“…--HTML-->We describe a novel application of the end-to-end deep learning technique to the task of discriminating top quark-initiated jets from those originating from the hadronization of a light quark or a gluon. The end-to-end deep learning technique combines deep learning algorithms and low-level detector representation of the high-energy collision event. …”
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“…The results obtained by TOTEMare indeed compatible with predictions of a colourless 3-gluon boundstate exchange in the t-channel of proton-proton elastic scattering,as postulated by alternative theoretical models both in the Regge-likeframework and in the modern QCD framework.In this contribution the TOTEM experiment detectors and results willbe described, along with the actual experiment status, the futurephysics program for the LHC Run~3.…”
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“…The relativistic collisions of heavy ions revealed the existence of a new, dense and hot state of matter, the quark-gluon plasma (QGP). Models assuming that after the collision, the QGP stage occurs and the QGP behaves like nearly perfect liquid are sucessful in describing collective behaviours observed experimentally. …”
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“…The correlation between the event-wise average transverse momentum ($[\pT]$) and the harmonic flow ($v_{n}$) carries important information about the initial-state geometry of the Quark-Gluon Plasma. Additionally, the potential quadrupole deformation in Xe+Xe is predicted to produce an initial state with enhanced shape and size fluctuations, and result in non-trivial change in the correlation. …”
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“…When considering heavy-ion collisions, particle polarization could also be used to investigate the characteristics of the hot and dense medium (quark-gluon plasma, QGP) created at LHC energies. In ALICE, this observable is extracted by measuring the anisotropies in the angular distribution of the muons coming from the quarkonium state decay. …”
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“…This dissertation presents a search for non-resonant Higgs boson pair production, focusing on the four bottom quark decay channel. It explores the gluon fusion and vector boson fusion production mechanisms. …”
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“…Here we thus demonstrate, for the first time, that top quark decay products (leptonically decaying W bosons and bottom quarks) are identified, irrespective of any possible final-state interactions with the quark-gluon plasma.…”
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“…Bottomonia are produced by hard scattering in the early times of a relativistic heavy-ion collision, so they serve as excellent probes of the quark-gluon plasma (QGP). Early CMS data showed that the yields of the $\Upsilon(1S)$, $\Upsilon(2S)$, and $\Upsilon(3S)$ mesons are suppressed in PbPb relative to those in pp. …”
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“…The flow results allow to improve the understanding of initial conditions of nuclear collisions, hydrodynamical behaviour of Quark–Gluon Plasma and parton energy loss.…”
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“…High-multiplicity events in small collision systems (pp, p-Pb) at LHC energies exhibit soft-physics phenomena that are associated with collective dynamics of the quark-gluon plasma (QGP) in large collision systems, e.g. azimuthal correlation between soft particles having large pseudorapidity separation. …”
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“…A search for nonresonant Higgs boson (H) pair production via gluon and vector boson (V) fusion is performed in the final state where each H decays to a bottom quark-antiquark pair, using $138\,\text{fb}^{-1}$ of proton-proton collision data collected by the CMS experiment at $\sqrt{s}=13\,\text{TeV}$. …”
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“…The polarization could be connected with the existence of a strong magnetic field in the early stage of quark--gluon plasma formation in Pb--Pb collisions, as well as with its behaviour as a rotating fluid with large vorticity.…”
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“…Investigations of anisotropic flow can provide us with necessary information about the initial state and the evolution of the deconfined strongly interacting matter called quark-gluon plasma (QGP). CMS measurements of flow harmonics and their fluctuations and (de)correlations cover a wide range of transverse momenta, pseudorapidity and centrality or event activity in different collision systems. …”
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“…Exclusion limits are also set on two HEFT coupling parameters associated with the couplings of a Higgs boson pair with two gluons, $c_{gghh}$, and with a top-quark pair, $c_{tthh}$. …”
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“…In larger systems, the long-range correlations are known to arise from the collective dynamics of the produced quark-gluon plasma (QGP). The similarity between the $pp$ and heavy-ion measurements raises the possibility that a tiny droplet of the QGP is produced even in $pp$. …”
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“…The result is in agreement with theoretical quantum chromodynamic calculations at next-to-next-to-leading order in the strong coupling constant, including the resummation of next-to-next-to-leading logarithmic soft-gluon terms, and constrains the parton distribution functions of the proton at large Bjorken-$x$.…”
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“…We have performed general searches for new resonances for a specific benchmark models: $Z^{'}_{TC2}$ boson, Kaluza-Klein gluon and Kaluza-Klein graviton that decay into top-quark pairs. …”
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“…Furthermore, charmonia in small systems are fundamental to understand the properties of the quark-gluon plasma (QGP) created in heavy-ion collisions. …”
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“…A Large Ion Collider Experiment (ALICE) is an experiment station at CERN that detects quark-gluon plasma, a state of matter thought to have formed immediately after the big bang. …”
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“…In contrast to light-flavour jets, heavy-flavour jet substructure should be affected by the dead cone effect which suppresses collinear gluon emission off a heavy-flavour quark radiator. …”
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