Charged Hadron Suppression at High pT in Au+Au Collisions at 200 GeV

20 May 2014, 16:30
2h
spectrum (darmstadtium)

spectrum

darmstadtium

Board: E-03
Poster Jets Poster session

Speaker

Mr Jason Bryslawskyj (CUNY Baruch)

Description

The nuclear modification factor of single hadrons still provides one of the strongest constraints on energy loss mechanisms in the Quark-Gluon Plasma. Currently the best measurement at RHIC is made with neutral pions. Charged hadrons have independent sources of systematic uncertainty and thus can provide additional constraints. In PHENIX, the background from conversions and weak decays mimicking high $p_{T}$ particles has limited the measurement of charged hadron to $p_{T} < 10$ GeV/$c$. The recently installed silicon vertex tracker (VTX) will be used to reject this background allowing the measurement of charged hadrons out to $20$ GeV/$c$. The VTX is capable of performing precision tracking measurements of distance of closest approach to the primary vertex (DCA). Conversions and weak decays do not originate from the primary vertex and are vetoed with the VTX by rejecting tracks with large DCA. The status of high $p_{T}$ charged tracking and associated nuclear modification factors will be reported.
On behalf of collaboration: PHENIX

Primary author

Mr Jason Bryslawskyj (CUNY Baruch)

Presentation Materials