Quark Matter 2012

Session

Parallel 5C: High pt and Jets (Chair B. Cole)

110

16 Aug 2012, 14:00

59. Systematic Monte-Carlo studies of dijets at the LHC and RHIC

Christopher Coleman-Smith (Duke Physics)

16/08/2012, 14:00

Jets

Oral Presentation

Recent results from Pb+Pb collisions at the LHC have shown evidence of dramatic medium modification of di-jets. Although asymmetric di-jets are also seen in p+p collisions, di-jets with a large energy asymmetry are found much more often in Pb+Pb collisions. E.g., events with a 200 GeV leading jet and a 80 GeV subleading jet were frequently observed. The increase in the average energy asymmetry...

401. Production of Charged Pions, Kaons, and Protons in 2.76 TeV Pb-Pb Collisions at high p_t measured with the ALICE Experiment.

Antonio Ortiz Velasquez (Lund University (SE))

16/08/2012, 14:20

Oral Presentation

The main tracking detector in the central barrel ($|\eta |<1$) of the ALICE experiment is the Time Projection Chamber. In addition to charged particle tracking it provides particle identification (PID) through the measurement of the specific energy loss, $dE/dx$. At low momentum ($p<1$ GeV/c), pions, kaons, and protons can be cleanly separated. Thanks to the relativistic rise of the $dE/dx$,...

492. Charged particle spectra and nuclear modification factor in lead-lead collisions at 2.76 TeV with the ATLAS detector at the LHC.

Petr Balek (Charles University (CZ))

16/08/2012, 14:40

Oral Presentation

The measurement of charged particle spectra in heavy ion collisions is a direct way to study properties of hot and dense matter created in these interactions. The centrality dependence of the spectral shape is an important tool to understand the energy loss mechanism. The ATLAS detector at the LHC accumulated 150µb-1 of lead-lead data at 2.76 TeV per nucleon-nucleon pair. Due to the excellent...

249. R_CP and R_AA Measurements of Identified and Unidentified Charged Particles at High p_T in Au+Au Collisions at 7.7, 11.5, 19.6, 27, 39, and 62.4 GeV in STAR

Evan Sangaline (UC Davis)

16/08/2012, 15:00

Jets

Oral Presentation

The suppression of high $p_T$ hadrons in 200 GeV Au+Au collisions at RHIC has been seen as a signature for a partonic medium being formed. The evolution of this key QGP signature is a powerful tool for studying the QCD phase structure in the RHIC Beam Energy Scan (BES). In this talk, we will present measurements of identified ${\pi }^{\pm }$, $K^{\pm }$, and $p(\overline{p})$ and unidentified charged...

330. Strange hadrons at intermediate and high transverse momentum in p+p, d+Au, Cu+Cu and Au+Au collisions at 200 GeV measured with PHENIX detector

Dr Prashant Shukla (Bhabha Atomic Research Centre (IN))

16/08/2012, 15:20

Oral Presentation

The hadrons containing strange quark(s) are among the most interesting probes of the hot and dense matter produced in heavy ion collisions at Relativistic Heavy Ion Collider (RHIC). While p+p collisions are used as a baseline for comparison with heavier collision systems and provide a cross check for pQCD calculations, d+Au collisions are used to study cold nuclear matter effects for mesons...

348. A Running Coupling Explanation of the Surprisingly Transparency of the QGP at LHC

Alessandro Buzzatti (Columbia University)

16/08/2012, 15:40

Oral Presentation

The CUJET1.0 Monte Carlo Jet Energy loss model is applied to predict the jet flavor, centrality and density dependence of the nuclear modification factor $R_{AA}$ and the elliptic flow $v_2$ at RHIC and LHC. Running coupling effects due to combined $x$, $k_{\perp }$ and $q_{\perp }$ evolution are included for the first time in the dynamical DGLV opacity expansion framework and are shown to provide a...