944 research outputs found
Phi meson production in near threshold proton-nucleus collisions
The cross section for production of Phi mesons in proton-nucleus reactions is
calculated as a function of the target mass. The decay width of the Phi meson
is affected by the change of the masses of the Phi, K+ and K- mesons in the
medium. A strong attractive K- potential leads to a measurable change of the
behavior of the cross section as a function of of the target mass. Comparison
between the kaon and electron decay modes are made.Comment: 4 pages, 1figure, new figure, new reference
Angular distribution and azimuthal asymmetry for pentaquark production in proton-proton collisions
Angular distributions for production of the pentaquark are
calculated for the collisions of polarized protons with polarized target
protons. We compare calculations based on different assumptions concerning spin
and parity () of the state. For a wide class of
interactions the spin correlation parameters describing the asymmetric angular
distributions are calculated up to 250 MeV above production threshold. The
deviations from the near threshold behavior are investigated.Comment: 8 pages, 5 figure
Calculations of K+, K- and phi Production in Near-Threshold Proton-Nucleus Collisions
K+, K- and \phi meson production in proton-nucleus (pA) collisions has been
calculated within a BUU transport model. It is shown that the nucleon-hyperon
strangeness transfer channel is essential. The role of three-body reactions has
been investigated within the medium. The targetmass dependence of
production is predicted to give important information on the in-medium
properties of all three mesons.Comment: Talk presented by H.W.B. at the Budapest 2004 workshop on 'Hot and
Dense Matter in Relativistic Heavy Ion Collisions', March 24-27, 2004,
Budapest, Hungar
Implementação de serviços web com Axis2.
A utilização de serviços web tem se consolidado ao longo dos anos, como uma estratégia para a integração de sistemas desenvolvidos em plataformas e ambientes distintos. O Ainfo é o sistema da Embrapa para a gestão do acervo documental e digital da empresa, e inclui o registro das metas de produção técnico-científico. O SIDE é o Sistema de Apoio à Decisão Estratégica e, entre outras funcionalidades, utiliza os dados de produção científica do Ainfo para mensurar o desempenho das unidades da Empresa Brasileira de Pesquisa Agropecuária (Embrapa). Dessa forma, faz-se necessário realizar a integração desses sistemas, de modo a automatizar o envio de dados do Ainfo para o SIDE com rapidez, qualidade e confiabilidade. O objetivo do trabalho é apresentar o mecanismo de integração entre os dois sistemas, sob o aspecto de envio de dados de publicações, por meio de serviços web
About a journey from basic science to societal impact
Dies lecture given by Prof.dr. Matthias Barz Professor fro Biopharmacy during the 447th Dies Natalis on Tuesday 8 February 2022 in the PieterskerkDrug Delivery Technolog
New method for extracting quasi-bound states from the continuum
A new parameter-free method is proposed for treatment of single-particle
resonances in the real-energy continuum shell model. This method yields
quasi-bound states embedded in the continuum which provide a natural
generalization of weakly bound single-particle states.Comment: 22 pages, 10 figure
Chemical equilibration of quarks and gluons at RHIC and LHC energies
We study chemical equilibration of quarks and gluons in central nuclear
collisions at RHIC and LHC energies. The initial quark and gluon densities are
taken from earlier studies as well as from recent perturbative QCD estimates
and are then evolved via rate equations coupled to longitudinally
boost-invariant fluid dynamics. We find that, for RHIC initial conditions, the
lifetime of quark-gluon matter is too short in order for the quark and gluon
number densities to chemically equilibrate prior to hadronization. In contrast,
at LHC energies chemical equilibration is complete before the system
hadronizes. Entropy production due to chemical equilibration can be as large as
30%.Comment: 30 pages (latex2e), 13 postscript figures, corrected one figure,
further analysis performed, to be published in NP
- …