We extended the measurement of electron pairs to the much higher energies of RHIC, at √sNN = 200 GeV, using the PHENIX detector. With its two-arm geometry, this measurement is particularly challenging. Our group lead the development, design and construction of a state-of-the-art Hadron Blind Detector that significantly improved the rejection of the overwhelming combinatorial background and allowed a reliable measurement of electron pairs.
An enhancement of low-mass dielectrons was observed in Au+Au collisions that could consistently be explained in the same framework of in-medium modification of the rho meson spectral function and chiral symmetry restoration, as in the CERES case.
The group also lead the design and construction of the Pad Chambers PC1, an essential element of the tracking system of the PHENIX detector.
