First Model-Independent Measurement of the Spin Triplet $p\Lambda$ Scattering Length from Final State Interaction in the $\vec{p}p\to p{K}^{+}\Lambda$ Reaction

Abstract

The $\vec{p}p\to p{K}^{+}\Lambda$ reaction has been measured with the COSY-TOF detector at a beam momentum of $2.7\mathrm{GeV}/c$. The polarized proton beam enables the measurement of the beam analyzing power by the asymmetry of the produced kaon ($A_N^K$). This observable allows the $p\Lambda$ spin triplet scattering length to be extracted for the first time model independently from the final-state interaction in the reaction. The obtained value is $a_t=(-2.55_{-1.39}^{+0.72}{}_{\text{stat.}}\pm 0.6_{\text{syst.}}\pm 0.3_{\text{theo.}})\mathrm{fm}$. This value is compatible with theoretical predictions and results from model-dependent analyses.

arXiv commentRevised version as accepted for publication in PRC

References in corpus (12)

• Soft-core hyperon-nucleon potentials
• Hyperon Puzzle: Hints from Quantum Monte Carlo Calculations
• Hyperon-nucleon interaction at next-to-leading order in chiral effective field theory
• Updated analysis of NN elastic scattering to 3 GeV
• The Juelich hyperon-nucleon model revisited
• Meson production in nucleon--nucleon collisions close to the threshold
• Ab Initio Description of p-Shell Hypernuclei
• How to extract the $\Lambda N$ scattering length from production reactions
• Influence of N*-resonances on hyperon production in the channel pp->K+ Lambda p at 2.95, 3.20 and 3.30 GeV/c beam momentum
• High resolution study of the Lambda p final state interaction in the reaction p + p -> K+ + (Lambda p)
• Extraction of scattering lengths from final-state interactions
• Final-State Interactions in the Process pp -> pKLambda

Cited by in corpus (11)

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• Determination of N* amplitudes from associated strangeness production in p+p collisions
• Exploring the ${\Sigma }^{+}p$ interaction by measurements of the correlation function
• ${\Sigma }^0$ production in proton nucleus collisions near threshold
• On the structure in the $\Lambda N$ cross section at the $\Sigma N$ threshold
• The legacy of the experimental hadron physics programme at COSY
• Comparison of the pp -> pi+ pn and pp -> pi+ d production rates
• $K^{-}d\to \pi \Lambda N$ reaction with in-flight kaons for studying the $\Lambda N$ interaction
• Phenomenological study of the pp -> pi+ pn reaction