https://doi.org/10.1051/epjconf/201920206009
Direct production of χc1 at BESIII
Institute fürKernphysik, Johannes Gutenberg Universität Mainz
* e-mail: guo@uni-mainz.de
Published online: 13 March 2019
The production of resonances in electron-positron annihilation has only been observed for states with quantum numbers JPC = 1−−, while C = +1 resonances appear only among the decay products. The direct production of the 1++ states could happen through two-photon or neutral current. Due to the smallness of the production rate, this process has never been verified experimentally. With the high luminosity and good performance of the BESIII experiment, a search of the direct production of the 1++ state in charmonium region, χc1, is undergoing with dedicated data samples around the χc1 mass. An overview of the data analysis will be presented.
© The Authors, published by EDP Sciences, 2019
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