First study of the two-body scattering involving charm hadrons

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초록

This article presents the first measurement of the interaction between charm hadrons and nucleons. The two-particle momentum correlations of pD(-) and (p) over barD(+) pairs are measured by the ALICE Collaboration in high-multiplicity pp collisions at root s = 13 TeV. The data are compatible with the Coulomb-only interaction hypothesis within (1.1-1.5)sigma. The level of agreement slightly improves if an attractive nucleon (N)(D) over bar 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) over bar state f(0,I=0)(-1) is an element of[-0.4, 0.9] fm(-1), assuming negligible interaction for the isospin I = 1 channel.

키워드

PARTIAL-WAVE ANALYSISNUCLEON-SCATTERINGPP COLLISIONSFEMTOSCOPYEXCHANGEBARYONSMESONS
제목
First study of the two-body scattering involving charm hadrons
저자
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DOI
10.1103/PhysRevD.106.052010
발행일
2022-09
유형
Article
저널명
Physical Review d
106
5