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arXiv · 2109.05678

Colour and baryon number fluctuation of preconfinement system in production process and T_cc structure

Yi Jin·Shi-Yuan Li·Yan-Rui Liu·Qin Qin·Zong-Guo Si·Fu-Sheng Yu
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Abstract

We suggest to study the production mechanism and some details of the production properties to probe the structure of the DDpi resonance T_cc^+ recently observed by the LHCb Collaboration. If the resonance is produced as a four-quark state, one can find the corresponding finger prints via measurements on some production properties that are the same as those of Xi_cc. The reason is that a special colour connection on the interface between the perturbative and non perturbative QCD is required for these doubly-charm hadron production. On the other hand, if T_cc^+ is produced as a hadron molecule, the measurement on the momentum correlation of DD^* can be a smoking gun to make the judgement. The present data favour a compact four-quark state production via the cc diquark fragmentation.

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Yi Jin, Shi-Yuan Li, Yan-Rui Liu, Qin Qin, Zong-Guo Si, Fu-Sheng Yu. 2021-09-13. Colour and baryon number fluctuation of preconfinement system in production process and T_cc structure. https://doi.org/10.1103/physrevd.104.114009

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