First observation of quantum interference in the process $\phi \to K(S) K(L) \to \pi^+ \pi^- \pi^+ \pi^-$: A Test of quantum mechanics and CPT symmetry - INSPIRE

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First observation of quantum interference in the process $\phi \to K(S) K(L) \to \pi^+ \pi^- \pi^+ \pi^-$ : A Test of quantum mechanics and CPT symmetry

KLOE

Collaboration

•

F. Ambrosino

Jul, 2006

16 pages

Published in:

Phys.Lett.B 642 (2006) 315-321

e-Print:

hep-ex/0607027 [hep-ex]

DOI:

10.1016/j.physletb.2006.09.046

Experiments:

FRASCATI-DAFNE-KLOE

View in:

ADS Abstract Service

reference search125 citations

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Abstract: (Elsevier)

We present the first observation of quantum interference in the process ϕ→KSKL→π+π−π+π− , using the KLOE detector at the Frascati e+e− collider DAΦNE. From about 5×104 neutral kaon pairs both decaying to π+π− pairs we obtain the distribution of Δ t , the difference between the two kaon decay times, which allows testing the validity of quantum mechanics and CPT invariance: no violation of either is observed. New or improved limits on coherence loss and CPT violation are presented.

Note:

submitted to Physics Letter B one number changed old:gamma=(1.1+2.9-2.4)10^-21 GeV new:(1.3+2.8-2.4)10^-21GeV corrected typos

electron positron: colliding beams
electron positron: annihilation
Phi(1020): electroproduction
Phi(1020): hadronic decay
K0: pair production
K0(L): hadronic decay
K0(S): hadronic decay
pi: pair production
interference
time: difference

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