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Dr Catalina Oana Curceanu (LNF)14/05/2014, 09:00
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Dr Johann Marton (Stefan Meyer Institute)14/05/2014, 09:15An international network for HadronPhysics in Horizon is proposed to join groups working in studies on open issues in strangeness and charm physics. The network IMPACTs includes experimental and theoretical studies. An overview of the research topics of IMPACTS will be given in the talk.Go to contribution page
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Prof. Avraham Gal (Hebrew University, Jerusalem)14/05/2014, 09:30In this talk I will review recent studies of kaonic atoms, few-body kaonic quasibound states and kaonic nuclei, with emphasis on implementing the sub-threshold energy dependence of the Kbar-N interaction in chiral interaction models that are consistent with the SIDDHARTA kaonic hydrogen data. Remarks will be made on the possible role of the p-wave Sigma(1385) resonance with respect to that...Go to contribution page
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Jean-Marc Richard (IPNL)14/05/2014, 10:00Our current knowledge of the baryon--baryon interaction suggests that the dineutron (n,n) and its strange analogue (Lambda,N) are unstable. In contrast, the situation is more favourable for the strange three-body system (n,n,Lambda), and even better for the four-body system T=(n,n,Lambda,Lambda) with strangeness -2, which is more likely to be stable under spontaneous dissociation. This new...Go to contribution page
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Ignazio Bombaci (PI)14/05/2014, 10:30
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Alessandro Drago (FE)14/05/2014, 11:30The existence of neutron stars with masses of 2 solar masses requires a stiff equation of state at high densities. On the other hand, the necessary appearance also at high densities of new degrees of freedom, such as hyperons and ? resonances, can lead to a strong softening of the equation of state with resulting maximum masses of 1.5 solar masses and radii smaller than 10 km. Hints for the...Go to contribution page
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Mihail Antoniu Iliescu (LNF)14/05/2014, 12:00
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Mr Kristian Piscicchia (LNF)14/05/2014, 12:30The AMADEUS experiment deals with the investigation of the low-energy kaon-nuclei hadronic interaction at the DA$\Phi$NE collider at LNF-INFN, which is fundamental to solve longstanding questions in the non-perturbative strangeness QCD sector. AMADEUS step 0 consisted in the reanalysis of 2004/2005 KLOE data, exploiting $K^-$ absorptions in $H$, ${}^4He$, ${}^{9}Be$ and ${}^{12}C$, leading...Go to contribution page
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Ivana Tucakovic (LNF)14/05/2014, 14:30One of the most interesting aspects of low energy QCD in a strangeness sector is to understand how hadron masses and interactions change in the nuclear environment. The antikaon-nucleon potential is investigated searching for signals from possible bound kaonic clusters. The existence of such objects is very debated, and it would open the possibility for the formation of very dense baryonic...Go to contribution page
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Giuseppe Alberti (Univ.Roma1)14/05/2014, 15:00Systems of selfgravitating Fermions constitute a topic of great interest in astrophysics, due to the wide range of applications, and are used also to explain dark matter in galaxies and clusters of galaxies. Here, we study the gravitational equilibrium of spherical models describing a semidegenerate collisionless gas. The Fermi-Dirac distribution function, modified by a cutoff term in order to...Go to contribution page
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Martina Donnari (Univ. Sapienza)14/05/2014, 15:30Dark energy, discovered by observations of the SN Ia at redshift z<1, affects the large scale stellar structures in the Universe, like the galaxy clusters. Being the observed velocities of the galaxies inside a cluster largely smaller than the light velocity, we can derive, and numerically solve, the gravitational equilibrium equation in presence of dark energy by considering the Newtonian...Go to contribution page
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Giacomo FRAGIONE (Univ. Sapienza)14/05/2014, 16:30Thermodynamics is very important in the dynamical evolution of globular clusters. The effects of the stellar encounters and the evaporation of stars due to the presence of the tidal forces of the galaxy suggest the possibility of considering a thermodynamical equilibrium and therefore a new treatment including the statistical mechanics. It is possible to construct equilibrium models with a...Go to contribution page
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Prof. Marco Merafina (University of Rome La Sapienza)14/05/2014, 17:00In the analysis of the evolution of globular clusters, stellar encounters strongly contribute in phase space mixing of stellar orbits. In this scenario, thermodynamics plays a central role in the gravitational equilibrium and stability of the clusters, being binary relaxation time shorter than the age of such systems. On the other hand, the observations of luminosity profiles of globular...Go to contribution page
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14/05/2014, 17:30
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Systems of selfgravitating Fermions constitute a topic of great interest in astrophysics, due to the wide range of applications, and are used also to explain dark matter in galaxies and clusters of galaxies. Here, we study the gravitational equilibrium of spherical models describing a semidegenerate collisionless gas. The Fermi-Dirac distribution function, modified by a cutoff term in order to...Go to contribution page
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Alessandro Drago (FE)Part 2The existence of neutron stars with masses of 2 solar masses requires a stiff equation of state at high densities. On the other hand, the necessary appearance also at high densities of new degrees of freedom, such as hyperons and ? resonances, can lead to a strong softening of the equation of state with resulting maximum masses of 1.5 solar masses and radii smaller than 10 km. Hints for...Go to contribution page
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Dark energy, discovered by observations of the SN Ia at redshift z<1, affects the large scale stellar structures in the Universe, like the galaxy clusters. Being the observed velocities of the galaxies inside a cluster largely smaller than the light velocity, we can derive, and numerically solve, the gravitational equilibrium equation in presence of dark energy by considering the Newtonian...Go to contribution page
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In the dynamical evolution of globular clusters, stellar encounters strongly contribute in phase space mixing of stellar orbits. In this scenario, thermodynamics plays a central role in the gravitational equilibrium and stability of the clusters. On the other hand, the observations of luminosity profiles suggest a unique distribution function allowing the study of the evolution as a sequence...Go to contribution page
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Prof. Marco Merafina (University of Rome La Sapienza)In the analysis of the evolution of globular clusters, stellar encounters strongly contribute in phase space mixing of stellar orbits. In this scenario, thermodynamics plays a central role in the gravitational equilibrium and stability of the clusters, being binary relaxation time shorter than the age of such systems. On the other hand, the observations of luminosity profiles of globular...Go to contribution page
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Ivana Tucakovic (LNF)One of the most interesting aspects of low energy QCD in a strangeness sector is to understand how hadron masses and interactions change in the nuclear environment. The antikaon-nucleon potential is investigated searching for signals from possible bound kaonic clusters. The existence of such objects is very debated, and it would open the possibility for the formation of very dense baryonic...Go to contribution page
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Mr Kristian Piscicchia (LNF)The AMADEUS experiment deals with the investigation of the low-energy kaon-nuclei hadronic interaction at the DA$\Phi$NE collider at LNF-INFN, which is fundamental to solve longstanding questions in the non-perturbative strangeness QCD sector. AMADEUS step 0 consisted in the reanalysis of 2004/2005 KLOE data, exploiting $K^-$ absorptions in $H$, ${}^4He$, ${}^{9}Be$ and ${}^{12}C$, leading...Go to contribution page
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