“…ALICE (A Large Ion Collider Experiment) is a general purpose heavy-ion detector at the CERN LHC addressing the physics of strongly interacting matter and the quark-gluon plasma in nucleus-nucleus collisions. …”
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“…This paper describes the first measurement of the cross section of single top quark production in the $t$ channel in pp collision data at $\sqrt{s}=7$ TeV, recorded at LHC with the CMS detector with an integrated luminosity of 35.9 pb$^{-1}$. …”
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“…Lastly we present the first observation of top quark pairs produced at the LHC and identified both in single-lepton and di-lepton decay channels.…”
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“…A search for top quark pair ($t\bar{t}$) resonances in the lepton plus jets final states has been performed with the ATLAS experiment at the LHC. …”
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“…We search for such a resonance using the final state where both $W$ bosons from the top quark decay into either an electron and electron-neutrino or a muon and muon-neutrino (dilepton final state). …”
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“…%and which may mimic true top quark decays. A measurement of the ratio of branching fractions $R=B(t\rightarrow Wb)/B(t\rightarrow Wq)$ is performed by counting the jets identified as $b$-jets.%, using a dedicated tagging algorithm. …”
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“…Significant results have already been obtained in the search for the Higgs boson, which would establish the postulated electro-weak symmetry breaking mechanism in the SM, as well as for BSM physics such as Supersymmetry (SUSY), heavy new particles, quark compositeness and others. The important, and successful, SM physics measurements are giving confidence that the experiments are in good shape for their journey into the uncharted territory of new physics anticipated at the LHC.…”
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“…In order to test the CPT invariance, we performed a measurement of the mass difference between the top and the antitop quark ($\Delta m_{\text{t}} = m_{\mathrm{t}} - m_{\overline{\mathrm{t}}}$) using events with a muon or an electron and at least four jets in the final state. …”
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“…The distribution of pseudorapidity of the recoil quark is exploited to extract the signal simultaneously in the events with positively and negatively charged leptons. …”
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“…Events with muons in the final state are an important signature for many physics topics at the Large Hadron Collider (LHC), for instance searches for muonic Higgs boson decays or new phenomena, or measurements of the standard model (SM) processes like top-quark, W-boson, and Z-boson production. The use of efficient trigger muon selections during data taking and a good understanding of their performance is crucial for these physics studies. …”
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“…The associated production of a Standard Model Higgs boson with a top quark pair is a key process to isolate in order to get direct access to top-Higgs Yukawa coupling $y_t$. …”
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“…Events with muons in the final state served an important signature for many physics topics at Large Hadron Collider (LHC), for instance, discovery of Higgs boson production, searches for new phenomena, and measurements on the standard model processes like top-quark, W, Z production. Thus, efficient trigger on muons in data taking and understanding its performance were crucial to perform these physics studies. …”
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“…This poster presents a specific search of the $W′$ boson, decaying to a top and a b quark in an effective coupling approach, by using a multivariate method based on boosted decision trees. …”
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“…In the framework of post-LHC accelerator studies, TLEP is a proposed high-luminosity circular e+e- collider, aimed at measuring the properties of the Higgs boson H(126) with unprecedented accuracy, as well as those of the W boson, the Z boson and the top quark. In order to calculate the impact of synchrotron radiation, the latter has been implemented in the FLUKA code as new source term. …”
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“…Generalisations to less symmetric cases of gauge/gravity duality and their applications are then presented, in particular to finite temperature and density, hydrodynamics, QCD-like theories, the quark-gluon plasma and condensed matter systems. …”
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“…In addition, the production of heavy flavour in association with a W or Z boson represents is sensitive to the parton density functions and to the modeling heavy≠quark flavour production mechanisms. Measurement of the transverse momentum of the Z boson is sensitive to soft resummation effects for small momentumtransfers and to multiple hard jet emissions for large momentum transfers, probing QCD in a unique way. …”
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“…Measurements of vector boson production in lead-lead collisions provide essential control data for studies of jets and jet quenching in the quark gluon plasma. Because the electroweak bosons do not interact strongly in the plasma, measurements of their production rates can be predicted using standard high-energy event generators. …”
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“…Seesaw heavy fermions can be produced in LHC proton-proton collisions through quark-annihilation via a virtual boson followed by decays into standard model bosons and leptons. …”
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“…The production cross sections of top-quark pairs in association with massive vector bosons have been measured using $pp$ collision data corresponding to an integrated luminosity of 20.3/fb, collected by the ATLAS detector in 2012 at the LHC. …”
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“…An example of a FCNC is the $b \to s$ quark transition described by the electroweak penguin Feynman diagram shown in Figure 1. …”
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