Using data taken during the year 2000 with the NA48 detector at the CERN SPS, a search for the CP violating decay KS → 3π0 has been performed. From a fit to the lifetime distribution of about 4.9 million reconstructed K0/antiK0 → 3π0 decays, the CP violating amplitude η000 = A(KS → 3π0)/A(KL → 3π0) has been found to be Re(η000 ) = −0.002 ± 0.011 ± 0.015 and Im(η000 ) = −0.003 ± 0.013 ± 0.017. This corresponds to an upper limit on the branching fraction of Br(KS → 3π0) < 7.4 × 10^−7 at 90% confidence level. The result is used to improve knowledge of Re(epsilon) and the CPT violating quantity Im(δ) via the Bell–Steinberger relation.
Search for CP violation in K0 -> 3pi0 decays / A., L., D., M., J. R., B., R. S., D., T. J., G., G. E., K., C., L., D. J., M., E., O., M. A., P., T. O., W., S. A., W., R., A., G., B., G., B., A., C., T., C.D., D., C., N., D., V., F., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 610:3-4(2005), pp. 165-176. [10.1016/j.physletb.2005.01.065]
Search for CP violation in K0 -> 3pi0 decays
BIZZETI, Andrea;
2005
Abstract
Using data taken during the year 2000 with the NA48 detector at the CERN SPS, a search for the CP violating decay KS → 3π0 has been performed. From a fit to the lifetime distribution of about 4.9 million reconstructed K0/antiK0 → 3π0 decays, the CP violating amplitude η000 = A(KS → 3π0)/A(KL → 3π0) has been found to be Re(η000 ) = −0.002 ± 0.011 ± 0.015 and Im(η000 ) = −0.003 ± 0.013 ± 0.017. This corresponds to an upper limit on the branching fraction of Br(KS → 3π0) < 7.4 × 10^−7 at 90% confidence level. The result is used to improve knowledge of Re(epsilon) and the CPT violating quantity Im(δ) via the Bell–Steinberger relation.| File | Dimensione | Formato | |
|---|---|---|---|
|
0408053.pdf
Open access
Tipologia:
VOR - Versione pubblicata dall'editore
Dimensione
239.81 kB
Formato
Adobe PDF
|
239.81 kB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate

I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris




