• Open Access

Effects of N(2000)5/2+ on γpK+Λ(1405)

Yu Zhang and Fei Huang
Phys. Rev. C 103, 025207 – Published 25 February 2021

Abstract

The photoproduction reaction of γpK+Λ(1405) is investigated based on an effective Lagrangian approach at the tree-level approximation with the purpose of understanding the reaction mechanism and extracting the resonance contents and the associated resonance parameters in this reaction. Apart from the t-channel K and K* exchanges, s-channel nucleon (N) exchange, u-channel Σ, Λ, and Λ(1405) exchanges, and generalized contact term, the exchanges of a minimum number of N resonances in the s channel are taken into account in constructing the reaction amplitudes to describe the experimental data. It is found that by introducing the N(2000)5/2+ resonance exchange in the s channel, one can reproduce the most recent differential cross-section data from the CLAS Collaboration quite well. Further analysis shows that the cross sections of γpK+Λ(1405) at high energies are dominated by the t-channel K exchange, while the contributions from the s-channel N and N(2000)5/2+ exchanges are rather significant to the cross sections in the near-threshold energy region. Predictions for the beam and target asymmetries for γpK+Λ(1405) are given.

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  • Received 7 March 2020
  • Accepted 11 February 2021

DOI:https://doi.org/10.1103/PhysRevC.103.025207

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Nuclear PhysicsParticles & Fields

Authors & Affiliations

Yu Zhang and Fei Huang*

  • School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 101408, China

  • *Corresponding author: huangfei@ucas.ac.cn

Article Text

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Issue

Vol. 103, Iss. 2 — February 2021

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