Abstract
High intensity secondary beam in J-PARC enables us to perform strangeness nuclear physics programs in order to investigate the baryon–baryon (BB) interactions between the octet baryons. As one of the experiments at the K1.8 beam line, a high statistics \(\varSigma p\) scattering experiment has been performed. The differential cross sections of the \(\varSigma ^{-}p\) elastic scattering for the momentum region from 470 to 850 MeV/c have been successfully measured with an improved accuracy. The statistical error of 10% level was achieved with a fine angular step of \(d\cos \theta = 0.1\) by identifying the largest statistics of about 4500 \(\varSigma ^{-}p\) elastic scattering events from \(1.72 \times 10^{7}\,\varSigma ^{-}\) particles. The differential cross sections show clear forward peaking structure and the forward and backward ratio is large particularly in the higher momentum regions. The accurate data will impose a strong constraint on the theoretical models of the BB interactions.
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Acknowledgements
We would like to thank the staff of the J-PARC accelerator and the Hadron Experimental Facility for their support for providing beam during the beam time. We would also thank the staff of CYRIC and ELPH at Tohoku University for their support to provide beam for the test experiment for our detectors. We would like to express thanks to Y. Fujiwara for the theoretical support from an early period of the experimental design and thank T. A. Rijken and J. Haidenbauer for their theoretical calculations. We also thank KEKCC and SINET4. This work was supported by JSPS KAKENHI Grant Number 23684011, 15H00838, 15H05442, 15H02079 and 18H03693. This work was also supported by Grants-in-Aid Number 24105003 and 18H05403 for Scientific Research from the Ministry of Education, Culture, Science and Technology (MEXT) Japan.
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Miwa, K., for the J-PARC E40 Collaboration. Hyperon–Proton Scattering Experiment and Recent Progress of Strangeness Nuclear Physics at J-PARC. Few-Body Syst 63, 31 (2022). https://doi.org/10.1007/s00601-022-01734-4
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DOI: https://doi.org/10.1007/s00601-022-01734-4