6533b82cfe1ef96bd1290066

RESEARCH PRODUCT

Observation of the first iso-spin Charmonium-like State $Z_c(4020)$ }

Qing-ping JiYu-ping GuoAi-qiang GuoChun-xu YuZhi-yong Wang

subject

High Energy Physics - Experiment (hep-ex)FOS: Physical sciencesHigh Energy Physics - Experiment

description

In this paper, we present a new experimental progress in brief on the recent observation of the charged charmonium-like state Z_c(4020)^{+/-} states and its iso-spin partner Z_c(4020)^{0} in pi pi hc process at the BESIII experiment. The charged Z_{c}(4020) is its decay into \pi^{+/-} hc final state, and carries electric charge, thus it contains at least four quarks. The observation of both charge and neutral state makes Z_{c}(4020) the first iso-spin triplet Z_{c} state observed in experiment.

https://dx.doi.org/10.48550/arxiv.1504.02631