Investigation of the Lambda(1405) line shape observed in pp collisions

Abstract

In this work we investigate different possible explanations for the observed low mass Λ(1405) signal associated to the production of the Λ(1405) in p+p reactions at 3.5 GeV beam kinetic energy measured by the HADES collaboration. We study the influence of interference effects between the Λ(1405) resonance and the non-resonant background. Furthermore, we present a phenomenological method to use the HADES data for determining the relative contribution of the two Λ(1405) poles and discuss to which extent the data can constrain the position of these poles in the complex energy plane.

8 pages 7 figures, journal: accepted by PRC

References in corpus (8)

• Effective Kbar N interaction based on chiral SU(3) dynamics
• K^- p scattering length from scattering experiments
• Measurement of the Sigma pi photoproduction line shapes near the Lambda(1405)
• New insights into antikaon-nucleon scattering and the structure of the Lambda(1405)
• Lineshape of the Lambda(1405) Hyperon Measured Through its Sigma0 pion0 Decay
• Differential Photoproduction Cross Sections of the Sigma0(1385), Lambda(1405), and Lambda(1520)
• The role of the $\Lambda (1405)$ in the $pp\to p{K}^{+}\Lambda (1405)$ reaction
• First Observation of the $\Lambda (1405)$ Line Shape in Electroproduction

Cited by in corpus (8)

• QCD and strongly coupled gauge theories: challenges and perspectives
• Constraining the $\overline{\mathrm{K}}\mathrm{N}$ coupled channel dynamics using femtoscopic correlations at the LHC
• Antineutrino induced Lambda(1405) production off the proton
• The role of the triangle singularity in $\Lambda (1405)$ production in the ${\pi }^{-}p\to K^0\pi \Sigma$ and $pp\to p{K}^{+}\pi \Sigma$ processes
• Pole position of $\Lambda (1405)$ measured in $d(K^{-},n)\pi \Sigma$ reactions
• $\Lambda (1405)$ production in the process ${\chi }_{c0}(1P)\to \bar{\Lambda }\Sigma \pi$
• Inclusive Λ production in proton-proton collisions at 3.5 GeV
• Strange Baryonic Resonances and Resonances Coupling to Strange Hadrons at SIS Energies