English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Excitation-energy spectra of $^{11}$C nuclei near the $\eta^\prime$-mesonproduction threshold have been measured by missing-mass spectroscopy using the$^{12}$C($p$,$d$) reaction. A carbon target has been irradiated with a 2.5 GeVproton beam supplied by the synchrotron SIS-18 at GSI to produce $\eta^\prime$meson bound states in $^{11}$C nuclei. Deuterons emitted at $0^\circ$ in thereaction have been momentum-analyzed by the fragment separator (FRS) used as ahigh-resolution spectrometer. No distinct structure due to the formation of$\eta^\prime$-mesic states is observed although a high statistical sensitivityis achieved in the experimental spectra. Upper limits on the formation crosssections of $\eta^\prime$-mesic states are determined, and thereby a constraintimposed on the $\eta^\prime$-nucleus interaction is discussed.

Missing-mass spectroscopy of the ${}^{12}{\rm C}(p,d)$ reaction near the $\eta^\prime$-meson production threshold