Y. Fujiwara

activity

20112022

K^{-}

p

p

threshold in the in-flight

^{3}

(K^{-}, Λ p) n

reaction

50 citations · 209 across the 9 of their papers we have counts for

collaborators

9 papers

nucl-ex2022★ 18 cited

Pole position of $Λ (1405)$ measured in $d (K^{-}, n) π Σ$ reactions

PARC E31 Collaboration, S. Aikawa, S. Ajimura +74

We measured a set of $π^{\pm} Σ^{\mp}$ , $π^{0} Σ^{0}$ , and $π^{-} Σ^{0}$ invariant mass spectra below and above the $K ˉ N$ mass threshold in $K^{-}$ -induced reactions on deuteron. We deduced th…

nucl-ex2020★ 41 cited

Observation of a $K ˉ N N$ bound state in the $^{3} He (K^{-}, Λ p) n$ reaction

T. Yamaga, S. Ajimura, H. Asano +66

We have performed an exclusive measurement of the $K^{-} +^{3} He \to Λ p n$ reaction at an incident kaon momentum of $1 GeV / c$ .In the $Λ p$ invariant mass spectrum, a…

nucl-ex2018★ 6 cited

" $K^{-} p p$ ", a $K$ -Meson Nuclear Bound State, Observed in $^{3} He (K^{-}, Λ p) n$ Reactions

PARC E15 collaboration, S. Ajimura, H. Asano +67

We observed a distinct peak in the $Λ p$ invariant mass spectrum of $^{3} He (K^{-}, Λ p) n$ , well below the mass threshold of $m_{K} + 2 m_{p}$ . By selecting a relatively large mome…

nucl-ex2016★ 50 cited

Structure near $K^{-}$ + $p$ + $p$ threshold in the in-flight $^{3}$ He $(K^{-}, Λ p) n$ reaction

PARC E15 Collaboration, Y. Sada, S. Ajimura +69

To search for an S= -1 di-baryonic state which decays to $Λ p$ , the $^{3} He (K^{-}, Λ p) n_{mi ss in g}$ reaction was studied at 1.0 GeV/ $c$ . Unobserved neutrons were kinematically ide…

physics.ins-det2014★ 48 cited

Enhancement of muonium emission rate from silica aerogel with a laser ablated surface

G. A. Beer, Y. Fujiwara, S. Hirota +24

Emission of muonium ( $μ^{+} e^{-}$ ) atoms from a laser-processed aerogel surface into vacuum was studied for the first time. Laser ablation was used to create hole-like regions with dia…

physics.atom-ph2013★ 26 cited

Measurement of muonium emission from silica aerogel

P. Bakule, G. A. Beer, D. Contreras +28

Emission of muonium ( $μ^{+} e^{-}$ ) atoms from silica aerogel into vacuum was observed. Characteristics of muonium emission were established from silica aerogel samples with densiti…

physics.ins-det2012★ 18 cited

The K1.8BR spectrometer system at J-PARC

Keizo Agari, Shuhei Ajimura, George Beer +81

A new spectrometer system was designed and constructed at the secondary beam line K1.8BR in the hadron hall of J-PARC to investigate $K ˉ N$ interactions and $K ˉ$ -nuclear bo…

physics.acc-ph2011★ 2 cited

J-PARC MUSE H-line optimization for the g-2 and MuHFS experiments

A. Toyoda, Y. Fujiwara, Y. Fukao +12

Significant deviation of the anomalous magnetic moment value (g-2) observed by the muon g-2 experiment should be confirmed by the other experiment. This value is experimentally det…

physics.ins-det2011

Temperature dependencies of the energy and time resolution of silicon drift detectors

B. K. Wuenschek, Y. Fujiwara, T. Hashimoto +7

The response of silicon drift detectors (SDDs), which were mounted together with their preamplifiers inside a vacuum chamber, was studied in a temperature range from 100 K to 200 K…

Pole position of Λ(1405) measured in d(K−,n)πΣ reactions

Observation of a KˉNN bound state in the 3He(K−,Λp)n reaction

"K−pp", a K-Meson Nuclear Bound State, Observed in 3He(K−,Λp)n Reactions

Structure near K−+p+p threshold in the in-flight 3He(K−,Λp)n reaction