Symmetry in Nuclear, Elementary Particle and High-Energy Physics

Dear Colleagues,

Symmetries in the physics of elementary particles have started to play an increasingly important role in recent years, including in identifying resonances and in evaluating experimental data themselves. This is because understanding the resonance spectrum, both meson and baryon, is crucial in testing the Standard Model. It is about documenting the spectrum of “classic” hadrons (two or three quark systems) and looking for new so-called exotic states, e.g., four- and five-quark systems or quark–gluon hybrids, which can confirm or go beyond the Standard Model. After the discovery of the Higgs boson, these searches are now of the highest level of interest for theoretical physicists and experimentalists. The entire community of physicists eagerly awaits any information in this field. As the experimental signal from exotic states often occurring close to the classical ones is difficult to detect, errors in the existing experimental data and their frequent ambiguities prevent the detection of new states. As has been shown in many articles from the last dozen or so years, this problem can be eliminated by referring to amplitude symmetry. It also enables the elimination of inappropriate experimental data sets. The use of symmetry in the analysis of the amplitudes of light mesons has given such good and confirmed results that it has resulted in the change of parameters of some mesons around 1 GeV even in the Elementary Particle Tables.

The task of the present Special Edition is to draw the attention of the entire community of physicists to the role of symmetry in both the analysis of amplitudes and in the work on the obtained experimental data in all currently working and planned laboratories. It is also important to show how the analysis of theoretically imposed symmetries on the amplitudes of interactions has a large and unambiguous impact on the obtained results. It is important to convince physicists that the use of theoretical symmetries determines the method of data analysis and models for the next decades and increases their accuracy and uniqueness.

Feel free to submit applications (scientific and review articles) covering a wide range of topics in the field of symmetry in the interactions of elementary particles.

Prof. Dr. Robert Kamiński
Guest Editor

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• Unitarity and amplitude modeling
• Crossing symmetry
• Symmetry breaking
• Ambiguities in hadron–hadron interactions
• Analytical structure of amplitudes