arXiv subjects

Kirill Filimonov

Publications and source records attributed to Kirill Filimonov.

3 recordsLinked to original sources

arXiv2005

High $p_T$ correlations of $γ$ and charged hadrons at RHIC

Prompt photon production in ultra-relativistic heavy-ion collisions provides a calibrated probe for the study of the properties of high energy density QCD matter. Especially interesting are the measurements of $γ$-tagged jets where the hard scattering scale is known and can be used to determine the partonic energy loss in the dense matter. We discuss the potential of $γ$-jet measurements at the Relativistic Heavy Ion Collider (RHIC) and argue that the observed supression of the away-side correlations for di-jet production in central Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV should significantly reduce the backgrounds for the $γ$-jet coincidence measurements.

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arXiv2004

Dihadron correlations at high pT

Jet quenching in the matter created in high energy nucleus-nucleus collisions provides a tomographic tool to probe the medium properties. Recent experimental results from the Relativistic Heavy-Ion Collider (RHIC) on characterization of jet production via dihadron correlations at high transverse momentum are reviewed. Expectations from the dihadron measurements for the lower energy \sqrtsNN=62.4 GeV RHIC run are discussed.

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arXiv2001

Low-Mass Lepton Pair Production in Pb-Au Collisions at 40 AGeV

The CERES/NA45 experiment at the CERN SPS has previously measured $e^{+}e^{-}$ pair production in 160 AGeV Pb-Au collisions. In the mass region m>0.2 GeV/c$^{2}$, an enhancement of $2.7\pm0.4(statist.)\pm0.5(syst.)$ compared to the expectation from known hadronic decay sources was observed. In the 40 AGeV data taken in 1999, an enhancement is again found; a preliminary analysis gives the even larger value of $4.5\pm1.2(statist.)$. The results are compared to theoretical model calculations based on $π^{+}π^{-}$ annihilation with a modified $ρ$-propagator.

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