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Kaon spectrum revisited: bound states of high energy and spin

  • Regular Article - Theoretical Physics
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Abstract

The European Organization for Nuclear Research (CERN) has recently approved a world-unique QCD facility in which an updated version of the external M2 beam line of the CERN SPS in conjunction with a universal spectrometer of the COMPASS experiment is used. One of its main goals is to use highly intense and energetic kaon beams to map out the complete spectrum of excited kaons with an unprecedented precision; having a broad impact not only on low-energy QCD phenomenology, but also on many high-energy particle processes where excited kaons appear, such as the study of CP violation in heavy-meson decays studied at LHCb and Belle II. In support of the experimental effort, the kaon spectrum is computed herein using a constituent quark model which has been successfully applied to a wide range of hadronic observables, from light to heavy quark sectors, and thus the model parameters are completely constrained. The model’s prediction can be used as a template against which to compare the already collected data and future experimental findings, in order to distinguish between conventional and exotic kaon states. We also compare our results with those available in the literature in order to provide some general statements, common to all calculations.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: All information necessary to reproduce the results described herein is contained in the material presented above.]

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Acknowledgements

This work has been partially funded by EU Horizon 2020 research and innovation program, STRONG-2020 project, under Grant agreement no. 824093; Ministerio Español de Ciencia e Innovación, Grant no. PID2019-107844GB-C22 and PID2019-105439GB-C22; and Junta de Andalucía, contract nos. P18-FR-5057 and Operativo FEDER Andalucía 2014-2020 UHU-1264517.

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Authors and Affiliations

  1. Departamento de Física Fundamental, Universidad de Salamanca, 37008, Salamanca, Spain

    U. Taboada-Nieto, P. G. Ortega, D. R. Entem & F. Fernández

  2. Instituto Universitario de Física Fundamental y Matemáticas, Universidad de Salamanca, 37008, Salamanca, Spain

    U. Taboada-Nieto, P. G. Ortega, D. R. Entem & F. Fernández

  3. Departamento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, 41013, Seville, Spain

    J. Segovia

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  1. U. Taboada-Nieto
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  2. P. G. Ortega
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  3. D. R. Entem
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  4. F. Fernández
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Correspondence to J. Segovia.

Additional information

Communicated by E. Oset.

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Taboada-Nieto, U., Ortega, P.G., Entem, D.R. et al. Kaon spectrum revisited: bound states of high energy and spin. Eur. Phys. J. A 59, 40 (2023). https://doi.org/10.1140/epja/s10050-023-00963-3

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