[seminar] Catalina Curceanu: "Strangeness in the Universe?, An overview of the SIDDHARTA and AMADEUS experiments ...", 02.10.2014. u 14h

[Damir Pajic]

Poštovane kolegice i kolege,

U četvrtak 02.10.2014. u 14:00 h u predavaonici F201 (seminar na II. 
katu FO) seminar će održati Catalina Curceanu iz Laboratori Nazionali di 
Frascati dell’INFN, uz naslov "Strangeness in the Universe? An overview 
of the SIDDHARTA and AMADEUS experiments at the DAFNE collider at 
Frascati (Italy)"

Sažetak:

The low-energy QCD in the strangeness sector is still lacking 
fundamental experimental results in order to achieve a breakthrough in 
its understanding. Among these experimental results, the low-energy 
kaon-nucleon/nuclei interaction studies are playing a key-role, with 
important consequences going from particle and nuclear physics to 
astrophysics.
Combining the excellent quality kaon beam delivered by the DANE 
collider with new experimental techniques, as fast and very precise X 
ray detectors, like the Silicon Drift Detectors, and with the almost 
full acceptance charged and neutral particles KLOE detector, we have 
performed unprecedented measurements in the low-energy strangeness 
sector in the framework of SIDDHARTA and AMADEUS Collaborations.
The kaonic atoms, as kaonic hydrogen and kaonic deuterium, provide the 
isospin dependent kaon-nucleon scattering lengths from the measurement 
of X rays emitted in the de-excitation process to the fundamental 1s 
level of the initially excited formed atom. The most precise kaonic 
hydrogen measurement was performed by the SIDDHARTA collaboration, which 
realized, as well, the first exploratory measurement for kaonic 
deuterium ever. Additional important measurements of more complex 
systems, as kaonic helium 3 and kaonic helium 4, were as well done (the 
kaonic helium 3 was measured for the first time as well). Presently, a 
major upgrade of the setup, SIDDHARTA-2 is ready to perform in the near 
future a precise measurement of kaonic deuterium and other exotic atoms.
The kaon–nuclei interactions are being measured by the AMADEUS 
collaboration for kaon momenta smaller than 100 MeV/c by using the KLOE 
detector implemented in the central region with a dedicated setup. 
Preliminary results for the interaction of negatively charged kaons with 
  various type of nuclei will be shown, including an analyses of the 
still “mysterious” (1405). Future plans will be discussed.
DANE, with SIDDHARTA, SIDDHARTA-2 and AMADEUS, represents an 
opportunity which is unique in the world to, finally, unlock the secrets 
of the QCD in the strangeness sector and understand the role of 
strangeness in the Universe.

Cjeloviti oglas je u prilogu.

Lijep pozdrav,
Damir Pajić, voditelj Seminara FO

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