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.

First study of the two-body scattering involving charm hadrons / Acharya, S., Adamová, D., Adler, A., Adolfsson, J., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahn, S. U., Ahuja, I., Akbar, Z., Akindinov, A., Al-Turany, M., Alam, S. N., Aleksandrov, D., Alessandro, B., Alfanda, H. M., Alfaro Molina, R., Ali, B., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - ELETTRONICO. - 106:5(2022). [10.1103/PhysRevD.106.052010]

First study of the two-body scattering involving charm hadrons

Agnello, M.;Balbino, A.;Bufalino, S.;Fecchio, P.;Zurlo, N.
2022

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.
File in questo prodotto:
File Dimensione Formato  
PhysRevD.106.052010.pdf

accesso aperto

Descrizione: articolo su rivista
Tipologia: 2a Post-print versione editoriale / Version of Record
Licenza: Creative commons
Dimensione 498.67 kB
Formato Adobe PDF
498.67 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2971696