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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We propose a model-independent analysis of near-threshold enhancements usingindependent S-matrix poles. In this formulation, we constructed a Jost functionwith controllable zeros to ensure that no poles are generated on the physicalRiemann sheet. We show that there is a possibility of misinterpreting theobserved near-threshold signals if one utilized a limited parametrization andrestrict the analysis to only one element of the S-matrix. Specifically, thereis a possibility of the emergence of ambiguous pair of poles which aresingularities of the full S-matrix but may not manifest in one of its elements.For a more concrete discussion, we focused on an effective two-channelscattering where the full S-matrix is a $2\times2$ matrix. We apply our methodto the coupled two-channel analysis of the $P_\psi^N(4312)^+$ and found thatthe compact pentaquark interpretation cannot be ruled out yet.

Interpretation of near-threshold peaks using the method of independent S-matrix poles