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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We study the near-threshold photoproduction of $\eta^\prime$ mesons fromnuclei in coincidence with forward going protons in the kinematical conditionsof the Crystal Barrel/TAPS experiment, recently performed at ELSA. Thecalculations have been performed within a collision model based on the nuclearspectral function. The model accounts for both the primary ${\gamma}p \to{\eta^\prime}p$ process and the two-step intermediate nucleon rescatteringprocesses as well as the effect of the nuclear $\eta^\prime$ mean-fieldpotential. We calculate the exclusive $\eta^\prime$ kinetic energydistributions for the $^{12}$C($\gamma$, ${\eta^\prime}p$) reaction fordifferent scenarios of $\eta^\prime$ in-medium modification. We find that theconsidered two-step rescattering mechanism plays an insignificant role in${\eta^\prime}p$ photoproduction off the carbon target. We also demonstratethat the calculated $\eta^\prime$ kinetic energy distributions in primaryphoton--proton ${\eta^\prime}p$ production reveal strong sensitivity to thedepth of the real ${\eta^\prime}$ potential at normal nuclear matter density(or to the ${\eta^\prime}$ in-medium mass shift) in the studied incident photonenergy regime. Therefore, such observables may be useful to help determine theabove ${\eta^\prime}$ in-medium renormalization from the comparison of theresults of our calculations with the data from the CBELSA/TAPS experiment. Inaddition, we show that these distributions are also strongly influenced by themomentum-dependent optical potential, which the outgoing participant protonfeels inside the carbon nucleus. This potential should be taken into account inthe analysis of these data with the aim to obtain information on the${\eta^\prime}$ modification in cold nuclear matter.

Study of in-medium $\eta^\prime$ properties in the ($\gamma$, ${\eta^\prime}p$) reaction on nuclei