G. Beer

activity

19972024

most citedA New Measurement of Kaonic Hydrogen X rays

384 citations · 1.3k across the 28 of their papers we have counts for

collaborators

28 papers

nucl-ex2024

Measurement of the mesonic decay branch of the $K ˉ N N$ quasi-bound state

T. Yamaga, S. Ajimura, H. Asano +67

We conducted measurements of $K^{-} +^{3} He \to π Y N + N^{'}$ reactions using a $1 GeV / c$ $K^{-}$ -beam, with the objective of understanding the broad decay width of $\bar…

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…

physics.ins-det2020

Study of muonium emission from laser-ablated silica aerogel

J. Beare, G. Beer, J. H. Brewer +23

The emission of muonium ( $μ^{+} e^{-}$ ) atoms into vacuum from silica aerogel with laser ablation on its surface was studied with various ablation structures at room temperature using t…

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★ 15 cited

$K$ -series X-ray yield measurement of kaonic hydrogen atoms in a gaseous target

M. Bazzi, G. Beer, G. Bellotti +29

We measured the $K$ -series X-rays of the $K^{-} p$ exotic atom in the SIDDHARTA experiment with a gaseous hydrogen target of 1.3 g/l, which is about 15 times the $ρ_{STP}$ of hy…

Measurement of the mesonic decay branch of the KˉNN quasi-bound state

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