T. Inagaki

activity

19972024

K_{L} \to π^{0} ν ν

and

K_{L} \to π^{0} X^{0}

Decays at the J-PARC KOTO Experiment

176 citations · 818 across the 21 of their papers we have counts for

collaborators

Showing hep-exShow all

20 papers · 1 filter

hep-ex2024★ 19 cited

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

KOTO Collaboration, J. K. Ahn, M. Farriagton +47

We performed a search for the $K_{L} \to π^{0} ν ν ˉ$ decay using the data taken in 2021 at the J-PARC KOTO experiment. With newly installed counters and new analysis method, the ex…

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…

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}…

hep-ex2010★ 4 cited

Search for the decay $K_{L}^{0} \to 3 γ$

Y. C. Tung, Y. B. Hsiung, J. K. Ahn +66

We performed a search for the decay $K_{L}^{0} \to 3 γ$ with the E391a detector at KEK. In the data accumulated in 2005, no event was observed in the signal region. Based on the…

hep-ex2010★ 3 cited

Measurement of the K+ -> pi0 mu+ nu_mu gamma Branching Ratio

The E787 Collaboration

A measurement of the decay K+ -> pi0 mu+ nu_mu gamma has been performed with the E787 detector at Brookhaven National Laboratory. Forty events were observed in the signal region wi…

hep-ex2009★ 111 cited

Experimental study of the decay $K_{L}^{0} \to π^{0} ν ν ˉ$

The E391a Collaboration, J. K. Ahn

The first dedicated search for the rare neutral-kaon decay $K_{L}^{0} \to π^{0} ν ν ˉ$ has been carried out in the E391a experiment at the KEK 12-GeV proton synchrotron. The final upper li…

hep-ex2008★ 23 cited

Search for a light pseudoscalar particle in the decay $K_{L}^{0} \to π^{0} π^{0} X$

Y. C. Tung, Y. B. Hsiung, M. L. Wu +59

We performed a search for a light pseudoscalar particle $X$ in the decay $K_{L}^{0} - > p i 0 p i 0 X$ , $X - > γ γ$ with the E391a detector at KEK. Such a particle with a mass of 214.3 MeV/ $c^{2}$ wa…

hep-ex2007

Measurement of the $K^{+} \to π^{+} ν ν ˉ$ Branching Ratio

The E949 Collaboration

Experiment E949 at Brookhaven National Laboratory studied the rare decay $K^+\toπ^+ν\barν $an d o t h er p r ocesses w i t han e x p os u r eo f$ 1.77\times 10^{12}K^+$'s. The data were anal…

hep-ex2007

New results and Possibilities in K Physics

T. Inagaki

Several topics in the Kphysics together with the new facility J-Parc are introduced.

hep-ex2007★ 8 cited

First search for $K_{L} \to π^{0} π^{0} ν ν ˉ$

J. Nix

The first search for the rare kaon decay $\kppnn$ has been performed by the E391a collaboration at the KEK 12-GeV proton synchrotron. An upper limit of $4.7 \times 1 0^{- 5}$ at the 90…

hep-ex2002★ 47 cited

Search for the decay $K^{+} \to π^{+} ν ν ˉ$ in the momentum region $P_{π} < 195 MeV/c$

E787 Collaboration

We have searched for the decay $K^{+} \to π^{+} ν ν ˉ$ in the kinematic region with pion momentum below the $K^{+} \to π^{+} π^{0}$ peak. One event was observed, consistent with the backgro…

hep-ex2001★ 140 cited

Further Evidence for the Decay K+ to pi+ neutrino-antineutrino

E787 Collaboration

Additional evidence for the rare kaon decay K+ to pi+ neutrino-antineutrino has been found in a new data set with comparable sensitivity to the previously reported result. One new…

hep-ex2001★ 5 cited

Search for the rare decay K+ -> pi+ gamma

E787 Collaboration

We have performed a search for the angular-momentum forbidden decay K+ -> pi+ gamma with the E787 detector at BNL. No events were observed in the pi+ kinematic region around 227 Me…

hep-ex2000★ 21 cited

Search for the Decay K+ -> pi+ pi0 nu nubar

E787, :, S. Adler +45

The first search for the decay K^+ -> pi^+ pi^0 nu nubar has been performed with the E787 detector at BNL. Based on zero events observed in the kinematical search region defined by…

hep-ex2000★ 14 cited

Measurement of Direct Photon Emission in K^+ -> pi^+ pi^0 gamma Decay

E787 Collaboration

We have performed a measurement of the K^+ -> pi^+ pi^0 gamma decay and have observed 2 X 10^4 events. The best fit to the decay spectrum gives a branching ratio for direct photon…

hep-ex1997★ 135 cited

Evidence for the Decay K+ --> pi+ nu anti-nu

E787 Collaboration, S. Adler

An event consistent with the signature expected for the rare kaon decay K+ --> pi+ nu anti-nu has been observed. In the pion momentum region examined, 211<P<230 MeV/c, the backgrou…

Search for the KL​→π0ννˉ Decay at the J-PARC KOTO Experiment

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

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

Search for the decay KL0​→3γ

Measurement of the K+ -> pi0 mu+ nu_mu gamma Branching Ratio

Experimental study of the decay KL0​→π0ννˉ

Search for a light pseudoscalar particle in the decay KL0​→π0π0X

Measurement of the K+→π+ννˉ Branching Ratio

New results and Possibilities in K Physics

First search for KL​→π0π0ννˉ

Search for the decay K+→π+ννˉ in the momentum region Pπ​<195 MeV/c

Further Evidence for the Decay K+ to pi+ neutrino-antineutrino

Search for the rare decay K+ -> pi+ gamma

Search for the Decay K+ -> pi+ pi0 nu nubar

Measurement of Direct Photon Emission in K^+ -> pi^+ pi^0 gamma Decay

Evidence for the Decay K+ --> pi+ nu anti-nu

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

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

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

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

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

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

Search for the decay $K_{L}^{0} \to 3 γ$

Experimental study of the decay $K_{L}^{0} \to π^{0} ν ν ˉ$

Search for a light pseudoscalar particle in the decay $K_{L}^{0} \to π^{0} π^{0} X$

Measurement of the $K^{+} \to π^{+} ν ν ˉ$ Branching Ratio

First search for $K_{L} \to π^{0} π^{0} ν ν ˉ$

Search for the decay $K^{+} \to π^{+} ν ν ˉ$ in the momentum region $P_{π} < 195 MeV/c$