Resonances and final-state interactions in the reaction pp → pK+Λ

Abstract

A study of the strangeness production reaction pp→pK + Λ for excess energies of ǫ ≤ 150 MeV, accessible at high-luminosity accelerator facilities like COSY, is presented. Methods to analyze the Dalitz plot distribution and angular spectra in the Jackson and helicity frames are worked out and suitable observables for extracting information on low lying resonances that couple to the KΛ system and for determining the Λp effective-range parameters from the final state interaction are identified and discussed. Furthermore, the chances for identifying the reaction mechanism of strangeness production are investigated. PACS. 13.75.Ev Hyperon-nucleon interactions -13.75.Gx Pion-baryon interactions -13.75.Jz Kaon-baryon interactions -14.20.Gk Baryon resonances with S=0 -25.40.Ny Resonance reactions

Role of theΛc+(2940)in theπXie1, Dong2, Cao3 2015Phys. Rev. D420270View full textAdd to dashboardCite

“…We study the π − p → D − D 0 p reaction within an effective Lagrangian approach, which has been extensively applied to the study of scattering processes [11][12][13][14][15][16][17][18][19][20][21][22][23] …”

Nucleon resonances in theγp→ϕK+Λreaction near threshold

“…We study the γp → φK + Λ reaction near threshold within an effective Lagrangian approach and the isobar model, which has been extensively applied to the study of scattering processes [26][27][28][29][30][31][32][33][34][35][36][37]. The basic tree level Feynman diagrams for the γp → φK + Λ reaction are depicted in Fig.…”

Reexamination of the role of theΔ*resonances in thepp→nK+Σ+reaction

“…Analogy to the pΛ FSI in pp → pK + Λ reaction [42], we take the same formular to depict the T nΣ as used in Ref. [23]:…”

“…Adjusting our numerical calculations to the experiment data and also referring the pΛ interaction in pp → pK + Λ reaction [42], the values of the α and β are chose to be, α = −70 MeV , β = 280 MeV .…”