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Roles of a0(980) and a0(1710) in Cabibbo-suppressed process D+→π0π+η

Xiao-Hui Zhang1,2, Jing-Yu Zhu1,*, Li-Juan Liu1,†, and En Wang1,‡

  • 1School of Physics, Zhengzhou University, Zhengzhou 450001, China
  • 2Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, China

  • *Contact author: zhujingyu@zzu.edu.cn
  • †Contact author: liulijuan@zzu.edu.cn
  • ‡Contact author: wangen@zzu.edu.cn
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Phys. Rev. D 112, 074004 – Published 6 October, 2025

DOI: https://doi.org/10.1103/2nqy-k5lq

Abstract

Motivated by the BESIII amplitude analysis of the single Cabibbo-suppressed process D+→π0π+η, we investigate this reaction by taking into account the contributions from the a0(980), ρ, and a0(1710), where the scalar meson a0(980) could be dynamically generated from the S-wave pseudoscalar meson-pseudoscalar meson interaction within the chiral unitary approach. Our theoretical predictions for the π0η, π+η, and π+π0 invariant mass distributions are in agreement with the BESIII measurements, especially the clear peaks around 1 GeV in the π0η and π+η invariant mass distributions could be associated with the dynamically generated state a0(980). Furthermore, we demonstrate that the intermediate a0(1710) is also necessary to describe the enhancement structure around 1.6–1.7 GeV in the π0/+η invariant mass distribution. More precise experimental measurements of this process could provide deeper insights into the nature of the scalar mesons a0(980) and a0(1710).

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Phys. Rev. D 112, 074004– Published 6 October, 2025
  • Received 6 August 2025
  • Accepted 16 September 2025
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