# Quark Matter 2019 - the XXVIIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions

3-9 November 2019
Wanda Reign Wuhan Hotel
Asia/Shanghai timezone

## 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

### 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

There are no materials yet.