A5015348733- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Physics of Superconductivity and Magnetism
- Semantic Web and Ontologies
- Geographic Information Systems Studies
- Superconducting Materials and Applications
- Data Management and Algorithms
- Natural Language Processing Techniques
- Black Holes and Theoretical Physics
- Web Data Mining and Analysis
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Topic Modeling
- Context-Aware Activity Recognition Systems
- Medical Imaging Techniques and Applications
- Geography and Environmental Studies
- Software Testing and Debugging Techniques
- Software Engineering Research
- Seismic Imaging and Inversion Techniques
- Software Reliability and Analysis Research
- Software System Performance and Reliability
- Linguistic Studies and Language Acquisition
- Algorithms and Data Compression
- Information Retrieval and Search Behavior
University of Lisbon
2014-2024
Fraunhofer Portugal Research
2018-2023
Instituto Superior Técnico
2008-2022
Instituto Politécnico de Lisboa
2008-2022
Goethe University Frankfurt
2022
University of Bonn
2022
Université de Toulon
2020
Centre National de la Recherche Scientifique
2020
Universidade do Porto
2012-2019
Centro Hospitalar do Porto
2017-2018
We review the present status of Standard Model calculation anomalous magnetic moment muon. This is performed in a perturbative expansion fine-structure constant $\alpha$ and broken down into pure QED, electroweak, hadronic contributions. The QED contribution by far largest has been evaluated up to including $\mathcal{O}(\alpha^5)$ with negligible numerical uncertainty. electroweak suppressed $(m_\mu/M_W)^2$ only shows at level seventh significant digit. It two loops known better than one...
We study the SU(3) gluon propagator in renormalizable $R_\xi$ gauges implemented on a symmetric lattice with total volume of (3.25 fm)$^4$ for values guage fixing parameter up to $\xi=0.5$. As expected, longitudinal dressing function stays constant at its tree-level value $\xi$. Similar Landau gauge, transverse gauge saturates non-vanishing deep infrared all $\xi$ studied. compare very recent continuum studies and perform simple analysis found saturation dynamically generated effective mass.
In lattice QCD, colour confinement manifests in flux tubes. We compute detail the quark-antiquark tube for pure gauge SU(3) dimension $D=3+1$ distances R ranging from 0.4 fm to 1.4 fm. To increase signal over noise ratio, we apply improved multihit and extended smearing techniques. invariant squared components of electric magnetic fields both mediator plane between static quark antiquark planes sources. fit field densities with appropriate ansatze observe screening all studied together...
We address the interpretation of Landau gauge gluon propagator at finite temperature as a massive type bosonic propagator. Using pure SU(3) lattice simulations fixed volume $\sim(6.5fm)^3$, we compute electric and magnetic form factors, extract mass from Yukawa-like fits, study its dependence. This is relevant both for Debye screening high $T$ confinement low $T$.
We investigate the critical curve of string tension sigma(T) as a function temperature in quenched gauge invariant SU(3) lattice theory. extract from colour averaged free energy static quark-antiquark pair. To compute energy, we utilize pair Polyakov loop and antiloop correlations, apply multihit procedure to enhance signal noise ratio. find that departs zero sigma(0) at T close 0.5 Tc. cover relevant range Tc up confinement using 57 different sets pure configurations with four temporal...
We compute the composition of bottomonium $\mathrm{\ensuremath{\Upsilon}}(nS)$ states [including $\mathrm{\ensuremath{\Upsilon}}(10860)$] and new $\mathrm{\ensuremath{\Upsilon}}(10753)$ resonance reported by Belle in terms quarkonium meson-meson components. use a recently developed novel approach utilizing lattice QCD string breaking potentials for study resonances. This is based on diabatic extension Born-Oppenheimer approximation unitary emergent wave method allows us to poles $\mathrm{S}$...
We discuss how to study $I=0$ quarkonium resonances decaying into pairs of heavy-light mesons using static potentials from lattice QCD. These can be obtained a set correlation functions containing both and light quarks. As proof concept, we focus on bottomonium with relative orbital angular momentum ${L}_{\overline{Q}Q}=0$ the $\overline{b}b$ pair corresponding ${J}^{PC}={0}^{\ensuremath{-}+}$ ${J}^{PC}={1}^{\ensuremath{-}\ensuremath{-}}$. use an existing QCD string breaking compute phase...
We combine techniques previously utilized to study flux tube field density profiles and the excited spectrum of gluonic fields produced by a static quark-antiquark pair. Working with pure gauge SU(3) discretized in lattice, we utilize Wilson loops large basis spacelike lines include different excitations tube. To increase signal over noise ratio, use multihit technique temporal APE smearing spatial lines. The number operators combined space points where compute densities turns out be very...
In this paper we study $I=0$ bottomonium in $S$, $P$, $D$ and $F$ waves considering five coupled channels, one confined quarkonium four open ${B}^{(*)}{\overline{B}}^{(*)}$ ${B}_{s}^{(*)}{\overline{B}}_{s}^{(*)}$ meson-meson channels. To end use extend a recently developed novel approach utilizing lattice QCD string breaking potentials for the of bound states resonances. This is based on Born-Oppenheimer approximation unitary emergent wave method allows to compute poles $\mathrm{T}$ matrix....
The color fields created by the static tetraquark system are computed in quenched SU(3) lattice QCD, a ${24}^{3}\ifmmode\times\else\texttimes\fi{}48$ at $\ensuremath{\beta}=6.2$ corresponding to spacing $a=0.07261(85)\text{ }\text{ }\mathrm{fm}$. We find that well described double-Y, or butterfly, shaped flux tube. two flux-tube junction points compatible with Fermat minimizing total length. also compare diquark-diantiquark central profile quark-antiquark fundamental meson, and they match,...
This paper introduces a new approach for expansion of queries with geographical context. The proposed strategy is based on query parser that captures geonames and spatial relationships, maps features feature types into concepts ontology. Different strategies expansion, according to the restrictions given by user, are compared. method allows more versatile focused towards information need user.
Abstract Introduction Frailty increases the risk of poor health outcomes, disability, hospitalization, and death in older adults affects 7%–12% aging population. Secondary impacts frailty on psychological socialization are significant negative contributors to outcomes for frail adults. Method The My Active Healthy Aging (My‐AHA) consortium has developed an information communications technology–based platform support active healthy through early detection prefrailty provision individually...
We compute the color fields of SU(3) lattice QCD created by static pentaquark systems, in a ${24}^{3}\ifmmode\times\else\texttimes\fi{}48$ at $\ensuremath{\beta}=6.2$ corresponding to spacing $a=0.07261(85)\text{ }\text{ }\mathrm{fm}$. find that are well described multi-Y-type shaped flux tube. The tube junction points compatible with Fermat-Steiner minimizing total length. also compare profile diquark-diantiquark central tetraquark and quark-antiquark fundamental meson, they match, thus...
We present colour field density profiles for some of the first SU(3) gluonic excitations flux tube in presence a static quark-antiquark pair. The results are obtained from large set operators.
The population is getting old, and the use of technology has improved quality life senior population. This confirmed by increasing number solutions targeting healthy active ageing. Such keep track daily routine elderly combine it with other relevant information (e.g., biosignals, physical activity, social nutrition) to help identify early signs decline. Caregivers elders this improve their routine, focusing on improving current condition. With that in mind, we have developed a software...
In addition to contributing increased training motivation, exergames are a promising approach counteract age-related impairments. Mobility limitations, cognitive impairment, and urinary incontinence very common in older adults. To optimally address these conditions, should include interventions for strength, balance, cognition, pelvic floor muscle training. this study, we develop personalized multicomponent exergame solution the geriatric rehabilitation of The can provide one single session,...
We compute the spectra of flux tubes formed between a static quark-antiquark pair up to significant number excitations and for eight symmetries tubes, ${\mathrm{\ensuremath{\Delta}}}_{u}$, using pure SU(3) gauge lattice QCD in $3+1$ dimensions. To accomplish this goal, we use large set appropriate operators, an anisotropic tadpole improved action, smearing techniques, solve generalized eigenvalue problem. Moreover, compare our results with Nambu-Goto string model evaluate possible tensions...