino · 2018

In our previous study on a normal-conducting 508.9-MHz continuous-wave accelerating cavity, it was discovered that most breakdown events were accompanied by the explosion of a stable bright spot on one of the two end plates of the cavity (…

Progress in Understanding Breakdown Characteristics of X-Band Choke-Mode Structures Open

Xiaowei Wu, K. Abe, Dezhi Cao, Huaibi Chen, T. Higo , et al. · 2018

As one of the higher-order-mode (HOM) damping structures, X-band choke-mode accelerating structures had been studied for several years. However, the breakdown characteristics of the X-band choke are still unknown. Five different single-cel…

High-Gradient Performance of X-Band Choke-Mode Structures Open

Xiaowei Wu, K. Abe, Dezhi Cao, Huaibi Chen, T. Higo , et al. · 2018

The choke-mode accelerating structure is one of the higher-order-mode (HOM) damping structures. It has the advantage of relatively simple fabrication and low surface magnetic field. C-band choke-mode accelerating structures have been succe…

LONG TERM EFFECT OF CREEP STRENGTH FOR DAMAGED GEOSYNTHETICS DURING CONSTRUCTION Open

Masaaki Yokoyama, Mikio KUBO, Yoshinao KURACHI, K. Abe, Yashushi MARUYAMA · 2018

ジオシンセティックスからなる補強材（以下，「補強材」という．）の耐衝撃性は，施工時の盛土材の特性及び転圧機械による転圧力に起因している．通常，代表的な土や重機を用いて耐衝撃性試験を行い，材料安全率を設定しているが，盛土材への建設発生土の有効活用で，トンネルズリのような，粒径の大きな岩塊が含まれる盛土材が使用されるケースがある．また，近年施工の効率化を目的に，大型の転圧機械が使用されるようになってきている．トンネルズリ等を大型の転圧機械を使用して施工した場合，補強材の損傷が懸…

APPLICATION OF A GABION SOIL WALL STRUCTURALLY CONTINUED WITH REINFORCEMENT TO HIGH EMBANKMENT OF EXPRESSWAY Open

K. Abe, Koji Nakazawa, Yasushi Maruyama, Mikio KUBO · 2018

本論文では，高速道路建設における傾斜地盤上での高盛土工事で適用された補強材一体ふとん籠補強土壁の採用経緯や施工状況，また，裏込め材の転圧による補強材の損傷の影響評価ならびに施工中および施工後の動態観測の結果について報告する．今回，補強土壁背面の裏込め部や盛土内の地下水の排出効果を期待し，壁面材にふとん籠を有した本補強土壁を採用した．施工においては壁面材として使用するふとん籠の形状保持が課題となったが，はらみ出し防止枠を設けることで解決を図った．補強材の損傷については補強材の…

A preliminary study of the structure of b{bar b}g events using Z{sup 0} decays Open

K. Abe, Ko Abe, K. Abe · 2017

The structure of three-jet b{bar b}g events has been studied using hadronic Z{sup 0} decays recorded in the SLD experiment at SLAC. Three-jet final states were selected and the CCD-based vertex detector was used to identify two of the jets…

Crystal structure, site selectivity, and electronic structure of layered chalcogenide LaOBiPbS <sub>3</sub> Open

Yoshikazu Mizuguchi, Yuh Hijikata, K. Abe, Chikako Moriyoshi, Yoshihiro Kuroiwa , et al. · 2017

We have investigated the crystal structure of LaOBiPbS3 using neutron\ndiffraction and synchrotron X-ray diffraction. From structural refinements, we\nfound that the two metal sites, occupied by Bi and Pb, were differently\nsurrounded by t…

Search for Lorentz and violation using sidereal time dependence of neutrino flavor transitions over a short baseline Open

K. Abe, J. L. Amey, C. Andreopoulos, M. Antonova, S. Aoki , et al. · 2017

We thank the J-PARC staff for superb accelerator \nperformance. We thank the CERN NA61 Collaboration \nfor providing valuable particle production data. We \nacknowledge the support of MEXT, Japan; NSERC \n(Grant No. SAPPJ-2014-00031), NRC …

High-gradient breakdown studies of an -band Compact Linear Collider prototype structure Open

Xiaowei Wu, Jiaru Shi, Huaibi Chen, Jiahang Shao, K. Abe , et al. · 2017

A Compact Linear Collider prototype traveling-wave accelerator structure fabricated at Tsinghua University was recently high-gradient tested at the High Energy Accelerator Research Organization (KEK). This X-band structure showed good high…

Design, fabrication and high-gradient tests of X-band choke-mode structures Open

Xiaowei Wu, Jiaru Shi, Huaibi Chen, Hao Zha, K. Abe , et al. · 2017

Two standing-wave single-cell choke-mode damped structures with different choke dimensions which worked at 11.424 GHz were designed, manufactured and tuned by accelerator group in Tsinghua University. High power test was carried out to stu…

Commissioning of the Phase-I SuperKEKB B-Factory and Update on the Overall Status Open

Y. Ohnishi, K. Abe, Toshikazu Adachi, K. Akai, Y. Arimoto , et al. · 2017

The SuperKEKB B-Factory at KEK (Japan), after few years of shutdown for the construction and renovation, has finally come to the Phase-1 commissioning of the LER and HER rings, without the final focus system and the Belle II detector. Vacu…

High-Gradient Breakdown Studies of X-Band Choke-Mode Structures Open

Xiaowei Wu, K. Abe, Huaibi Chen, T. Higo, Shuji Matsumoto , et al. · 2017

As an alternative design for Compact Linear Collider (CLIC) main accelerating structures, X-band choke-mode damped structures had been studied for several years. However, the performance of choke-mode cavity under high power is still in la…

Mechanical Properties of Zircaloy-4 Cladding Tube by Advanced Expansion due to Compression (A-EDC) Test Open

Zhankui Zhao, D. Kunii, K. Abe, Huilong Yang, Sho Kano , et al. · 2016

A new testing technique named advanced expansion due to compression (A-EDC) has been developed with an attempt to study the hoop mechanical behavior of Zircaloy-4 cladding under the pellet-cladding mechanical interaction (PCMI) and the pre…

Breakdown study based on direct<i>in situ</i>observation of inner surfaces of an rf accelerating cavity during a high-gradient test Open

K. Abe, T. Kageyama, Hiroshi Sakai, Y. Takeuchi, K. Yoshino · 2016

We have developed normal-conducting accelerating single-cell cavities with a complete higher-order-mode (HOM) heavily damped structure, into which we feed a 508.9-MHz continuous wave. During a high-gradient test of the second production ve…

Updated baseline for a staged Compact Linear Collider Open

Mark Boland, Eva Barbara Holzer, G. Shirkov, J P Delahaye, H. Arfaei , et al. · 2016

The Compact Linear Collider (CLIC) is a multi-TeV high-luminosity linear e+e- collider under development. For an optimal exploitation of its physics potential, CLIC is foreseen to be built and operated in a staged approach with three centr…

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