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Determination of the e(+)e(-)->gamma gamma(gamma) cross-section at centre-of-mass energies ranging from 189 GeV to 202 GeV

Abstract:

A test of the QED process e+e- → γγ(γ) is reported. The data analysed were collected with the DELPHI detector in 1998 and 1999 at the highest energies achieved at LEP, reaching 202 GeV in the centre-of-mass. The total integrated luminosity amounts to 375.7 pb-1. The differential and total cross-sections for the process e+e- → γγ were measured, and found to be in agreement with the QED prediction. 95% confidence level (C.L.) lower limits on the QED cut-off parameters of Λ+ > 330 GeV and λ- ...

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Publication status:
Published

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Journal:
PHYSICS LETTERS B
Volume:
491
Issue:
1-2
Pages:
67-80
Publication date:
2000-10-12
DOI:
ISSN:
0370-2693
URN:
uuid:82800001-6f55-4648-ba99-3ef3085cec01
Source identifiers:
28368
Local pid:
pubs:28368
Language:
English

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