Jul 16 – 22, 2009
Kraków, Poland
Europe/Warsaw timezone

Measurement of the KS lifetimes and CPT symmetry tests in the neutral kaon system with quantum interferometry at KLOE

Jul 17, 2009, 3:30 PM
Large (Kraków, Poland)


Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Flavour Physics II. Flavour Physics


Dr Marco Dreucci (Istituto Nazionale di Fisica Nucleare)


A phi-factory offers the possibility to select pure kaon beams: neutral kaons from phi → KSKL are in fact produced in a well defined state (JPC=1--) and the detection of a kaon at large (small) times tags a KS (KL). This allow to perform precise measurement of kaon properties, as for example lifetime, and to study time evolution of neutral kaon system. In particular, studying the distribution of ∆t, the difference between the two neutral kaon decay times, where both kaons decay into π+π− pair, provides unique opportunities for testing quantum mechanics and CPT symmetry. Using the full 2004-2005 data sample (L=1.5 fb-1) collected with the KLOE detector at the Frascati-DAΦNE e+e− collider, we discuss very recent update of the results testing the validity of quantum mechanics and CPT invariance. Then, we are presently finalizing the determination KS lifetimes using ~1/3 the whole KLOE data set, where the proper time distribution of KS → π+π− provides a competitive measurement of lifetime.

Primary author

Dr Marco Dreucci (Istituto Nazionale di Fisica Nucleare)

Presentation materials