7-12 June 2021
Europe/Paris timezone

Femtoscopic analysis of $\mathrm{K^0_S-p}$ pairs in proton–proton collisions at $\sqrt{s} = 13$ TeV with ALICE

Jun 10, 2021, 6:45 PM


Experimental poster QCD physics Poster Session


Marta Urioni (Universita di Brescia (IT))


The precise knowledge of the strong interaction between kaons and nucleons
is a key element to describe the interaction between hadrons in the non-perturbative regime of QCD.
Moreover, the knowledge of this interaction plays an important role in the study of the equation
of state of dense baryonic matter, and hence has important implications for the
modeling of neutron stars.

We present the first femtoscopy measurement of momentum correlations of $\mathrm{K^0_Sp}$ and $\mathrm{K^0_S\overline{p}}$ pairs in pp collisions at $\sqrt{s}=13 $ TeV measured by the ALICE experiment at the LHC.
In this study, the strong scattering parameters of $\mathrm{K^0_Sp}$ and $\mathrm{K^0_S\overline{p}}$ pairs are extracted through the Lednicky-Lyuboshitz model. This model links the experimental momentum correlation to the strong final state interaction parameters.
The extracted scattering parameters indicate that the strong interaction between $\mathrm{K^0_Sp}$($\mathrm{\overline{p}}$) is attractive, contrary to $\mathrm{K^+p}$ and $\mathrm{K^-p}$. This indicates that in the $\mathrm{K^0_Sp}$($\mathrm{\overline{p}}$)
there are no resonances below threshold which are responsible of the repulsive strong interaction between $\mathrm{K^-p}$.

Primary author

Marta Urioni (Universita di Brescia (IT))

Presentation materials