T. Tsunemi

activity

20042018

most citedStudy of the decay K+ => pi+,nu,nubar in the momentum region 140<Ppi<199 MeV/c

333 citations · 1k across the 16 of their papers we have counts for

collaborators

16 papers

nucl-ex2018★ 9 cited

Differential cross section and photon-beam asymmetry for the gamma p -> pi- Delta++(1232) reaction at forward pi- angles for Egamma=1.5-2.95 GeV

H. Kohri, S. H. Shiu, W. C. Chang +46

Differential cross sections and photon-beam asymmetries for the gamma p -> pi- Delta++(1232) reaction have been measured for 0.7<cos(theta)<1 and Egamma=1.5-2.95 GeV at SPring-8/LE…

nucl-ex2017★ 21 cited

Photoproduction of $Λ$ and $Σ^{0}$ hyperons off protons with linearly polarized photons at $E_{γ} = 1.5 - 3.0$ GeV

S. H. Shiu, H. Kohri, W. C. Chang +42

We report the measurement of the $γ p \to K^{+} Λ$ and $γ p \to K^{+} Σ^{0}$ reactions at SPring-8. The differential cross sections and photon-beam asymmetries are meas…

nucl-ex2017★ 17 cited

First measurement of coherent $ϕ$ -meson photoproduction from helium-4 near threshold

LEPS Collaboration, T. Hiraiwa, M. Yosoi +42

The differential cross sections and decay angular distributions for coherent $ϕ$ -meson photoproduction from helium-4 have been measured for the first time at forward angles with li…

nucl-ex2017★ 17 cited

$ϕ$ photoproduction on the proton at $E_{γ}$ = 1.5 - 2.9 GeV

K. Mizutani, M. Niiyama, T. Nakano +53

Differential cross sections at $t = t_{min}$ and decay asymmetries for the $γ p \to ϕp$ reaction have been measured using linearly polarized photons in the range 1.5 to 2…

nucl-ex2017★ 12 cited

Differential cross section and photon beam asymmetry for the gamma p -> pi+ n reaction at forward pi+ angles at Egamma=1.5-2.95 GeV

H. Kohri, S. Y. Wang, S. H. Shiu +46

Differential cross sections and photon beam asymmetries for the gamma p -> pi+ n reaction have been measured for 0.6<cos(theta)<1 and Egamma=1.5-2.95 GeV at SPring-8/LEPS. The cros…

hep-ex2016★ 13 cited

Search for the rare decay $K^{+} \to μ^{+} ν ν ˉ ν$

A. V. Artamonov, B. Bassalleck, B. Bhuyan +57

Evidence of the $K^{+} \to μ^{+} ν ν ˉ ν$ decay was searched for using E949 experimental data with an exposure of $1.70 \times 1 0^{12}$ stopped kaons. The data sample is dominated by the b…

nucl-ex2016★ 21 cited

Interference effect between $ϕ$ and $Λ (1520)$ production channels in the $γ p \to K^{+} K^{-} p$ reaction near threshold

S. Y. Ryu, J. K. Ahn, T. Nakano +69

The $ϕ$ - $Λ (1520)$ interference effect in the $γ p \to K^{+} K^{-} p$ reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between…

hep-ex2014★ 102 cited

Search for heavy neutrinos in $K^{+} \to μ^{+} ν_{H}$ decays

A. V. Artamonov, B. Bassalleck, B. Bhuyan +57

Evidence of a heavy neutrino, $ν_{H}$ , in the $K^{+} \to μ^{+} ν_{H}$ decays was sought using the E949 experimental data with an exposure of $1.70 \times 1 0^{12}$ stopped kaons. With the major…

nucl-ex2013★ 81 cited

Search for $K^{-} pp$ bound state via $γ d \to K^{+} π^{-} X$ reaction at $E_{γ} = 1.5 - 2.4$ GeV

A. O. Tokiyasu, M. Niiyama, J. D. Parker +69

A search for $K^{-} pp$ bound state (the lightest kaonic nucleus) has been performed using the $γ d \to K^{+} π^{-} X$ reaction at E $_{γ}$ =1.5-2.4 GeV at LEPS/SPring-8. The diff…

nucl-ex2013★ 13 cited

Backward-angle photoproduction of $ω$ and $η^{'}$ mesons from protons at $E_{γ} = 1.5 - 3.0$ GeV

Y. Morino, Y. Nakatsugawa, M. Yosoi +47

We report the measurement of differential cross sections for $ω$ and $η^{'}$ photoproduction from protons at backward angles ( $- 1.0 < cos Θ_{C . M}^{X} < - 0.8$ ) using linearly polarized pho…

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★ 333 cited

Study of the decay K+ => pi+,nu,nubar in the momentum region 140<Ppi<199 MeV/c

E949 Collaboration, A. V. Artamonov, B. Bassalleck +60

Experiment E949 at Brookhaven National Laboratory has observed three new events consistent with the decay K+ => pi+,nu,nubar in the pion momentum region 140 < P_pi < 199 MeV/c in a…

physics.ins-det2009★ 28 cited

Effects of radiation damage caused by proton irradiation on Multi-Pixel Photon Counters (MPPCs)

T. Matsumura, T. Matsubara, T. Hiraiwa +9

We have investigated the effects caused by proton-induced radiation damage on Multi-Pixel Photon Counter (MPPC), a pixelized photon detector developed by Hamamatsu Photonics. The l…

hep-ex2008★ 236 cited

New measurement of the K+ => pi+,nu,nubar branching ratio

E949 Collaboration

Three events for the decay K+ => pi+,nu,nubar have been observed in the pion momentum region below the K+ => pi+,pi0 peak, 140 < P_pi < 199 MeV/c, with an estimated background of 0…

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-ex2004★ 142 cited

Improved Measurement of the K+ to pi+ nu nubar Branching Ratio

E949 Collaboration, A. V. Artamonov

An additional event near the upper kinematic limit for K+ to pi+ nu nubar has been observed by Experiment E949 at Brookhaven National Laboratory. Combining previously reported and…

Differential cross section and photon-beam asymmetry for the gamma p -> pi- Delta++(1232) reaction at forward pi- angles for Egamma=1.5-2.95 GeV

Photoproduction of Λ and Σ0 hyperons off protons with linearly polarized photons at Eγ​=1.5−3.0 GeV

First measurement of coherent ϕ-meson photoproduction from helium-4 near threshold

ϕ photoproduction on the proton at Eγ​ = 1.5 - 2.9 GeV