Effects of $N(2000){5/2}^+$ on $\gamma p \to K^+ \Lambda(1405)$ - INSPIRE

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Effects of $N(2000){5/2}^+$ on $\gamma p \to K^+ \Lambda(1405)$

Yu Zhang
(
- Beijing, GUCAS
)
,
Fei Huang
(
- Beijing, GUCAS
)

Feb 20, 2021

7 pages

Published in:

Phys.Rev.C 103 (2021) 2, 025207

Published: Feb 25, 2021

e-Print:

2102.10404 [hep-ph]

DOI:

10.1103/PhysRevC.103.025207

View in:

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Abstract: (APS)

The photoproduction reaction of γp→K+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 γp→K+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 γp→K+Λ(1405) are given.

Note:

8 pages, 6 figures; typos corrected; version published in Phys. Rev. C. arXiv admin note: text overlap with arXiv:2002.04213

Hadronic Physics and QCD
Lambda(1405): exchange
Lambda: exchange
K: exchange
K*(892): exchange
target: asymmetry
beam: asymmetry
energy: high
differential cross section
quantum chromodynamics

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