Электронный каталог

Статья

Acharya, S.
Exploring the Strong Interaction of Three-Body Systems at the LHC / S.Acharya, B.Batyunya, C.Ceballos Sanchez, R.A.Diaz, S.Grigoryan, A.Kondratyev, L.Malinina, K.Mikhaylov, P.Nomokonov, V.Pozdniakov, E.Rogochaya, A.Vodopyanov, [ALICE Collab.] // Physical Review X [Electronic resource]. – 2024. – Vol. 14, No. 3. – P. 031051. – URL: https://doi.org/10.1103/PhysRevX.14.031051. – Bibliogr.: 81.

Deuterons are atomic nuclei composed of a neutron and a proton held together by the strong interaction. Unbound ensembles composed of a deuteron and a third nucleon have been investigated in the past using scattering experiments, and they constitute a fundamental reference in nuclear physics to constrain nuclear interactions and the properties of nuclei. In this work, 𝐾+−𝑑 and 𝑝−𝑑 femtoscopic correlations measured by the ALICE Collaboration in proton-proton (𝑝⁢𝑝) collisions at √𝑠=13  TeV at the Large Hadron Collider (LHC) are presented. It is demonstrated that correlations in momentum space between deuterons and kaons or protons allow us to study three-hadron systems at distances comparable with the proton radius. The analysis of the 𝐾+−𝑑 correlation shows that the relative distances at which deuterons and protons or kaons are produced are around 2 fm. The analysis of the 𝑝−𝑑 correlation shows that only a full three-body calculation that accounts for the internal structure of the deuteron can explain the data. In particular, the sensitivity of the observable to the short-range part of the interaction is demonstrated. These results indicate that correlations involving light nuclei in 𝑝⁢𝑝 collisions at the LHC will also provide access to any three-body system in the strange and charm sectors.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 323 в - Задачи 3-4-х тел. Обратная задача рассеяния. Нестабильные частицы