CERN Accelerating science

Article
Report number	arXiv:1911.13079
Title	Strange-Meson Spectroscopy at COMPASS
Author(s)	Wallner, S. (Munich, Tech. U.)
Collaboration	COMPASS Collaboration
Publication	2020
Imprint	2019-11-29
Number of pages	5
Note	XVIII International Conference on Hadron Spectroscopy and Structure
In:	18th International Conference on Hadron Spectroscopy and Structure, Guilin, China, 16 - 21 Aug 2019, pp.134-138
DOI	10.1142/9789811219313_0019
Subject category	hep-ph ; Particle Physics - Phenomenology ; hep-ex ; Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN SPS ; NA58
Abstract	COMPASS is a multi-purpose fixed-target experiment at CERN aimed at studying the structure and spectrum of hadrons. It has collected the so far world's largest data set on diffractive production of the $K^-\pi^-\pi^+$ decay, which in principle gives access to all kaon states. We performed an elaborate partial-wave analysis, using model-selection techniques to select the wave set based on a large systematically constructed pool of allowed partial waves. The partial-wave decomposition reveals signals in the mass region of well-known states, such as $K_1(1270)$ and $K_1(1400)$. In addition, we observe potential signals from excited states, such as $K_1(1650)$.
Copyright/License	preprint: (License: arXiv nonexclusive-distrib 1.0)

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