CFTP regularly organizes scientific seminars (at
least one per week), and it receives many foreign visitors, either
for short periods (of about one week) or for more extended periods
(up to months).
CFTP shares an excellent library
with advanced books covering its research areas.
Our Center has always been ranked as "Excellent"
in all evaluations promoted by the Portuguese Ministry of
Science in agreement with reports of International Counseling
Committees and jurys composed by leading scientists.
CFTP is located in the Campus of the Instituto Superior Técnico of the University of Lisbon.
The Centre is organized as follows.
[ new@ | hep-ph | hep-th | nucl-th | nucl-ex | gr-qc | astro-ph | hep-lat | hep-ex | [ search | SPIRES | arXiv | ADS ]
The Home Institute of
CFTP is Instituto
Superior Técnico, (Técnico), in Lisbon. If you come from
the Airport,
maybe you would like to visit the
Airport site, or if by train the Railway
site .
From the airport to the
Tecnico campus and CFTP, you can take a taxi (and expect to pay around 20
euros), the Underground/Metro
(stop Alameda) or the Bus.
Take a look at the WEST-side of the Tecnico
Campus + Metro-Saldanha-stop, or at the EAST-side of the Tecnico
Campus + Metro-Alameda-stop.
The campus of Técnico has
four gates: Alameda, Antonio Jose de Almeida, Alves
Redol, Rovisco Pais.
The best Metro stop is
Alameda, although the one at Saldanha
is also whithin walking distance. If you get out at Alameda
our campus is not far, just at the top of the hill (to the West). To
ride the Metro you can buy tickets at the vending machines inside any
of the stations. You may also take Bus 744 from the airport to Saldanha.
To ride the buses, you buy a ticket from the driver: normal buses
inside Lisbon, fare 2 Euro. Be sure to have small change and coins with
you. There are also special tickets for a whole day and others. Find
out more at the public
bus company of Lisbon, Carris.
Other interesting routes: Bus 736 stops at Saldanha and goes
all the way to the Cascais-Estoril railway station (Cais do
Sodré) near the river Tagus. It stops at the main avenues and
squares in the centre of Lisbon, e.g. Avenida da Républica, Saldanha,
Marquês de Pombal, Avenida da Liberdade, Rossio
and Praça do Comércio.
If you stay in Lisbon for long, it is less expensive (instead of
buying tickets on the Bus) to acquire a "Passe Social" Lisboa Viva,
which is a overall transport card with identification. Each month,
your Passe Social can be updated on a machine. This enables you to use
the Bus, Metro and Railway on pre-defined zones (including or not
including weekends) according to the price.
Hotels: Our visitors are usually housed in one of the
hotels near to the Campus; e.g. Hotel A.S. Lisboa is 50 - 100 m away,
while Hotel Turim Alameda is just next door, 10 m away.
Restaurants: Just outside the Campus you may find
good restaurants, most of them serving lunch at very acceptable
prices, e.g. at 9 - 15 Euro per person. Inside the building, there are
also cheap restaurants/cantines/cafetarias. Here the meals are even cheaper
(around or less than 5 Euro).
Find more useful information in portugal.com
or www.justportugal.org
Discription: Em Julho de 2012 foi anunciado no CERN a descoberta da partícula de Higgs, prevista em 1964 por Higgs, Englert e Brout. Os dois primeiros viriam a ter o Premio Nobel de 2013. Esta partícula corresponde a um campo de spin zero, necessário para dar massa às restantes partículas do Modelo Standard das Interacções Electrofracas. Não há nada de fundamental na teoria que determine o número de partículas escalares. Assim, ao mesmo tempo que se determinam as propriedades da partícula encontrada, é necessário procurar que alterações se prevêem caso existam mais partículas escalares; os chamados modelos de multi-Higgs. Neste projecto, pretende-se explorar as consequências para o LHC da presença de mais do que um Higgs. O projecto poderá ter mais interface com as experiências ou ser mais teórico, consoante os interesses da/o aluna/o.
Discription: Uma das questões fundamentais ainda não resolvidas na física de partículas é explicar porque o nosso Universo é dominado por matéria e não observamos antimatéria nele. A observação desta assimetria matéria-antimatéria constitui também uma evidência da existência de física para além do modelo padrão das interacções fortes e electrofracas. Na tentativa de encontrar uma solução para este problema, várias abordagens e modelos teóricos têm sido propostos ao longo dos últimos anos. Em particular, a leptogénese é um dos mecanismos mais apelativos para explicar esta assimetria, dada a sua relação estreita com a física de neutrinos. Neste projecto, pretende-se abordar algumas das questões em aberto neste campo.
Discription: A origem das massas e misturas dos fermiões constitui um dos problemas fundamentais ainda não resolvidos na física de partículas. Uma possibilidade de abordar esta questão consiste em estender o modelo padrão das interacções electrofracas e fortes postulando a existência de simetrias (horizontais) de familia. Em particular, o uso de simetrias discretas de sabor tem-se tornado popular pelo poder preditivo destas para explicar os angulos de mistura medidos recentemente nas experiências de oscilações de neutrinos. Algumas das questões em aberto neste campo serão abordadas neste projecto.
Discription: There are several good motivations to extend the scalar sector of the Standard Model (SM). Models with an extended scalar sector usually have new sources of CP violation. It is already established that the SM cannot account for the observed baryon asymmetry of the Universe requiring new sources of CP violation. Furthermore some of these extensions may also provide good dark matter candidates. In addition, the existence of a richer scalar sector has important implications for flavour physics.The Large Hadron Collider (LHC) at CERN continues its experimental quest for Physics Beyond the Standard Model after its recent major discovery of one Higgs boson. The future of this field is exciting! The directions of the research work will depend on specific interests of the student. The student will start by being introduced to this important topic of research.
Discription: In the standard model, neutrinos are strictly massless. As a result, one can conclude that the observation of neutrino masses and oscillations provides clear evidence for Physics Beyond the SM. With massive neutrinos there may be CP violation in the leptonic sector, unlike in the standard model where there is neither mixing nor CP violation in the leptonic sector. The fact that neutrinos have no electrical charge allows for more terms to be present in the Lagrangian than in the quark sector, and this has extremely important phenomenological implications. In particular it allows for a new mechanism to explain why there is matter in the Universe rather than just radiation. Without matter life would not be possible. This new mechanism is called Leptogenesis. The directions of the research work will depend on specific interests of the student. The student will start by being introduced to this important topic of research.
Discription:
We expect to find New Physics at the LHC-CERN. There is no known
fundamental principle why the Universe should have only 4
dimensions. Extra dimension (ED) models are inspired by string
theory, which itself is based on the existence of additional spatial
dimensions. As known, string theory is a main candidate for an
all-including quantum theory which allows for gravity, thus unifying
all elementary particle interactions. ED models have some advantages
over supersymmetric theories (which is another serious candidate for
New Physics). Besides the fact that they lead to the unification of
the gauge couplings, either at high 10^16 GeV scales for small
warped extra dimension models, or at the lower TeV scales for large
flat ED models, they also address the long standing puzzle of the
gauge hierarchy problem, i.e. the huge discrepancy between the
gravitational scale and the electroweak scale. Furthermore, there is
a viable Kaluza-Klein WIMP candidate for the dark matter of the
universe. In addition, ED models explain the large mass hierarchy of
the different types and generations of the SM fermions through a
geometrical mechanism. But what are the finer points of the fermion
mass hierarchy, mixing and CP violation, within ED models?
We also shall explore New Physics, in particular models inspired on
ED, with vector-like (extra) quarks and multi-Higgs models.
Discription: For several decades, particle physicists have been searching for hints of New Physics, a fundamental theory which must replace the Standard Model we currently have. Up to now, no definitive New Physics signals have been detected. In December 2015, the two LHC collaborations reported a peculiar excess in the two-photon channel around 750 GeV, and it resulted in a hurricane of theoretical publications. Hundreds of theoretical models could accommodate this signal, but without further data, we cannot safely distinguish them. However some information can be extracted even right now on purely kinematical basis. If two photons appear in (cascade) decays of hypothetical heavy particle(s), the exact invariant mass profile of the excess depends on the phase space available and on the number of accompanying undetected particles. In this project, we will derive the invariant mass shapes for various assumptions on decay multiplicity, and check which one gives a better fit to the data. This project will allow a student to obtain a concrete scientific result and to quickly jump into an activity at the bleeding edge of particle physics.
In spite of the successes of the SM, there are still three striking experimental observations for which it offers no answer: neutrino masses, the baryon asymmetry of the Universe and the observed dark matter (DM) for which it offers no candidate. These three observations strongly suggest the need of new physics. Our research objectives, are therefore to explore extensions of the SM that can explain these evidences. There are also important questions from the theoretical side:
To answer these
questions research at CFTP includes many hot topics in theoretical
particle physics and cosmology : Fermion Masses & Mixing, CP
Violation, Baryogenesis, Leptogenesis, Neutrino Physics, B Physics,
Supersymmetry, LFV, Extra Dimensions, Cosmology, Dark Matter &
Dark Energy, Inflation, Nuclear Physics, Hadronic Matter, Chiral
Symmetry, Confinement. Please see
also our list of publications. We have also a strong
interaction with theoretical and experimental groups at LIP and at
CERN.
These questions, at the frontier of the field, are aligned with the
big experimental effort being done or planed for the next decade, in
particular at CERN and JLab. These questions are connected in many
ways and we organize ourselves in four main lines of research that
cover all the above topics.
Research Team: G.C.
Branco, D. Emmanuel-Costa, R. González Felipe, F. Joaquim, L.
Lavoura, M.N. Rebelo, J.P. Silva, J. I. Silva-Marcos, J. C. Romao
and Long Term Visiting Professor F. Botella (U.Valencia)
Since the SM gauge group does not determine the number of scalars,
the pressing phenomenological question is to determine how many
fundamental scalars there are and what their exact nature is. An
extended Higgs sector may give new sources of CP violation with
important implications for Neutrino Physics and Leptogenesis. It can
allow for the possibility of having spontaneous CP violation, and in
some extensions together, with the inclusion of at least one
vectorial quark, allow for a common origin for all CP violations. It
can also provide a viable DM candidate. Included in this topic are
the study of the origin of fermion masses and mixing, CP violation
at B factories, baryogenesis, Physics at colliders and flavor
Physics.
Research Team: G.C.
Branco, D. Emmanuel-Costa, R. González Felipe, F. Joaquim, L.
Lavoura ,João Pulido , M.N. Rebelo, J. C. Romão, J.I.
Silva-Marcos and Long Term Visiting Professor J. W. F. Valle
(U.Valencia)
Oscillation experiments have achieved high precision in determining
the neutrino mass and mixing pattern. The most important new result
is the theta13 mixing angle recently measured by the Daya-Bay and
RENO reactor experiments. The fact that theta13 is not close to zero
may allow for the discover of CP violation in the lepton sector. The
old and long standing mystery regarding the origin of fermion masses
and mixing seems now even more intriguing: why are the neutrino
masses very suppressed and mixings large, in contrast with what is
observed in the quark sector. Included in this topic are the study
of neutrino-mass generation mechanisms, neutrino Oscillations,
CP-Violation in the Leptonic sector and Baryogenesis through
leptogenesis. Grand Unified Theories, with an extended Higgs sector
are also under study in this topic, as well as models dor Dm from
the Higgs sector.
Research Team: G.C.
Branco, D. Emmanuel-Costa, R. González Felipe, F. Joaquim, L.
Lavoura, P.A. Parada ,João Pulido , M.N. Rebelo, J.P. Silva,
J.I. Silva-Marcoss and Long Term Visiting Professor F. Botella
(U.Valencia)
The origin of fermion masses and mixing and of CP violation are some
of the major outstanding problems in particle physics. These members
of CFTP have been working actively in CP violation, as well as in
attempts at understanding the observed patterns of fermion masses
and mixing, both in the quark and in the leptonic sector. We are
especially interested in pursuing the following topics of research:
Family symmetries and patterns of neutrino mass matrices;
Baryogenesis through leptogenesis; CP violation at B factories;
Physics at colliders.
Research Team: J.C.
Romão, G.C. Branco, F. Joaquim, D. Emmanuel-Costa, L. Lavoura
Supersymmetry (SUSY) allows for deviations from the SM that are very
small at the electroweak scale, while offering a solution to the
hierarchy problem and provide a DM candidate. Also SUSY seesaw
models offer an explanation for the smallness of the neutrino masses
and open a window into charged LFV. The experimental search for SUSY
plays an important role in the analysis of the LHC data. The present
indication of a light Higgs boson with mass around 125 GeV is
compatible with a heavy spectrum. The next phase of LHC at 14 TeV
will be crucial to find out if this beautiful idea plays a role at
present energies. Included in this topic are supersymmetric
unification, supersymmetric neutrino-mass generation mechanisms, CP
violation in supersymmetry, Lepton-flavour violation (LFV), and Drak
Matter.
Research Team: T. Peña and Alfred Stadler, also in collaboration with
Jefferson Laboratory
In this area, our general objective is to create innovative
theoretical methods to interpret data from large experimental
infrastructures (e.g. at Jlab, HADES, PANDA/FAIR, LHCb). Meson and
baryon electromagnetic form factors are among the most fundamental
observables in hadron physics and they will be a focus of our
activity. They are essential for the puzzle of connecting the
observed properties of mesons and baryons and the underlying QCD
quark-gluon dynamics. Also the interpretation of the nuclear matter
emissivity from experiments of elementary reactions and of heavy ion
collisions, needs a detailed knowledge of those form factors in the
timelike region. Our approach in Minkowski space makes our group
unique because it enables calculations of transition form factors in
the timelike region, where lattice QCD and the Dyson-Schwinger
approach do not work yet. We aim to contribute to the new accuracy
era made possible by the LHC. The interpretation of recent data from
the LHCb detector on exotic quark structures, as tetraquarks, and on
quarkonia states from the CMS detector, demands precision
spectroscopic calculations that supersede the old generation of
quark models of the 1980's.
|