Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-11-16
Nuovo Cim. C 34, 323 (2011)
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
Proceedings of the Scineghe2010 Conference, Trieste, September 2010
Scientific paper
From the study of a sample of about 62.3 million well reconstructed K0S decays recorded by the KLOE detector at the DAFNE accelerator in Frascati, the lifetimes of K0S mesons parallel and antiparallel to the direction of motion of the Earth with respect to the Cosmic Microwave Background reference frame have been studied. No difference has been found, and a limit on a possible asymmetry of the lifetime with respect to the CMB has been set at 95% C.L.: A < 0.98 x 10-3. This is presently the best experimental limit on such quantity, and it is smaller of the speed, expressed in natural units, of the Solar System with respect to the CMB. The present limit might constrain possible Lorentz-violating anisotropical theories.
Antonelli Mario
de Angelis Alessandro
Dreucci Marco
Maria Michela de
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