Chiral unitary models reproduce the measured kaon-proton correlation and give first predictions for pion-Lambda and kaon-Xi-minus correlations using new production-weight methods.
Baryonic resonances close to the Kbar-N threshold: the case of Lambda(1405) in pp collisions
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abstract
We present an analysis of the Lambda(1405) resonance produced in the reaction p+p->Sigma^{pm}+pi^{mp}+K+p at 3.5 GeV kinetic beam energy measured with HADES at GSI. The two charged decay channels Lambda(1405) -> Sigma^{\pm}+pi^{\mp} have been reconstructed for the first time in p+p collisions. The efficiency and acceptance-corrected spectral shapes show a peak position clearly below 1400 MeV/c^2. We find a total production cross section of sigma_{Lambda(1405)}=9.2 +- 0.9 +- 0.7 +3.3-1.0 mub. The analysis of its polar angle distribution suggests that the Lambda(1405) is produced isotropically in the p-p center of mass system.
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Femtoscopic study of the $S=-1$ meson-baryon interaction: $K^-p$, $\pi^-\Lambda$ and $K^+\Xi^-$ correlations
Chiral unitary models reproduce the measured kaon-proton correlation and give first predictions for pion-Lambda and kaon-Xi-minus correlations using new production-weight methods.