- By:
- Bock, Friederike ; Schmidt, Nicolas V; Read Jr, Kenneth F; Jonas, Florian ; Novitzky, Norbert ; Loizides, Constantinos A; Schambach, Joachim J; Poghosyan, Martin ; Fasel, Markus ; Cormier, Thomas M; Glimos, Ewa
- Journal Name:
- Physical Review D
- Page Number:
- 52010-52010
- Volume:
- 106
- Issue Number:
- 5
- Publication Date:
- October 28, 2022
- View DOI Listing:
- https://doi.org/10.1103/PhysRevD.106.052010
Abstract
This article presents the first measurement of the interaction between charm hadrons and nucleons. The two-particle momentum correlations of pD− and ¯pD+ pairs are measured by the ALICE Collaboration in high-multiplicity pp collisions at √s=13  TeV. The data are compatible with the Coulomb-only interaction hypothesis within (1.1–1.5)σ. The level of agreement slightly improves if an attractive nucleon (N)¯D strong interaction is considered, in contrast to most model predictions which suggest an overall repulsive interaction. This measurement allows for the first time an estimation of the 68% confidence level interval for the isospin I=0 inverse scattering length of the N¯D state f−10,I=0∈[−0.4,0.9]  fm−1, assuming negligible interaction for the isospin I=1 channel.
