H. Watanabe

activity

20112022

K_{L} \to π^{0} ν ν

and

K_{L} \to π^{0} X^{0}

Decays at the J-PARC KOTO Experiment

176 citations · 294 across the 8 of their papers we have counts for

collaborators

8 papers

hep-ex2022★ 3 cited

Search for the Pair Production of Dark Particles $X$ with $K_{L}^{0} \to X X$ , $X \to γ γ$

C. Lin, J. K. Ahn, J. M. Choi +39

We present the first search for the pair production of dark particles $X$ via $K_{L}^{0} \to X X$ with $X$ decaying into two photons using the data collected by the KOTO experiment. No s…

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…

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…

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…

hep-ex2011★ 15 cited

Study of the K0(L) --> pi0 pi0 nu nu-bar decay

E391a Collaboration, R. Ogata, S. Suzuki +67

The rare decay K0(L) --> pi0 pi0 nu nu-bar was studied with the E391a detector at the KEK 12-GeV proton synchrotron. Based on 9.4 x 10^9 K0L decays, an upper limit of 8.1 x 10^{-7}…

Search for the Pair Production of Dark Particles X with KL0​→XX, X→γγ

Study of the KL​→π0νν Decay at the J-PARC KOTO Experiment

First Search for the KL​→π0γ Decay

Search for KL​→π0νν and KL​→π0X0 Decays at the J-PARC KOTO Experiment

A new search for the KL​→π0νν and KL​→π0X0 decays