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Seminars/Colloquia
Universe Colloquium: Experimental studies of strong interaction in exotic atoms
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Europe/Berlin
Cluster building (seminar room (basement))
Cluster building
seminar room (basement)
Description
The QCD predictions in the regime of low energy transfer has been tested experimentaly studying different exotic versions of the hydrogen atom.
The pionium is the simplest system for studying the strong interaction effects, a pi+ pi- atomic state bound mainly by Coulomb force and affected by the strong interaction between the pions. Pionium has a short lifetime, predicted by chiral perturbation theory, and has been accurately measured experimentally by the DIRAC experiment at CERN.
On the strangeness sector, the kaonic hydrogen, an atom in which a kaon replaces the orbiting electron, is used for testing our knowledge of the kaon-nucleon force. The SIDDHARTA experiment has measured with high precision the shift and width due to the strong interaction in the X-ray transitions to the 1s level of different kaonic nuclei.
The pionium is the simplest system for studying the strong interaction effects, a pi+ pi- atomic state bound mainly by Coulomb force and affected by the strong interaction between the pions. Pionium has a short lifetime, predicted by chiral perturbation theory, and has been accurately measured experimentally by the DIRAC experiment at CERN.
On the strangeness sector, the kaonic hydrogen, an atom in which a kaon replaces the orbiting electron, is used for testing our knowledge of the kaon-nucleon force. The SIDDHARTA experiment has measured with high precision the shift and width due to the strong interaction in the X-ray transitions to the 1s level of different kaonic nuclei.