Nucleon pole contribution in the ppppK+K reaction below the ϕ meson threshold

Qi-Fang Lü, Ju-Jun Xie, and De-Min Li
Phys. Rev. C 90, 034002 – Published 8 September 2014

Abstract

Nucleon pole contribution in the ppppK+K reaction below the threshold of the production of the ϕ meson is studied within the effective Lagrangian approach. It is assumed that the Kp final state originates from the decay of the hyperons Λ(1115) and Λ(1405). In addition to the pp final state interaction (FSI) parametrized using the Jost function, we have also considered the K+K FSI with the techniques of the chiral unitary approach, where the scalar mesons f0(980) and a0(980) were dynamically generated. Hence, the contributions from scalar mesons f0(980) and a0(980) occur through the K+K FSI. It is shown that the available experimental data are well reproduced, especially the total cross sections and the invariant mass distributions of pp and K+K. Furthermore, different forms of the couplings (pseudoscalar and pseudovector) for the πNN interaction and different strengths for the proton-proton FSI are also investigated. It is found that the contributions from hyperons Λ(1115) and Λ(1405) are different between these two kinds of couplings. On the other hand, the effects of the proton-proton FSI can be adjusted by the cutoff parameters used in the form factors.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 27 April 2014

DOI:https://doi.org/10.1103/PhysRevC.90.034002

©2014 American Physical Society

Authors & Affiliations

Qi-Fang Lü1, Ju-Jun Xie2,3,4,*, and De-Min Li1,†

  • 1Department of Physics, Zhengzhou University, Zhengzhou, Henan 450001, China
  • 2Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, 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

  • *xiejujun@impcas.ac.cn
  • lidm@zzu.edu.cn

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 90, Iss. 3 — September 2014

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×