Odyssey of the Elusive \({\mit \Theta }^+\)
Year: 2025
Type: article
Abstract: \({\mit \Theta }^+\) is a putative light pentaquark state of positive parity with minimal quark content \((uudd\bar {s})\). It naturally emerges in chiral models for baryons, but experimental evidence is uncertain. We review the theoretical foundations of chiral models and their phenomenological applications to exotic states. In particular, we discuss in detail the pentaquark widths with special emphasis on the cancellations occurring in the decay operator. We also discuss some experiments, mainly those whose positive evidence of \({\mit \Theta }^+\) persists to this day. This review is dedicated to Dmitry Diakonov, Victor Petrov, and Maxim Polyakov and their contribution to the \({\mit \Theta }^+\) story. Abstract Published by the Jagiellonian University 2025 authors
Source: Acta Physica Polonica B
Author: M. Praszałowicz
Institution: Jagiellonian University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4409504991