東北大学 · 物理学・天文学
K. Miwa教授の研究室では、ハドロン物理学の分野において、中間子とバリオンの反応断面積の高精度測定を主なテーマとしています。特に、J-PARCやKEKの加速器を用いた反応実験を通じて、ニュートリノや標高状態（例：Θ⁺）の存在を精密に探索しています。反応断面積の角度分布や微分断面積の測定から、強い相互作用のメカニズムや新しいハドロン状態の理解を進めています。
Figures are computed from collected data and may differ slightly.
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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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