Reexamination of the role of the Δ* resonances in the ppnK+Σ+ reaction

Xiao-Yun Wang, Xu Cao, Ju-Jun Xie, and Xu-Rong Chen
Phys. Rev. C 92, 015202 – Published 8 July 2015

Abstract

In this work, the role of the Δ* resonances in the process of ppnK+Σ+ are systematically investigated with the effective Lagrangian approach and the isobar model. We find that a P31 state, either Δ*(1750) or Δ*(1910) is favored by the data while the P33 state, namely Δ*(1920), has small contribution. Besides, either the subthreshold S31Δ*(1620) resonance or strong nΣ final state interaction or both have a possible contribution at near threshold region, depending on the measured cross sections. We demonstrate the invariant mass distributions and the Dalitz plots in order to investigate whether it is possible to distinguish the controversial KΣ production mechanism in these observables.

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  • Received 21 December 2014
  • Revised 3 June 2015

DOI:https://doi.org/10.1103/PhysRevC.92.015202

©2015 American Physical Society

Authors & Affiliations

Xiao-Yun Wang1,2,3,*, Xu Cao1,3,4,†, Ju-Jun Xie1,3,4,‡, and Xu-Rong Chen1,3

  • 1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Research Center for Hadron and CSR Physics, Institute of Modern Physics of CAS and Lanzhou University, Lanzhou 730000, China
  • 4State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China

  • *xywang@impcas.ac.cn
  • Corresponding author: caoxu@impcas.ac.cn
  • xiejujun@impcas.ac.cn

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Vol. 92, Iss. 1 — July 2015

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