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A TEST OF CHIRAL PERTURBATION-THEORY FROM THE MEASUREMENT OF THE DECAY KS-]GAMMA-GAMMA

Abstract:

Data from NA31 experiment at CERN have been used to measure the decay KS → γγ. From 69 candidate events of the type K0 → γγ, 52 events can be attributed to KL → γγ and one event is expected from background processes. The ratio of the relative decay widths R = Γ(KS → γγ) Γ(KL → γγ) is measured to be R = 2.2 ± 1.0(stat.) ± 0.3(syst.) ± 0.2(ext.) where the external systematic error is due to the experimental uncertainty in the branching ratio of the decay KL → γγ. This translates into a branchin...

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Publication status:
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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Particle Physics
BUCHHOLZ, P More by this author
GATIGNON, L More by this author
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Journal:
PHYSICS LETTERS B
Volume:
351
Issue:
4
Pages:
579-584
Publication date:
1995-06-01
DOI:
ISSN:
0370-2693
URN:
uuid:0c526fac-1c12-425f-864c-570dfdd06bcf
Source identifiers:
7999
Local pid:
pubs:7999

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