Jun 26 – 29, 2017
Schloss Waldthausen
Europe/Berlin timezone

Search for the $\chi_{c1}$ charmonium in direct $e^+e^-$ production

Jun 27, 2017, 6:30 PM
1h 30m
Helmholtz-Institut Mainz

Helmholtz-Institut Mainz

Staudingerweg 18, 55128 Mainz
Board: 9


Dr Zhiqing Liu (postdoc)


With the high luminosity accelerator -- BEPCII and the BESIII detector located in Beijing, China, for the first time, we are able to search for a non-vector charmoinum -- the $\chi_{c1}$ state in $e^+e^-$ direct production. In order to investigate the full interference line shape of $\chi_{c1}$ with continuum background, we propose to take data with $e^+e^-$ central-of-mass energy 2 MeV below, exactly at, and 2 MeV above the $\chi_{c1}$ nominal mass. From 14th May to 1st June, and 11th June to 13th June, the BESIII detector successfully accumulated 175 $pb^{-1}$ data at 3508.66 MeV, 175 $pb^{-1}$ data at 3510.66 MeV and 38 $pb^{-1}$ data at 3514.6 MeV. Detailed data analysis is ongoing, and the final results will be released soon.

Primary author

Dr Zhiqing Liu (postdoc)

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