Abstract

In this report one of the methods used for the luminosity determination for the experiment performed by WASA Collaboration to search for 3He-η mesic nuclei is presented. The method is based on the analysis of pd → 3Heη process.

Highlights

  • Strongly bound η- and η -mesic nuclei, being one of the hottest topics in nuclear and hadron physics, have been postulated many years ago [1], until now their existence has not been experimentally confirmed

  • One of the most recent and most promising experiments dedicated to search for η-mesic Helium nuclei has been performed by the WASA-at-COSY Collaboration at the Forschungszentrum Jülich

  • 2 Luminosity determination based on pd → 3Heη with WASA-at-COSY detector

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Summary

Introduction

Strongly bound η- and η -mesic nuclei, being one of the hottest topics in nuclear and hadron physics, have been postulated many years ago [1], until now their existence has not been experimentally confirmed. The search for 3He-η bound states was performed in May 2014 using a ramped proton beam with momentum changing continuously in the range of 1.426-1.635 GeV and pellet deuterium target. The total integrated luminosity and its dependence on the excess energy above the η production threshold was estimated based on the pd → 3Heη process.

Results
Conclusion

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