Garchinger Maier-Leibnitz-Kolloquium: Accessing strong interactions in three-hadron systems at the LHC

by Dr Bhawani Singh ((Physik Department, TUM))

Thursday May 23, 2024, 4:15 PM → 5:15 PM Europe/Berlin

Lecture Hall, ground floor (west) (LMU building, Am Coulombwall 1, campus Garching)

Systems with three hadrons, like unbound ensembles of a deuteron and a hadron, serve as a fundamental reference to constrain nuclear interactions. We present for K^+ –d, p–d as well as triplets of hadrons femtoscopic correlations measured by the ALICE Collaboration in proton–proton (pp) collisions at sqrt{s} = 13 TeV at the LHC. It is demonstrated that correlations in momentum space between deuterons and kaons or protons allow to study three-hadron dynamics at distances of 1 fm and less. The K^+ –d correlation analysis shows that the relative distances at which deuterons and protons/kaons are produced are around 2 fm. The p–d  correlation shows that a comprehensive three-body calculation, accounting for the deuteron's internal structure and short-range nuclear interaction, is crucial in order to explain the observed correlations. The measurements of p–p–p and p–p–Lambda correlations provide insights into the underlying two- and three-body interactions. The three-body effects have been explored using the cumulant method by subtracting pairwise interaction contributions in the measured correlation functions.

Hybrid access via ZOOM:
https://lmu-munich.zoom.us/j/98457332925?pwd=TWc3V1JkSHpyOTBPQVlMelhuNnZ1dz09
Meeting ID: 984 5733 2925
Passcode: 979953

kolloquium-23-05-24.pdf