29,897 research outputs found
Hadron Structure and Modern Spectroscopy
The colour, flavour, spin and J^PC of glueballs and hybrid mesons and baryons
are constructed in an intuitive manner in both the gluon counting and adiabatic
definitions. Glueball decay, production and mixing and hybrid meson decay
selection rules and production are clarified.Comment: Invited Lectures at the Advanced School on Quantum Chromodynamics
2000 (QCD2000), Benasque, Huesca, Spain, 3 - 6 July 2000. 26 pages, LaTeX, 4
(encapsulated) postscript figure
Four-quark stability
The physics of charm has become one of the best laboratories exposing the
limitations of the naive constituent quark model and also giving hints into a
more mature description of meson spectroscopy, beyond the simple
quark--antiquark configurations. In this talk we review some recent studies of
multiquark components in the charm sector and discuss in particular exotic and
non-exotic four-quark systems, both with pairwise and many-body forces.Comment: 6 pages. Article based on the presentations by J. Vijande and J.-M.
Richard at the Fifth Workshop on Critical Stability, Erice, Sicil
Production of exotic isotopes in complete fusion reactions with radioactive beams
The isotopic dependence of the complete fusion (capture) cross section is
analyzed in the reactions
Xe+Ca with stable and
radioactive beams. It is shown for the first time that the very neutron-rich
nuclei W can be reached with relatively large cross sections by
complete fusion reactions with radioactive ion beams at incident energies near
the Coulomb barrier. A comparison between the complete fusion and fragmentation
reactions for the production of neutron-rich W and neutron-deficient Rn
isotopes is performed.Comment: 13 pages, 6 figures, accepted in PR
Respectability, morality and disgust in the night-time economy: exploring reactions to âlap danceâclubs in England and Wales
The night-time economy is often described as repelling consumers fearful of the âundesirable Othersâ imagined dominant within such time-spaces. In this paper we explore this by describing attitudes towards, and reactions to, one particularly con- tentious site: the âlap danceâ club. Often targeted by campaigners in England and Wales as a source of criminality and anti-sociality, in this paper we shift the focus from fear to disgust, and argue that Sexual Entertainment Venues (SEVs) are opposed on the basis of moral judgments that reflect distinctions of both class and gender. Drawing on documentary analysis, survey results and interview data collected during guided walks, we detail the concerns voiced by those anxious about the presence of lap dance or striptease clubs in their town or city, particularly the notion that they âlower the toneâ of particular streets or neighbourhoods. Our conclusion is that the opposition expressed to lap dance clubs is part of an attempt to police the bound- aries of respectable masculinities and femininities, marginalizing the producers and consumers of sexual entertainment through âspeech actsâ which identify such enter- tainment as unruly, vulgar and uncivilized. These findings are considered in the light of ongoing debates concerning the relations of morality, respectability and disgust
How would tourists use Green Spaces? Case Studies in Lisbon
EntretextosThis report provides in a relative condensed format the results of small-scale study undertaken in Lisbon during the
Meeting of the CyberParks Project (www.cost.eu/COST_Actions/tud/Actions/TU1306). CyberParks is a COST Action
coordinated by the Universidade LusĂłfona at the CeiED - Interdisciplinary Research Centre for Education and
Development. The Project aims at creating a research platform on the relationship between Information and
Communication Technologies (ICT) and the production of public open spaces, and their relevance to sustainable urban
development. The impacts of this relationship are being explored from social, ecological, urban design and technological
perspectives.
Based on the supposition that the participants of the Meeting are tourists visiting Lisbon, a survey was carried out on
the topic how people actually use and how they would use public spaces. This survey is also the first approach to the
case study areas chosen in Lisbon: Parque Quinta das Conchas and Jardim da Estrela. Both green spaces will be subject
of further studies in the forthcoming years.
This study employed (1) a questionnaire for measuring the userâs experience and preferences, and (2) two different
tracking devices that utilise GNSS (Global Navigation Satellite Systems), in our case the GPS for satellite positioning
technologies. It also presents the results of a study on the relevance of wi-fi in Lisbonâs public spaces. Even considering
that the surveys in Lisbonâs green spaces are a first exercise within the work programme of CyberParks they show
important outcomes. On the one hand, regarding the technologies used and their potential for research and on the
other hand the findings about Lisbonâs green spaces. It should be noted that the conducted surveys and the gathered
data are statistically not representative, but can be characterised as an empirical case and as a showcase, as how
tourists tend to use a green space. The results shows that surveys benefit from multiple research methods and from
combining insights.Este relatĂłrio apresenta, em formato condensado, os resultados de um estudo de pequena escala realizado em Lisboa
durante o Seminårio do Projeto CyberParks. CyberParks é uma Ação COST coordenada pela Universidade Lusófona/CeiED
- Centro de Estudos Interdisciplinares em Educação e Desenvolvimento. O projeto visa a criação de uma plataforma de
debate sobre a relação entre as Tecnologias de Informação e Comunicação (TIC) e a produção de espaços pĂșblicos, e
da sua relevùncia para o desenvolvimento urbano sustentåvel. Os impactos dessa relação estão a ser explorados a partir
de perspetivas sociais, ecolĂłgicas, tecnolĂłgicas e de desenho urbano.
Na sua etapa exploratória, este estudo assenta na suposição de que os participantes do Seminårio são turistas de visita
a Lisboa. A partir dos dados recolhidos pelos investigadores envolvidos na ação COST, foi realizada uma anålise à forma
como diferentes indivĂduos usam, e como poderĂŁo usar, diferentes espaços pĂșblicos verdes. Este estudo apresenta,
portanto, a primeira abordagem Ă s ĂĄreas de estudos selecionadas em Lisboa. SĂŁo elas o Parque Quinta das Conchas e
o Jardim da Estrela. Ambos os espaços verdes serão objeto de novos estudos nos próximos anos. Neste primeiro estudo
exploratĂłrio foram empregues: (1) um questionĂĄrio, para aferir a experiĂȘncia de um potencial utilizador e as suas
preferĂȘncias, e (2) dois dispositivos diferentes de rastreamento que utilizam tecnologia GNSS (Sistemas de Navegação
Global por Satélite) e, no nosso caso, o GPS para as tecnologias de posicionamento por satélite. Ele também apresenta
os resultados de um estudo realizado sobre a relevĂąncia do wi-fi em espaços pĂșblicos na cidade de Lisboa.
Mesmo considerando que os estudos realizados nos espaços verdes representam um primeiro exercĂcio no Ăąmbito do
programa de trabalho do CyberParks em Lisboa, sĂŁo aqui revelados resultados importantes. Por um lado, o recurso Ă s
tecnologias utilizadas e seu potencial para a investigação e, por outro lado, os resultados sobre a vivĂȘncia dos espaços
verdes. Deve-se notar que os dados recolhidos nĂŁo sĂŁo estatisticamente representativos, mas evidenciam um caso
empĂrico de como turistas tendem a usar um espaço verde urbano. A combinação do questionĂĄrio com novos mĂ©todos
digitais resultou num grande ganho de conhecimento, recobrindo as ĂĄreas de estudo sob a perspetiva de um turista,
para além de maiores informaçÔes sobre as potencialidades e limites da tecnologia digital como ferramenta de
investigação. Os resultados mostram que a investigação no campo social pode se beneficiar da combinação de vårios
métodos e técnicas
Mass Predictions for Pseudoscalar Charmonium and Bottomonium Hybrids in QCD Sum-Rules
Masses of the pseudoscalar charmonium and bottomonium
hybrids are determined using QCD Laplace sum-rules. The effects of the
dimension-six gluon condensate are included in our analysis and result in a
stable sum-rule analysis, whereas previous studies of these states were unable
to optimize mass predictions. The pseudoscalar charmonium hybrid is predicted
to have a mass of approximately 3.8 GeV and the corresponding bottomonium
prediction is 10.6 GeV. Calculating the full correlation function, rather than
only the imaginary part, is shown to be necessary for accurate formulation of
the sum-rules. The charmonium hybrid mass prediction is discussed within the
context of the X Y Z resonances.Comment: 10 pages, 7 embedded figures. Analysis extended and refined in v
Light Hadron Spectroscopy: Theory and Experiment
Rapporteur talk at the Lepton-Photon Conference, Rome, July 2001: reviewing
the evidence and strategies for understanding scalar mesons, glueballs and
hybrids, the gluonic Pomeron and the interplay of heavy flavours and light
hadron dynamics. Dedicated to the memory of Nathan Isgur, long-time
collaborator and friend, whose original ideas in hadron spectroscopy formed the
basis for much of the talk.Comment: to be published in "Lepton Photon 2001 Conference Proceedings" (World
Scientific Publishing), 19 pages with 6 figure
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