Measurement of low mass dielectrons with the HBD upgrade of PHENIX

作者：Makek M^*

来源：Journal of Physics G: Nuclear and Particle Physics , 2011, 38(12): 124135.

DOI：10.1088/0954-3899/38/12/124135

The PHENIX experiment was upgraded with the Hadron Blind Detector (HBD) for the measurement of low-mass electron pairs. The HBD reduces the combinatorial background by providing additional electron identification in a field-free region close to the vertex and by exploiting the small opening angle of the pi(0) Dalitz and conversion pairs. The HBD was successfully operated during Run 9 and Run 10 at the RHIC in the measurements of e(+)e(-) pairs in p+p and Au+Au collisions, respectively. This paper reports on the present status of the dielectron analysis in Au+Au collisions at root s(NN) = 200 GeV.

• 出版日期2011-12