Charged particle jet measurements with the ALICE experiment in proton-proton collisions at the LHC
نویسنده
چکیده
We present preliminary results of measurements of charged particle jet properties in proton-proton collisions at √ s = 7 TeV using the ALICE detector. Jets are reconstructed using anti − kT, kT and SISCone jet finding algorithms with resolution parameter R = 0.4 in the range of transverse momentum from 20 to 100 GeV/c in the midrapidity region (| η | < 0.5). The uncorrected charged jet spectra obtained using the three different jet finders show good agreement. The data are compared to predictions from PYTHIA-Perugia0, PYTHIAPerugia2011, and PHOJET. The mean charged particle multiplicity in leading jets increases with increasing jet pT and is consistent with model predictions. The radial distributions of transverse momentum about the jet direction and the distributions of the average radius containing 80% of the total jet pT found in the jet cone (R = 0.4 in this analysis), indicate that high pT jets are more collimated than low pT jets.
منابع مشابه
Transverse momentum spectra of charged particles in proton–proton collisions at =900 GeV with ALICE at the LHC
Transverse momentum spectra of charged particles in proton–proton collisions at √ s = 900 GeV with ALICE at the LHC ✩,✩✩ ALICE Collaboration a r t i c l e i n f o a b s t r a c t Keywords: ALICE LHC pp 900 GeV Transverse momentum PYTHIA The inclusive charged particle transverse momentum distribution is measured in proton–proton collisions at √ s = 900 GeV at the LHC using the ALICE detector. Th...
متن کاملHeavy Ion Physics with the Alice Experiment at Lhc
Besides its proton-proton (pp) physics program, the Large Hadron Collider at CERN, which is going to start operating in early 2008, will deliver lead-lead (PbPb) collisions at a centre-of-mass energy √ sNN = 5.5 TeV, opening the door to unexplored regimes in heavy-ion particle physics from several points of view, such as the centre-of-mass energy, the energy density reached, the lifetime and th...
متن کاملJet Physics with Identified Particles at RHIC and LHC
I will present the latest results on particle identified spectra and two particle correlations at high transverse momentum measured with the STAR detector at RHIC. I will compare those measurements with the projected capabilities for the LHC using the ALICE detector. The effects of string fragmentation and quark recombination in the intermediate momentum range will be discussed in the context o...
متن کاملStrange and Multi-Strange Particle Production in ALICE
The production of strange and multi-strange hadrons in proton-proton (pp) and lead-lead (Pb-Pb) collisions is studied with the ALICE experiment at the CERN LHC. These particles are reconstructed via their weak decay topologies, exploiting the tracking and particle identification capabilities of ALICE. Measurements of central rapidity yields of Λ, Ξ− and Ω− baryons, their antiparticles and KS me...
متن کاملPhysics with the ALICE Electromagnetic Calorimeter
I will present physics measurements which are achievable in the ALICE experiment at the LHC through the inclusion of a new electromagnetic calorimeter. I will focus on jet measurements in proton proton and heavy ion collisions. Detailed simulations have been performed on jet reconstruction, jet triggering, heavy flavor jet reconstruction through electron identification, gamma-jet reconstruction...
متن کامل