“…We assume production via triangle diagrams which couple to the final state via non-perturbative interactions which are constrained by heavy-quark and <math altimg="si4.svg"><mi>S</mi><msub><mrow><mi>U</mi></mrow><mrow><mn>3</mn></mrow></msub></math>-flavor symmetry. …”
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“…The investigations presented in this work focused on the impact of the new CMS Phase-2 geometry on the Quark-Gluon Likelihood calculation and the consequent discrimination between forward jets originating by quark and gluons, useful to correctly identify the signature of the VBS process with WZ final state.…”
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“…At the LHC the model predicts net top quark polarization of the order of a few per cent for $M_{Z'} \simeq 1200 $ GeV, being as high as $10 %$ for a smaller mass of the $Z'$ of $700$ GeV and for the largest allowed coupling in the model, the values being higher for the $7$ TeV option. …”
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“…This thesis presents a Monte Carlo study of the search for charged Higgs bosons heavier than the mass of the top quark within the Minimal Supersymmetric Standard Model (MSSM) at the ATLAS experiment at the CERN Large Hadron Collider. …”
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“…The ratio $\overline{\Lambda}/K^{0}_{S}$, measuring the baryon-to-meson suppression in strange quark hadronisation, is significantly larger than expected. …”
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“…In this chapter I also propose the measurement of the polarization of the top quark from the excited gluon decay to discriminate between different models with similar final signatures. …”
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“…ALICE is one of the seven experiments at the Large Hadron Collider (LHC) at CERN, dedicated to the physics of heavy-ion collisions and, in particular, the properties of the Quark Gluon Plasma (QGP). In addition to studying Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}=2.76$\ TeV, ALICE has an extensive proton-proton (p-p) programme ($\sqrt{s}= 0.9$,\ 2.76,\ 7\ and 8\ TeV) aimed to provide a base for comparison with the Pb-Pb data as well as to complement the research in areas where ALICE is competitive with the other LHC experiments.\\* Of particular interest for the ALICE collaboration are the high-multiplicity p-p events. …”
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“…Fortunately, a new experiment a few years later unambiguously confirmed that the Quark Gluon Plasma had indeed been formed already at SPS energies. …”
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“….} + \nu}$ using single lepton and two lepton channels in ${t}$ quark pair (${t\bar{t}}$) events with a leptonically decaying ${\tau}$ in the final state based on ${1.03\textrm{ fb}^{-1}}$ of proton-proton collision data at centre of mass energy ${\sqrt{s}=7\textrm{ TeV}}$ from ATLAS, an experiment of the LHC, with special attention given to the statistical analysis and calculation involved in the limit setting process. …”
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“…The goal of the pp program is to investigate physics of and beyond the standard model, while the heavy-ion program attempts to characterize the properties of a new state of matter, called the Quark Gluon Plasma. The main aim of this dissertation is to identify particle production mechanisms in pp collisions, also as a reference for possible modifications due to the plasma formation in heavy-ion collisions. …”
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“…An energy scan around the 350 GeV $\mathrm{t\bar{t}}$ threshold allows a 10 MeV measurement of the top-quark mass.…”
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“…A suppression of the $J/\psi$ production was found in Pb-Pb collisions at $\sqrt{s_{_{\mathrm{NN}}}} =$ 2.76 TeV, providing further evidence of the formation of a deconfined medium in ultra-relativistic heavy-ion collisions, the so-called Quark-Gluon Plasma. In addition, p-Pb collisions at $\sqrt{s_{_{\mathrm{NN}}}} =$ 5.02 TeV have been studied at the LHC to measure cold nuclear matter effects (e.g. gluon shadowing, energy loss, nuclear absorption). …”
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“…Complex states of flowing matter are equally present in fundamental physical processes, far remote from our direct senses, such as quantum-relativistic matter under ultra-high temperature conditions (quark-gluon plasmas). Capturing the complexities of such states of matter stands as one of the most prominent challenges of modern science, with multiple ramifications to physics, biology, mathematics, and computer science. …”
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“…In order to improve the sensitivity especially for the high $\tilde{\chi}^{0}_{1}$ mass around 1 TeV, new techniques of quark/gluon separation and multivariate analysis are introduced. …”
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“…These models can be fully parametrized in terms of the top-quark mass, the ratio $\tan\beta=v_2/v_1$, and three supersymmetry breaking parameters ($m_{1/2},m_0,A$). …”
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“…In the second model, pair production of third-generation scalar leptoquarks that decay into $\tau\tau\textrm{b}\textrm{b}$ is considered, resulting in an observed (expected) exclusion region with leptoquark masses below 1.02 $(1.0)~\mathrm{TeV}$, assuming a $100\%$ branching fraction for the leptoquark decay to a $\tau$ lepton and a bottom quark. These results represent the most stringent limits to date.…”
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“…The construction of the first CLIC energy stage could start as early as 2026 and first beams would be available by 2035, marking the beginning of a physics programme spanning 25-30 years and providing excellent sensitivity to Beyond Standard Model physics, through direct searches and via a broad set of precision measurements of Standard Model processes, particularly in the Higgs and top-quark sectors.…”
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“…The ratios of the Higgs boson self-coupling and of the top-quark Yukawa coupling to their SM expectations ($k_{\lambda}=\lambda_{HHH}/\lambda_{HHH}^{SM}$ and $k_t=y_t/y_t^{SM}$) are constrained at 95\% confidence level respectively to $-9<k_\lambda<17$ and $-1.7<k_t<2$. …”
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“…The nuclear modification observed in pPb collisions is less pronounced than the strong modification observed in lead-lead collisions, suggesting presence of additional quark gluon plasma effects in the latter. Forward-backward production ratios $R_\mathrm{FB}$ of $\Upsilon$ states are reported as functions of event activity variables, obtained from midrapidity as well as forward and backward rapidity regions. …”
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