To celebrate the 65th birthday of Emílio Ribeiro, a conference will be held at the Instituto para a Investigação Interdisciplinar da Universidade de Lisboa (former names were Instituto de Física e Matemática and Complexo Insterdisciplinar II) in Septembr 6-7, 2017.
Scientific contributions of Emílio Ribeiro:
Quantum chromodynamics (QCD) is a theory describing the fundamental strong force that mediates quarks and gluons. These are elementary particles that make up the proton, the neutron and other hadrons. QCD uses quantum field theory methods applied to a non-abelian gauge theory with SU(3) symmetry. The quarks have color charge, and the gluons, also possessing color charge, are the carriers of the strong force between the quarks and between themselves. Two important properties of QCD should be mentioned. First, there is confinement, i.e., the quarks are appropriately confined because the force between them increases with the distance of their separation. Second, there is asymptotic freedom, i.e., at very high energies, the quarks and gluons are weakly bound to each other and so one can understand with some ease the properties of the quark-gluon plasma that forms at these high energies. This property has been mathematically establsihed by the theoretical physicists David Politzer, Frank Wilczek and David Gross, a result that gave them the Nobel Prize in Physics in 2004. QCD is a very important part of the standard model of particle physics, a models that explains the elementary particle world and its interactions.
Emílio Ribeiro has dedicated his scientific life to QCD. His main achievements are:
In 1978 he finished his PhD thesis at the University of Oxford under the supervision of Richard Dalitz. A highlight from the thesis was a paper that first appeared as a preprint of the Lisbon Institute of Scientific Investigations (CFMC-E-6-78) entitled "Microscopic calculation of the repulsive core in the elastic nucleon-nucleon scattering" where he derived the arising of a strong hard core repulsion as the result of the interplay between Pauli principle and the chromomagnetic interaction. This was later published in 1980 in Zeitschrift für Physik C.
In 1981, while at Nijmegen, Holland, he developed an universal mathematical method to calculate the space overlap kernel needed for hadron scattering and decay. This was published in 1982 in Physical Review D. This mathematical tool was instrumental to predict in a 1986 paper, published in Zeitschrift für Physik C, a set of low lying scalar resonances, the sigma and the kappa. The sigma resonance was to be experimentally established much latter. They were a consequence of coupled channels. The model was a phenomenological success, although it was quite unsatisfactory from the theoretical point of view as it failed to accommodate the physics of chiral symmetry.
In 1990, in a series of three papers, published in Physical Review D, he together with his PhD student Pedro Bicudo, layered in analogy to superconductivity, the theory of vacuum-like quark coherent states. This idea, in turn, led to the microscopic implementation of the mechanism for the spontaneous breaking of chiral symmetry, thus allowing to describe all the known low energy theorems. A full fledged, quark field, chiral complying calculation of the rho and phi resonances, arising from coupled channel calculations was also calculated and discussed.
In 1999 a paper showing that spontaneous breaking of chiral symmetry usually triggers the generation of a measurable anomalous magnetic moment for light-quarks was published in Physical Review C.
From 2000 onward he has remained interested in the field and has continued publishing in major journals and displaying the results in international conferences.
Academic and Administration contributions of Emílio Ribeiro:
Another side of Emĺio Ribeiro is his interest for science administration. Here he also has many achievements. They are:
In 1985 he was responsible for the promotion and co-project of the new building for the Instituto de Física e Matemática (IFM), see photo. The built area of the building is 5000 m². The architect Nuno Leonidas was responsible for the architecture project.
From 1986 to 1990 he was the director of the I&D magazine Futuro.
In 1990 he was the promoter, together with the journalist Nascimento Rodrigues and the researcher Gabriel Feio, of the ICTPOL, a nation wide research institution for materials.
From 2004 to 2008 he was President of the research centre CFIF-Centro de Física das Interacçoes Fundamentais.
In 2007 he was a member of the Coordinating Committee for the Scientific Council of Instituto Superior Técnico.
In 2008 he was elected member of the Statutory Assembly of the Instituto Superior Técnico (2008) and in this condition was author of the Bill of Rights and Rules of Conduct for the Technical University of Lisbon in 2009.
From 2009 to 2012 and 2012 to 2013 he was elected member of the Instituto Superior Técnico Council and in this condition was co-author of the strategy document for the fusion the Technical University of Lisbon with the University of Lisbon to form the new University of Lisbon in 2012. He was also a member of the technical committee for the redaction of the new statutes for the new University of Lisbon in 2013.
From 2013 to 2017 he was elected Council member of the University of Lisbon.
In 2014 he founded with other colleagues the research centre for advanced materials, Centro de Física e Engenharia de Materiais Avançados (CEFEMA).
In 2017 he founded with other colleagues the the national Association for the Physics of Strong Interactions (AFIF).
From 2017 onwards many new acomplishments are expected.
If you are interested attending the conference, please register before September 1st.
Venue: Instituto para a Investigação Interdisciplinar da Universidade de Lisboa, Avenida Gama Pinto 2, 1649-026 Lisboa.
Conference Lunch: On Thursday, 7 September 2017, there will be a conference lunch at the Institute's restaurant.
Pedro Brogueira (CEFEMA, Instituto Superior Técnico)
José Sande Lemos (CENTRA, Instituto Superior Técnico)
Dário Passos (CENTRA, Instituto Superior Técnico)
Pedro Ribeiro (CEFEMA, Instituto Superior Técnico)
Pedro Sacramento (CEFEMA, Instituto Superior Técnico)
Vítor Rocha Vieira (CEFEMA, Instituto Superior Técnico)