Search for the 4He-η bound state in dd → (4He-η)bound → 3Henπ 0 and dd → (4He-η)bound → 3Hepπ− reactions with the WASA-at-COSY facility

M. Skurzok; W. Krzemien; P. Moskal

doi:10.1051/epjconf/20148102020

EPJ

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Proceedings

Open Access

EPJ Web of Conferences 81, 02020 (2014)
https://doi.org/10.1051/epjconf/20148102020

Search for the ⁴He-η bound state in dd → (⁴He-η)_bound → ³Henπ ⁰ and dd → (⁴He-η)_bound → ³Hepπ⁻ reactions with the WASA-at-COSY facility

M. Skurzok¹^a, W. Krzemien¹ and P. Moskal¹^,2 for the WASA-at-COSY Collaboration

¹ M. Smoluchowski Institute of Physics, Jagiellonian University, Cracow, Poland
² Institut für Kernphysik, Forschungszentrum Jülich, Germany

^a e-mail: magdalena.skurzok@uj.edu.pl

Published online: 26 November 2014

Abstract

In November 2010, the search for the ⁴He-η bound state was performed with high statistics and high acceptance with the WASA-at-COSY facility using a ramped beam technique. The signature of η - mesic nuclei is searched for in the measured excitation functions for the two reaction channels: dd → ³Henπ⁰ and dd → ³Hepπ⁻ near the η production threshold. This report includes the description of the experimental method and the status of the data analysis.

© Owned by the authors, published by EDP Sciences, 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.