[seminar] Catalina Curceanu (Wed 22nd Apr, 14:00h, F-201)

[Ivica Smolic]

Dear colleagues,

I would like to invite to the following seminar,

Catalina Curceanu
(Laboratori Nazionali di Frascati dell'INFN, Roma, Italy)

"From strange nuclei to strange atoms and stars"
Experiments with low-energy kaons at the DA$\Phi$NE Collider in Italy

Wednesday, 22nd of April, 14:00h, F-201

The low-energy QCD, the theory describing the strong interaction, is 
still missing 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$\Phi$NE 
collider in Frascati (Italy) with new experimental techniques, as fast 
and very precise X ray detectors, like the Silicon Drift Detectors, and 
with the high 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. Presently, a major upgrade of the setup, SIDDHARTA-2 is 
being realized to perform in the near future a precise measurement of 
kaonic deuterium and of other exotic atoms.
The kaon–nuclei interactions are being measured by the AMADEUS 
collaboration for kaon momenta up to 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'' $\Lambda(1405)$. Future plans will be discussed.
The experiments at the DA$\Phi$NE collider 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, from nuclei to the stars.

Best regards,

Ivica Smolić
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