Spectroscopy of eta'-nucleus bound states at GSI-SIS
Hiroyuki Fujioka, Kenta Itahashi, Hans Geissel, Ryugo S. Hayano,, Satoru Hirenzaki, Satoshi Itoh, Daisuke Jido, Volker Metag, Hideko Nagahiro,, Mariana Nanova, Takahiro Nishi, Kota Okochi, Haruhiko Outa, Ken Suzuki,, Takatoshi Suzuki, Yoshiki K. Tanaka, Helmut Weick
TL;DR
This paper discusses the potential formation and detection of eta'-nucleus bound states through missing-mass spectroscopy at GSI-SIS, which could reveal in-medium modifications of the eta' meson related to chiral symmetry restoration.
Contribution
It proposes a novel experimental approach to observe eta'-nucleus bound states via missing-mass spectroscopy using the 12C(p,d) reaction at GSI-SIS.
Findings
Potential observation of bound states if decay width is narrow
Method to detect in-medium eta' mass modifications
Feasibility of inclusive measurement for bound state detection
Abstract
The eta' meson mass may be reduced due to partial restoration of chiral symmetry. If this is the case, an eta'-nucleus system may form a nuclear bound state. We plan to carry out a missing-mass spectroscopy with the 12C(p,d) reaction at GSI-SIS. Peak structures corresponding to such a bound state may be observed even in an inclusive measurement, if the decay width is narrow enough.
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