Browsing by Subject "Quarks"
Now showing items 1-20 of 50
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Amplitudes de espalhamento na cromodinâmica quântica em altas energias no formalismo de dipolos
(2008) [Thesis]Numa colisão hadrônica em altas energias, a densidade de quarks e glúons dentro do hádron cresce rapidamente, o que leva também ao crescimento das seções de choque. Esse comportamento, previsto pela Cromodinâmica Quântica ... -
Azimuthal correlations of heavy-flavor hadron decay electrons with charged particles in pp and p–Pb collisions at √sNN = 5.02 TeV
(2023) [Journal article]The azimuthal (ϕ) correlation distributions between heavy-flavor decay electrons and associated charged particles are measured in pp and p–Pb collisions at √sNN = 5.02 TeV. Results are reported for electrons with transverse ... -
A chiral bag model with a soft surface : structure and solutions of the fuzzy and the modified fuzzy bag model
(1998) [Journal article]In the present work we propose a new bag model for hadrons, called the modi ed fuzzy bag model (MFBM). The distinguishing feature of this model is the suppression of the pion eld, as it enters the bag, by means of a scalar ... -
Combination of inclusive and differential tt¯ charge asymmetry measurements using ATLAS and CMS data at √s = 7 and 8TeV
(2018) [Journal article]Abstract: This paper presents combinations of inclusive and di erential measurements of the charge asymmetry (AC) in top quark pair (t t) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data ... -
Combinations of single-top-quark production cross-section measurements and |fLV Vtb| determinations at √s= 7 and 8 TeV with the ATLAS and CMS experiments
(2019) [Journal article]This paper presents the combinations of single-top-quark production cross-section measurements by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at √s = 7 and 8 TeV corresponding to integrated ... -
Constraints on models of scalar and vector leptoquarks decaying to a quark and a neutrino at √s = 13 TeV
(2018) [Journal article]The results of a previous search by the CMS Collaboration for squarks and gluinos are reinterpreted to constrain models of leptoquark (LQ) production. The search considers jets in association with a transverse momentum ... -
Efeitos de alta densidade em processos Drell-Yan de altas energias
(2002) [Dissertation]Um dos problemas teóricos mais importantes da Física de Partículas de Altas Energias é a investigação de efeitos de alta densidade na Cromodinâmica Quântica (QCD), que é a teoria que descreve as interações fortes. Tais ... -
Estrutura nuclear de estrelas compactas
(2000) [Dissertation]Este trabalho tem como objetivo o estudo da matéria nuclear a altas densidades considerando-se as fases hadrônica e de quarks à temperatura nula e finita, com vistas a aplicações no estudo de propriedades estáticas globais ... -
Evidence for the associated production of a single top quark and a photon in proton-proton collisions at √s=13 TeV
(2018) [Journal article]The first evidence of events consistent with the production of a single top quark in association with a photon is reported. The analysis is based on proton-proton collisions at ffisffiffi p ¼ 13 TeV and recorded by the CMS ... -
A física dos quarks e a epistemologia
(2007) [Journal article]O objetivo deste trabalho é o de apresentar, conceitualmente, a física dos quarks como um assunto acessível e motivador que ilustra, de maneira inequívoca, a relação teoria e experimentação em física. Conta-se a história ... -
Investigando a dinâmica perturbativa da cromodinâmica quântica na produção de quarkonium nas colisões próton-núcleo no Large Hadron Collider
(2016) [Work completion of graduation]O presente trabalho tem como objetivo estudar a dinâmica perturbativa da Cromodinâmica Quântica em colisões próton-núcleo no LHC (Large Hadron Collider) com foco nos processos de produção de quarkonium (mésons vetoriais ... -
Investigating photoproduction of scalar mesons at medium energies
(2012) [Journal article]In this paper we study the photoproduction of scalar mesons in the intermediate energies, considering distinct mixing scenarios in the description of meson physical states. The differential and integrated total cross ... -
Measurement of inclusive and differential cross sections for single top quark production in association with a W boson in proton-proton collisions at √s = 13 TeV
(2023) [Journal article]Measurements of the inclusive and normalised differential cross sections are presented for the production of single top quarks in association with a W boson in proton-proton collisions at a centre-of-mass energy of 13 TeV. ... -
Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at √s = 13 TeV
(2023) [Journal article]The production of a top quark-antiquark pair in association with a W boson (t¯tW) is measured in proton-proton collisions at a center-of-mass energy of 13 TeV. The analyzed data was recorded by the CMS experiment at the ... -
Measurement of the top quark mass in the all-jets final state at √s = 13 TeV and combination with the lepton+jets channel
(2019) [Journal article]A top quark mass measurement is performed using 35.9 fb−1 of LHC proton–proton collision data collected with the CMS detector at √ s = 13 TeV. The measurement uses the tt all-jets final state. A kinematic fit is performed ... -
Measurement of the top quark mass with lepton+jets final states using pp collisions at √s = 13TeV
(2018) [Journal article]The mass of the top quark is measured using a sample of tt events collected by the CMS detector using proton-proton collisions at √ s = 13 TeV at the CERN LHC. Events are selected with one isolated muon or electron and at ... -
Measurement of the top quark polarization andt tt spin correlations using dilepton final states in proton-proton collisions at√s = 13 TeV
(2019) [Journal article]Measurements of the top quark polarization and top quark pair (t ̄t) spin correlations are presented usingevents containing two oppositely charged leptons (e+e−, e+- μ∓, or μ+μ−) produced in proton-protoncollisions at a ... -
Measurement of the top quark Yukawa coupling from t¯t kinematic distributions in the lepton+jets final state in proton-proton collisions at √s=13 TeV
(2019) [Journal article]Results are presented for an extraction of the top quark Yukawa coupling from top quark-antiquark (t¯t) kinematic distributions in the lepton plus jets final state in proton-proton collisions, based on data collected by ... -
Measurements of tt¯ differential cross sections in proton-proton collisions at √s = 13 TeV using events containing two leptons
(2019) [Journal article]Measurements of di erential top quark pair tt cross sections using events produced in proton-proton collisions at a centre-of-mass energy of 13TeV containing two oppositely charged leptons are presented. The data were ... -
Modelo de três quarks confinados em um potencial do tipo oscilador harmônico
(1998) [Abstract published in event]
