Hiroyuki Kusumoto

TL;DR: In this article, a high statistics measurement of the π0 spectra from p p annihilation at rest was carried out using modularized NaI(Tl) detectors, and three narrow peaks at 2 σ levels were seen at approximately the same masses as in the previous measurement of p p → γ B.

TL;DR: In this article, an inclusive γ ray spectrum in pp annihilation at rest has been measured with modularized NaI(Tl) detectors with statistics several times higher than before.

TL;DR: In this paper, a modularized array of NaI(Tl) detectors in a half barrel configuration is presented, where 96 NaI modules are surrounded by a layer of 48 modules of scintillating glass.

TL;DR: The measurement was done with statistics several times as high as those of earlier experiments by using modularized NaI(Tl) detectors and has not observed any narrow states, i.e., baryonium candidates, with statistical significance higher than 4sigma.

TL;DR: In this article, a highly sensitive experiment with good statistics has been carried out at KEK by using an antiproton beam, deuterium target, and time-of-flight counter together with a modularized NaI(Tl) detector.