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First observation of the KS → π0γ γ decay

Abstract:
Using the NA48 detector at the CERN SPS, 31 KS → π 0γγ candidates with an estimated background of 13.7 ± 3.2 events have been observed. This first observation leads to a branching ratio of BR(KS → π0γγ) z>0.2 = (4.9 ± 1.6stat ± 0.9 syst) × 10-8 in agreement with Chiral Perturbation Theory predictions. © 2003 Elsevier B.V. All rights reserved.

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Authors


Batley, JR More by this author
Dosanjh, RS More by this author
Gershon, TJ More by this author
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Journal:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume:
578
Issue:
3-4
Pages:
276-284
Publication date:
2004-01-08
DOI:
ISSN:
0370-2693
URN:
uuid:80fe18cb-d710-490e-bf1b-afa0394f9b18
Source identifiers:
163004
Local pid:
pubs:163004
Language:
English

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