Y. Sugiyama

activity

20142022

K_{L} \to π^{0} ν ν

and

K_{L} \to π^{0} X^{0}

Decays at the J-PARC KOTO Experiment

176 citations · 299 across the 11 of their papers we have counts for

collaborators

11 papers

physics.acc-ph2022

Update of beam coupling impedance evaluation by the stretched-wire method

T. Toyama, A. Kobayashi, T. Nakamura +10

In many cases beam coupling impedances or wake fields are calculated with computer simulator such as CST Studio Suite, GdfidL Electromagnetic Field Simulator and so on. But evaluat…

hep-ex2020★ 57 cited

Study of the $K_{L} \to π^{0} ν ν$ Decay at the J-PARC KOTO Experiment

KOTO Collaboration, J. K. Ahn, B. Beckford +68

The rare decay $K_{L} \to π^{0} ν ν$ was studied with the dataset taken at the J-PARC KOTO experiment in 2016, 2017, and 2018. With a single event sensitivity of $( 7.20 \p…

hep-ex2020★ 3 cited

First Search for the $K_{L} \to π^{0} γ$ Decay

J. K. Ahn, B. Beckford, M. Campbell +59

We report the first search for the $K_{L} \to π^{0} γ$ decay, which is forbidden by Lorentz invariance, using the data from 2016 to 2018 at the J-PARC KOTO experiment. With a single ev…

physics.acc-ph2019

The feedback system for the longitudinal coupled-bunch instabilities in the J-PARC Main Ring

Yasuyuki Sugiyama, Fumihiko Tamura, Masahito Yoshii

The J-PARC Main Ring (MR) has achieved the delivery of the 30 GeV proton beam with the beam power of 500 kW to the neutrino experiment in May 2018. The longitudinal coupled-bunch i…

hep-ex2018★ 176 cited

Search for $K_{L} \to π^{0} ν ν$ and $K_{L} \to π^{0} X^{0}$ Decays at the J-PARC KOTO Experiment

KOTO Collaboration, J. K. Ahn, B. Beckford +67

A search for the rare decay $K_{L} \to π^{0} ν ν$ was performed. With the data collected in 2015, corresponding to $2.2 \times 1 0^{19}$ protons on target, a single event se…

physics.acc-ph2018

Longitudinal Mode-by-Mode Feedback System for The J-PARC Main Ring

Yasuyuki Sugiyama, Fumihiko Tamura, Masahito Yoshii

The J-PARC Main Ring (MR) is a high intensity proton synchrotron, which accelerates protons from 3 GeV to 30 GeV. The MR delivers $2.6 \times 1 0^{14}$ protons per pulse, which corres…

physics.acc-ph2018★ 12 cited

Development of next generation LLRF control system for J-PARC rapid cycling synchrotron

Fumihiko Tamura, Yasuyuki Sugiyama, Masahito Yoshii +1

The low level rf (LLRF) control system for the rapid cycling synchrotron (RCS) of the Japan Proton Accelerator Research Complex (J-PARC) started its operation in 2007. The key func…

hep-ex2016★ 20 cited

A new search for the $K_{L} \to π^{0} ν ν$ and $K_{L} \to π^{0} X^{0}$ decays

J. K. Ahn, K. Y. Baek, S. Banno +87

We searched for the $C P$ -violating rare decay of neutral kaon, $K_{L} \to π^{0} ν ν$ , in data from the first 100 hours of physics running in 2013 of the J-PARC KOTO experimen…

physics.ins-det2015★ 14 cited

Long-lived neutral-kaon flux measurement for the KOTO experiment

T. Masuda, J. K. Ahn, S. Banno +54

The KOTO ( $K^{0}$ at Tokai) experiment aims to observe the CP-violating rare decay $K_{L} \to π^{0} ν ν ˉ$ by using a long-lived neutral-kaon beam produced by the 30 GeV proton…

physics.ins-det2014★ 6 cited

Photon-Veto Counters at the Outer Edge of the Endcap Calorimeter for the KOTO Experiment

T. Matsumura, T. Shinkawa, H. Yokota +17

The Outer-Edge Veto (OEV) counter subsystem for extra-photon detection from the backgrounds for the? $K_{L}^{0} \to π^{0} ν ν ˉ$ decay is located at the outer edge of the endcap Cs…

physics.ins-det2014★ 11 cited

The Data Acquisition System for the KOTO Experiment

Yasuyuki Sugiyama, Jia Xu, Monica Tecchio +11

We developed and built a new system of readout and trigger electronics, based on the waveform digitization and pipeline readout, for the KOTO experiment at J-PARC, Japan. KOTO aims…