Systematic measurement of quasi-free scattering in \textit{pd} breakup

Space-star anomaly in \textit{Nd }breakup cross section is well known. There were reports on anomaly in quasi-free scattering (QFS) cross section in \textit{nd }breakup reaction. We measured QFS cross section in \textit{pd} breakup reaction, and compared the data with recent \textit{pd} calculations. It was found that experimental QFS cross sections in \textit{nd}/\textit{pd} breakup reaction are higher/lower than calculations, respectively.