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

We present a calculation of the $\gamma d \to K^+ K^- n p $ reaction with theaim of seeing if the experimental peak observed in the $K^+ n$ invariant massaround 1526 MeV, from where evidence for the existence of the $\Theta^+$ hasbeen claimed, can be obtained without this resonance as a consequence of theparticular dynamics of the process and the cuts applied in the experimental setup. We find that a combination of facts leads indeed to a peak around 1530 MeVfor the invariant mass of $K^+ n$ without the need to invoke any new resonancearound this energy. This, together with statistical fluctuations that we proveto be large with the statistics of the experiment, is likely to produce thenarrower peak observed there.

Study of the $\gamma d\to K^{+}K^{-}np$ reaction and an alternative explanation for the "$\Theta^{+}(1540)$ pentaquark" peak