“…This thesis presents the measurement of observables sensitive to the effects of colour reconnection in top-quark pair-production events. The measurement is performed using 139 $\mbox{fb\(^{-1}\)}$ of 13 TeV proton--proton collision data collected by the ATLAS detector at the Large Hadron Collider. …”
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“…Measurement of various resonances has different lifetimes, masses, quantum numbers and quark content, which can provide a wealth of information to understand the particle production mechanism, strangeness enhancement, parton energy loss, and the possible onset of collective effects in small systems. …”
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“…These include measurement of vn-[pT] correlations in Xe+Xe and Pb+Pb, which carry important information about the initial-state geometry of the Quark-Gluon Plasma and can potentially shed light on any quadrupole deformation in the Xe nucleus. …”
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“…The inclusive top-quark pair (tt ̅) production cross-section was measured in proton-proton collisions at a center of mass energy of 5 TeV with 257 pb^(-1) of data collected by the ATLAS detector. …”
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“…For spin-0 resonances produced via gluon-gluon fusion, the observed limits at 95\% confidence level vary between 65.5 fb and 0.6 fb, while for spin-2 resonances via gluon-gluon fusion (quark-antiquark initial states) limits vary between 77.4 (76.1) fb and 0.6 (0.5) fb for the mass range from 220 GeV to 3400 GeV.…”
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“…The main goal of the strong interactions program of NA61/SHINE is to study the properties of the phase transition between confined matter and quark-gluon plasma by performing a two-dimensional scan in beam momentum and size of collided nuclei. …”
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“…This thesis focuses on an interaction of a Higgs boson with a single top quark, possibly the heaviest elementary particle of the Standard Model of particle physics. …”
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“…Presented measurements of muon pairs produced via two-photon scattering processes in hadronic Pb+Pb collisions provide a novel test of strong-field QED by exploiting correlations between the lepton pair and second-order event plane, which can potentially be a sensitive electromagnetic probe of the quark-gluon plasma. Results are compared with recent theory calculations.…”
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“…Measurements of dijets that traverse a quark-gluon plasma can provide insights into the jet energy loss in heavy ion collisions. …”
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“…Presented measurements of muon pairs produced via two-photon scattering processes in hadronic Pb+Pb collisions provide a novel test of strong-field QED by exploiting correlations between the lepton pair and second-order event plane, which can potentially be a sensitive electromagnetic probe of the quark-gluon plasma. Results are compared with recent theory calculations.…”
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“…Additionally, the results are important to test whether such photo-nuclear collisions may produce small droplets of quark-gluon plasma that flow hydrodynamically.…”
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“…Jet substructure observables provide unique probes of the properties of the Quark-Gluon Plasma (QGP). In these proceedings we report new measurements of groomed jet substructure in central Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV. …”
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“…Jackson, has compiled a useful summary and bibliography of more than 500 key papers marking the development of particle physics from 1895 to the discovery of the top quark in 1995. Some 70 percent of the listed papers are post World War 2. …”
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“…Some Standard Model processes, otherwise strongly suppressed, can also be studied inside the soliton, where the SU(2) symmetry can be restored, and the quark confinement may be absent. Baryon number violating processes catalyzed by the large VEV inside the Q-ball can provide an inexhaustible energy resource.…”
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“…Results of the recent comprehensive ALEPH measurement of tau decays involving kaons, yielding the total strange width R/sub tau , s/ and the strange spectral function, are used in a combination of strange and non-strange spectral moments to determine the strange quark mass and non-perturbative contributions to the strange hadronic width. …”
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“…The study of D/sub s//sup -//D/sub s//sup +/ production represents the first measurement of charm production with a leading strange quark. (5 refs).…”
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“…The leading term of a heavy top expansion of our result differs from the one obtained in the gaugeless approximation where only top quark Yukawa couplings are considered: we discuss the origin of the discrepancy and provide a criterion for the validity of the gaugeless approximation. …”
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“…The nu /sub mu / charged current interactions in the experiment target could also be used to study charm quark production. A search was made among nu /sub mu / charged current events to isolate the signal: D*/sup +/ to D/sup 0/+ pi /sup +/ to K/sup -/+ pi /sup +/. …”
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“…The aim of the experiment is to survey the reaction mechanisms involved in the collision of 60~GeV/nucleon and 200~GeV/nucleon light ions ($^{16}$0 and $^{32}$S provided by a new GSI-LBL injector) with different nuclei, to determine the stopping power of nuclear matter and to search for evidence of the formation of quark matter by comparison to hadron-nucleus reactions at the same incident energies. \\ The experimental set-up consists of a 2 m Streamer Chamber in the Vertex Magnet used to detect all the charged particles emerging from the interaction as well as the neutral strange particles that decay inside the chamber. …”
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“…The main goal of the experiment is to observe and study the phase transition from hadronic matter to deconfined partonic matter (Quark Gluon Plasma — QGP). ALICE is conceived as a general purpose detector and will address most of the phenomena related to the QGP formation at LHC energies: to this purpose, a large fraction of the hadrons, leptons and photons produced in each interaction will be measured and identified.…”
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