Wave-Selection Techniques for Partial-Wave Analysis in Light-Meson Spectroscopy

TL;DR

This paper discusses new wave-selection methods for partial-wave analysis in light-meson spectroscopy, aiming to improve the disentanglement of states in diffractive dissociation data using regularization techniques.

Contribution

It introduces novel wave-selection techniques based on simulated data to enhance partial-wave analysis in light-meson spectroscopy.

Findings

Improved wave-selection methods demonstrated on simulated data.

Regularization techniques are crucial for meaningful partial-wave analysis.

Enhanced ability to identify contributing waves in diffractive dissociation.

Abstract

The light-meson spectrum can be studied by analyzing data from diffractive dissociation of pion or kaon beams. The contributions of the various states that are produced in these reactions are disentangled by the means of partial-wave analysis. A challenge in these analyses is that the partial-wave expansion has to be truncated, i.e. that only a finite subset of the infinitely many partial-wave amplitudes can be inferred from the data. In recent years, different groups have applied regularization techniques in order to determine the contributing waves from the data. However, to obtain meaningful results the choice of the regularization term is crucial. We present our recent developments of wave-selection methods for partial-wave analyses based on simulated data for diffractively produced three-pion events.