“…Analyses of these collisions provide unique insights into the physics governing the creation of matter and the Quark Gluon Plasma (QGP), an exotic state of matter expected to have been prevalent in the Universe at $\sim 10^{-6}$ seconds after the Big Bang. …”
Enlace del recurso

“…ALICE focuses on the physics of the strong interaction and in particular on the Quark-Gluon Plasma. This is a state of matter in which quarks are de-confined. …”
Enlace del recurso

“…The background is dominated by a $t\bar{t}$ process with an additional gluon in the final state which further splits into a pair of $b$-quarks ($t\bar{t}+b\bar{b}$). …”
Enlace del recurso

“…ALICE is dedicated to the exploration of the Quark-Gluon Plasma (QGP), a state of matter in which quarks can be seen as quasi-free particles. …”
Enlace del recurso

“…Heavy-ion collisions at ultra-relativistic energies give a unique possibility to create and to analyse the Quark-Gluon Plasma predicted by the theory of Quantum Chromodynamics. …”
Enlace del recurso

“…This method was first developed to reduce the jet energy response dependence on the jet flavour, for gluon and light quark jets. My contribution was the validation and detailed performance studies for b-jets in general, and in particular for b-jets coming from the Higgs boson decay. …”
Enlace del recurso

“…The theory of strong interactions, Quantum Chromodynamics (QCD), predicts that at sufficiently high energy densities nuclear matter transforms into a deconfined state of quarks and gluons. One of the possible signatures of a transition between hadronic and partonic phases is the enhancement of fluctuations of the number of particles in the hadronic final state of relativistic heavy-ion collisions. \\ \\ The observable $\nu_{\rm{dyn}}$, which is defined in terms of the moments of particle multiplicity distributions, is used to quantify the magnitude of the dynamical fluctuations in event-by-event measurements of particle ratios: $K/\pi$, $p/\pi$ and $K/p$. …”
Enlace del recurso

“…At relativistic energies, the heavy-ion collisions provide a unique environment to study the properties of strongly interacting matter known as Quark Gluon Plasma (QGP) created just after the ``Big-Bang''. …”
Enlace del recurso

“…The finding that the medium produced in relativistic heavy-ion collisions, denominated as quark gluon plasma (QGP), behaves almost like an ideal fluid caused a flood of initiatives to try to determine their characteristics. …”
Enlace del recurso

“…Since there is no 4-prong object with large statistics in the SM, fully merged top together with an extra quark or gluon forms the proxy as a mimic. A novel method, which is refered as "Matix Method", is developed to calibrate the discriminator. …”
Enlace del recurso

“…The main focus of research in the field of high-energy heavy-ion physics is the study of the quark-gluon plasma (QGP). Topic of the present work is the measurement of electron-positron pairs (dielectrons), which grant direct access to some of the key properties of this state of matter, since after their formation they leave the hot and dense medium without significant interaction. …”
Enlace del recurso

“…It is devoted to collecting the data from high-energy heavy ion collisions, where a new state of nuclear matter that is thought to exist in the early universe can be created in QGP (quark-gluon plasma). From the analysis of data we can investigate its formation and properties. …”
Enlace del recurso

“…The study of the quark-gluon plasma (QGP), a state of matter which is supposed to have existed after big-bang, is the objective of ultra-relativistic nuclear collisions. …”
Enlace del recurso

“…In central heavy-ion collisions, a deconfined state of matter, known as Quark-Gluon Plasma (QGP), is formed. In the forward rapidity region, ALICE is equipped with a muon spectrometer, detecting quarkonia (e.g. …”
Enlace del recurso

Enlace del recurso

“…This final state is part of awider H → τ τ search program performed by CMS which is briefly outlined in the firstchapter of this work.The main source of background in this final state comes from a wide range of processes (mainly top quark production and W boson production in association with jets)in which at least one of the leptons in the final state comes from a misidentified quarkor gluon jet. To model this source of backgrounds a fully data-driven method is developed.The search observes a combined signal strength of µ = −2.6 ± 1.7, below the SM expectations but still compatible with it at 2.1 σ level. …”
Enlace del recurso

“…One of the most powerful methods developed to probe the properties of the Quark-Gluon Plasma (QGP) is the technique of two-particle correlations in momentum space, called \emph{femtoscopy}. …”
Enlace del recurso

“…Quark-Gluon Plasma (QGP) is the deconfined state of strongly interacting mater, predicted by Quantum Cromodynamics (QCD), which is expected to exist in the early stages of evolution of the Universe, just after the Big-Bang. …”
Enlace del recurso

“…The primary goal of A Large Ion Collider Experiment (ALICE) at the Large Hadron Collider (LHC) is to study the nuclear matter under extreme condition of temperature and energy density, where a transient state of matter known as Quark-Gluon Plasma (QGP) is believed to be created. Indications of its existence have already been provided by previous studies at the Super Proton Synchrotron (SPS) at CERN and the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory. …”
Enlace del recurso

“…Ultra-relativistic Heavy Ion Collisions (HICs) allow to reproduce the extreme conditions of temperature and energy density where the Quark-Gluon Plasma (QGP) is formed. Based on the current cosmological picture, QGP was the state of our universe few $\mu$s after the Big Bang. …”
Enlace del recurso