“…In accelerators as the one of LHC, collisions will help to reproduce the Quark Gluon Plasma. With such a purpose, the ALICE detector is optimized to study the transition toward this hypothetic state of matter. …”
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“…Naturalness, in particular in demanding that rare B decays remain consistent with experiment without fine-tuned cancellations, provides a lower (upper) bound to the stop contribution to the Higgs-gluon coupling (Higgs mass). Two parameters suffice to describe Higgs mixing, even in the presence of loop induced non-holomorphic Yukawa couplings. …”
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“…ALICE experiment is a general-purpose detector designed to study the Quark-Gluon Plasma in heavy-ion collisions at CERN LHC. …”
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“…Its coupling to pairs of standard-model gauge bosons are dimension-five operators whose strengths are determined within the model. It is easy for the gluon fusion rate $\sigma B(gg \to \eta_T \to \gamma\gamma)$ to agree with the measured one, but $\eta_T \to ZZ^*,\,WW^*$ are greatly suppressed relative to the standard-model Higgs rates. …”
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“…Prompt photons are produced primarily by quark-gluon compton scattering and quark-anti-quark annihilation mechanisms that their measurements are driven by several motivations at hadron colliders. …”
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“…In particular, in-medium energy loss is predicted to be different for massless partons (light quarks and gluons) and heavy quarks at moderate momentum. The ALICE apparatus allows us to measure open heavy-flavour particles in several decay channels and with a wide phase-space coverage. …”
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“…Background from $c$-jets and light quarks and gluons have been studied using LHCb Monte Carlo simulations. …”
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“…Quarkonia are especially relevant for studying the quark-gluon plasma since they are produced at early times and propagate through the medium, mapping its evolution. …”
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“…--HTML-->The characterization of the Quark-Gluon Plasma (QGP), the deconfined state of strongly-interacting matter produced in high-energy collisions of heavy ions, is the main purpose of ALICE. …”
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“…A spin-2 graviton, produced entirely by gluon fusion, is excluded at 94%$~$C.L.$~$(92$\%$ expected) and a spin-2 graviton, produced entirely by quark-antiquark annihilation, is excluded at 85$\%~$C.L.$~$(83$\%$ expected).…”
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“…The quantum chromodynamics theory predicts the existence of a deconfined state of matter called Quark Gluon Plasma (QGP). Experimentally, the formation of a QGP is expected under the extreme conditions of temperature and density reached in ultra-relativistic heavy-ion collisions. …”
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“…This process is sensitive to the top-quark mass since gluon radiation depends on the mass of the quarks. …”
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“…Similarly , the energy loss via gluon radiation for these massive quarks should be suppressed, th e so-called dead cone ef- fect. …”
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“…A search for single top-quark production via flavour changing neutral current processes from gluon plus up or charm quark initial states in proton--proton collisions at the LHC is presented. …”
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“…In two Higgs doublet models, including the next-to-minimal supersymmetric standard model, the Higgs can decay into a pair of light scalars h or pseudoscalars a. In this search, the gluon fusion, W and Z associated Higgs, and vector boson fusion production channels for the Higgs are all considered, and the decay $\mathrm{H}\rightarrow\mathrm{a}\mathrm{a}(\mathrm{h}\mathrm{h})$ with $\mathrm{a}(\mathrm{h})\rightarrow\tau\tau$ is reconstructed from the tau decay products. …”
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“…A search for single top-quark production via flavour changing neutral current processes from gluon plus up or charm quark initial states in proton--proton collisions at the LHC is presented. …”
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“…A search for single top-quark production via flavour changing neutral current processes from gluon plus up- or charm--quark initial states in proton--proton collisions at the LHC is presented. …”
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“…Bottomonia are important probes of the quark-gluon plasma since they are produced at early times and propagate through the medium, mapping its evolution. …”
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“…In this dissertation, I present a search for non-standard decays of a Standard Model-likeHiggs boson to pairs of light bosons, as predicted in models with extended Higgs sectors.In two Higgs doublet models, including the next-to-minimal supersymmetric standardmodel, the Higgs boson can decay into a pair of light pseudoscalars a.In this search, the gluon fusion, W and Z associated Higgs, and vector boson fusionproduction channels for the Higgs are all considered, and the decay H →aa with a → τ τis reconstructed from the tau decay products. …”
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“…Assuming the Standard Model gluon-fusion production cross section for a 125$~$GeV Higgs boson, its branching ratio to dark photons is found to be below 10$\%$, at 95$\%$ CL, for dark-photon lifetimes in the range 2.2$~\leq~c\tau~\leq~$111.3$~$mm in a Higgs$~\rightarrow~2\gamma_{\mathrm{d}}+X$ benchmark model and in the range 3.8$~\leq~c\tau~\leq~$163$~$mm in a Higgs$~\rightarrow~4\gamma_{\mathrm{d}}+X$ model. …”
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