Analysis of the Lambda p Final State Interaction in the Reaction p+p->K^+(Lambda p)

Abstract

The missing mass spectrum measured in high resolution studies of the reaction pp -> K^+X is analyzed with respect to the strong final state interaction near the Lambda p production threshold. The observed spectrum can be described by factorizing the reaction amplitude in terms of a production amplitude and a final state scattering amplitude. Parametrizing the Lambda p final state interaction in terms of the inverse Jost function allows a direct extraction of the low-energy phase-equivalent potential parameters. Constraints on the singlet and triplet scattering lengths and effective ranges are deduced in a simultaneous fit of the Lambda p invariant mass spectrum and the total cross section data of the free Lambda p scattering using the effective range approximation.

9 pages,6 figures, 2 tables

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Cited by in corpus (16)

• Near threshold enhancement of the ppbar mass spectrum in J/Psi decay
• Decay width of $d^{\ast }(2380)\to NN\pi \pi$ processes
• High resolution study of the Lambda p final state interaction in the reaction p + p -> K+ + (Lambda p)
• Implications of an increased $\Lambda$-separation energy of the hypertriton
• Extraction of scattering lengths from final-state interactions
• Role of the possible ${\Sigma }^{\ast }({\frac{1}{2}}^{-})$ state in the $\Lambda p\to \Lambda p{\pi }^0$ reaction
• Phenomenology of the Lambda/Sigma^0 production ratio in pp collisions
• Cross section of the $pp\to K^{+}{\Sigma }^{+}n$ reaction close to threshold
• Chiral Corrections to Hyperon Axial Form Factors
• Testing the nature of the $\Lambda (1520)$ resonance in proton-induced production
• Exploring the ${\Sigma }^{+}p$ interaction by measurements of the correlation function
• The pp -> K^+Sigma^+n cross section from missing mass spectra
• The pp->p Lambda K+ and pp->p Sigma0 K+ reactions with chiral dynamics
• Lambda-N scattering length from the reaction gamma d -> K^+ Lambda n
• Upper limits for a narrow resonance in the reaction p + p -> K^+ + (Lambda p)
• Spin and Isospin Effects in the NN -> NK Lambda Reaction Near Threshold