English

Resonance interpretation of the bump structure in the $\gamma p \to K^+ \Lambda(1520)$ differential cross section

Nuclear Theory 2015-05-28 v2 High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Experiment

Abstract

We investigate the Λ(1520)\Lambda(1520) photoproduction in the γpK+Λ(1520)\vec{\gamma} p \to K^+ \Lambda(1520) reaction within the effective Lagrangian method near threshold. In addition to the "background" contributions from the contact, tt-channel KK exchange, and ss-channel nucleon pole terms, which were already considered in previous works, the contribution from the nucleon resonance N(2080)N^*(2080) (spin-parity JP=3/2J^P = 3/2^-) is also considered. We show that the inclusion of the nucleon resonance N(2080)N^*(2080) leads to a fairly good description of the new LEPS differential cross-section data, and that these measurements can be used to determine some of the properties of this latter resonance.

Keywords

Cite

@article{arxiv.1107.5403,
  title  = {Resonance interpretation of the bump structure in the $\gamma p \to K^+ \Lambda(1520)$ differential cross section},
  author = {Ju-Jun Xie and J. Nieves},
  journal= {arXiv preprint arXiv:1107.5403},
  year   = {2015}
}

Comments

4 pages, 2 figures. Proceeding for NSTAR 2011. One typo corrected