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Studium produkce jetů v experimentu ALICE na urychlovači LHC
Kučera, Vít ; Bielčíková, Jana (advisor) ; Dolejší, Jiří (referee)
Title: Study of jet production with the ALICE experiment at the LHC Author: Vít Kučera Department: Institute of Particle and Nuclear Physics Supervisor: RNDr. Jana Bielčíková, Ph.D., Nuclear Physics Institute of the ASCR, v.v.i. Abstract: The theory of strong interaction, quantum chromodynamics, predicts a phase transition between hadronic matter and the quark-gluon plasma where quarks and gluons are deconfined. This state of matter is expected to be created in ultra-relativistic collisions of heavy ions. Jets from partons which interact with the strongly interacting matter created in heavy-ion collisions can be used as probes to study this medium. The ALICE experiment installed at the Large Hadron Collider at CERN enables using jets to study medium in heavy-ion collisions. An analysis of data measured with the ALICE experiment in 2010 in the lead nuclei collisions at energy √ sNN = 2.76 TeV is presented in the thesis. The results of this analysis are presented in a study of jets reconstructed with the kt and anti-kt algorithms. The study includes an analysis of tracks, an analysis of background and focuses on an analysis of inclusive jet spectra. Various aspects of jet spectra are studied including modification of jets in the central collisions expressed by the ratio RCP. Also a summary of author's...
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Studium potlačení jetů ve srážkách těžkých iontů na LHC pomocí detektoru ATLAS
Štefko, Pavol ; Spousta, Martin (advisor) ; Pleskot, Vojtěch (referee)
Jet production in PbPb collisions at a per-nucleon center-of-mass energy of 2.76 TeV has been studied using the ATLAS detector at the LHC. Interactions between the high- pT partons and the hot, dense medium, produced in these ultrarelativistic collisions, are expected to cause the loss of the jet energy (jet quenching). This thesis presents results of the jet analysis done on the data taken during the 2011 heavy-ion run at the LHC. Jets are reconstructed using the anti-kt jet clustering algorithm and studied as a function of collision centrality and dijet energy imbalance. With increasing centrality, dijets are observed to be increasingly asymmetric, consistent with the theory of jet quenching. The study of charged particle tracks indicates the increase of the low-pT tracks in the strongly quenched jets. 1
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Studium potlačení jetů ve srážkách těžkých iontů na LHC pomocí detektoru ATLAS
Štefko, Pavol ; Spousta, Martin (advisor) ; Pleskot, Vojtěch (referee)
Jet production in PbPb collisions at a per-nucleon center-of-mass energy of 2.76 TeV has been studied using the ATLAS detector at the LHC. Interactions between the high- pT partons and the hot, dense medium, produced in these ultrarelativistic collisions, are expected to cause the loss of the jet energy (jet quenching). This thesis presents results of the jet analysis done on the data taken during the 2011 heavy-ion run at the LHC. Jets are reconstructed using the anti-kt jet clustering algorithm and studied as a function of collision centrality and dijet energy imbalance. With increasing centrality, dijets are observed to be increasingly asymmetric, consistent with the theory of jet quenching. The study of charged particle tracks indicates the increase of the low-pT tracks in the strongly quenched jets. 1
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Studium produkce jetů v experimentu ALICE na urychlovači LHC
Kučera, Vít ; Bielčíková, Jana (advisor) ; Dolejší, Jiří (referee)
Title: Study of jet production with the ALICE experiment at the LHC Author: Vít Kučera Department: Institute of Particle and Nuclear Physics Supervisor: RNDr. Jana Bielčíková, Ph.D., Nuclear Physics Institute of the ASCR, v.v.i. Abstract: The theory of strong interaction, quantum chromodynamics, predicts a phase transition between hadronic matter and the quark-gluon plasma where quarks and gluons are deconfined. This state of matter is expected to be created in ultra-relativistic collisions of heavy ions. Jets from partons which interact with the strongly interacting matter created in heavy-ion collisions can be used as probes to study this medium. The ALICE experiment installed at the Large Hadron Collider at CERN enables using jets to study medium in heavy-ion collisions. An analysis of data measured with the ALICE experiment in 2010 in the lead nuclei collisions at energy √ sNN = 2.76 TeV is presented in the thesis. The results of this analysis are presented in a study of jets reconstructed with the kt and anti-kt algorithms. The study includes an analysis of tracks, an analysis of background and focuses on an analysis of inclusive jet spectra. Various aspects of jet spectra are studied including modification of jets in the central collisions expressed by the ratio RCP. Also a summary of author's...
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