Tohoku University · Physics and Astronomy
Professor K. Miwa's research lab specializes in experimental hadron physics, focusing on strangeness physics and the study of baryon resonances using high-energy hadron beams. The lab conducts precision measurements of hyperon and baryon reactions, such as Σ⁻p→Λn and K⁺p→π⁺X, to explore the structure of baryons and search for exotic states like the Θ⁺ pentaquark. Their work primarily utilizes high-intensity beams at facilities like J-PARC and KEK, emphasizing accurate differential cross section measurements and missing mass spectroscopy. The lab contributes significantly to understanding the strong interaction dynamics in the baryon sector through high-precision experimental techniques and data analysis.
Figures are computed from collected data and may differ slightly.
International audience
The differential cross sections of the Σ^{-}p→Λn reaction were measured accurately for the Σ^{-} momentum (p_{Σ}) ranging from 470 to 650 MeV/c at the J-PARC Hadron Experimental Facility. Precise angular information about the Σ^{-}p→Λn reaction was obtained for the first time by detecting approximately 100 reaction events at each angular step of Δcosθ=0.1. The obtained differential cross sections show a slightly forward-peaking structure in the measured momentum regions. The cross sections integ
The ${\ensuremath{\Theta}}^{+}$ was searched for via the ${K}^{+}p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}X$ reaction using the 1.2 GeV/$c$ ${K}^{+}$ beam at the K6 beam line of the KEK-PS 12 GeV Proton Synchrotron. In the missing mass spectrum of the ${K}^{+}p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}X$ reaction, no clear peak structure was observed. Therefore a 90% C.L. upper limit of 3.5 \ensuremath{\mu}b/sr was derived for the differential cross section averaged over ${2}^{\ifmmode
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