Beyond scattering and hypernuclei experiments: $p-\Lambda$ and $p-\Sigma^0$ correlation studies at ALICE

4 Nov 2019, 17:40
20m
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Quark matter and nuclear astrophysics Poster Session

Speaker

Laura Fabbietti (Technische Universitaet Muenchen (DE))

Description

Recent ALICE results have demonstrated that femtoscopic measurements in pp and p-Pb collisions provide an unprecedented opportunity to study the short range part of the strong interaction.

Femtoscopy is a technique to extract information on the emission source and interaction potential from correlations between particles with low relative momentum. In this talk we will use femtoscopy to study the $p-\Lambda$ and $p-\Sigma^0$ interactions on the scale of the particle emitting source, which is 1 fm or smaller.

Existing data on the $p-\Lambda$ interaction from scattering experiments only probe large energies, and are not sensitive to the opening of the $N-\Sigma$ channel. In this talk we will show that ALICE data from high-multiplicity pp collisions allows us to measure the $p-\Lambda$ correlation function with exceptional precision at low momentum and at the $N-\Sigma$ threshold, and are thus capable of providing quantitative constraints to existing theoretical models, such as chiral effective theory calculations.

Furthermore, no $p-\Sigma^0$ scattering data exist, and as a result the theoretical models are poorly constrained. The ALICE data allow us to perform the first ever measurement of the $p-\Sigma^0$ correlation function and make comparisons to state-of-the-art theoretical models.

Primary author

Laura Fabbietti (Technische Universitaet Muenchen (DE))

Presentation Materials

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