Speaker
Description
on behalf of CBM and "QCD at FAIR"
The strong interaction between baryons at low energies is a key ingredient for understanding the emergence of nuclear matter from Quantum Chromodynamics (QCD). Among other topics, the “QCD at FAIR” program at FAIR aims to explore strongly interacting matter with versatile experimental setups, e.g. CBM and HADES, using hadronic and electromagnetic probes, with particular emphasis on strangeness as a tool to access short-range QCD dynamics. Future measurements will provide unique opportunities to constrain baryon-baryon interactions beyond the nucleon-nucleon sector, which are essential for nuclear structure and astrophysical applications.
This contribution focuses on the determination of low-energy scattering parameters such as scattering lengths and effective ranges in baryon–baryon systems using short-ranged production reactions such as $pp\mapsto \Lambda\Lambda K^+K^+$ in the low-GeV energy regime ($\sqrt{s}$=3.6 GeV). Near-threshold hadronic reactions provide indirect but powerful access to final-state interactions in channels where direct scattering data are scarce or unavailable, notably for hyperon–nucleon and hyperon–hyperon systems. This talk addresses the methodological aspects and experimental requirements for such studies with CBM within the “QCD at FAIR” program based on feasibility studies using Monte Carlo simulations, thus highlighting their role in establishing a systematic description of baryon-baryon forces with strangeness. These measurements constitute a key step toward a quantitative understanding of non-perturbative QCD in the baryonic sector and provide essential input for modelling nuclear matter.