Measurement of single electrons from semileptonic charm and bottom hadron decays in Au + Au collisions at RHIC-PHENIX
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Asia/Tokyo
201 (RIBF Hall)
201
RIBF Hall
Description
=Date and Place=
Oct. 11th(Tue.), 13:30~ at RIBF Hall(201)
=Lecturer=
Dr.Takashi Hachiya
(RIKEN BNL Research Center)
=Title=
Measurement of single electrons from semileptonic charm and bottom hadron decays in Au + Au collisions at RHIC-PHENIX
=Abstract=
A quark-gluon plasma (QGP) is a state of matter in which quarks and gluons are deconfined under extremely hot and dense conditions. QGP can be created in high energy heavy ion collision. Heavy quark is a clean probe to study the characteristics of QGP.
In the previous PHENIX measurement, a strong suppression of
single electrons from semileptonic decays of heavy quark hadrons
including charms and bottoms at high pT has been observed. To further understand the heavy quark suppressions, PHENIX installed the silicon vertex detector (VTX) which allows us to measure the bottom and charm contributions separately from the measurement of displaced tracks. For the first time, the relative contributions from charm and bottom hadrons to these electrons are measured in Au + Au collisions. By comparing the fraction in p + p collisions, we find that electrons from bottom hadron decays are less suppressed than those from charm for the region 3 < pT < 4 GeV/c.
In this talk, these results will be discussed and compared with theoretical calculations.
