Speaker
Description
Study of a chiral symmetry in QCD attract wide interests to study the QCD phase diagram. It is theoretically predicted that the chiral symmetry is partially restored at a finite density matter and it can be observed as modifications of vector meson mass spectra. An experiment is being performed at J-PARC to measure mass modifications of vector mesons in a nucleus, which can be considered as a finite baryon density matter. The experiment measures electron-positron decays of vector mesons.
The previous experiment which was performed at KEK-PS shows significant mass modifications in nuclei and the new experiment aims to collect 50 times larger statistics than that of the KEK-PS experiment.
The experiment started constructions of the spectrometer in 2019 and performed acquisitions of pilot-data in 2020 and 2021. In this contribution, the status of the experiment and the performance of the spectrometer will be reported.
| Theory / experiment | Experiment |
|---|---|
| Group or collaboration name | J-PARC E16 collaboration |
