Direct measurement of the W-γ coupling at the CERN pp Collider

CERN pp collider collaboration

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    Abstract

    The process pp→evγ+X is studied as √s=630 GeV. The observed signal is used to extract a direct measurement of the parameters κ and λ which define the magnetic dipole and electric quadrupole moments of the W boson and therefore the WWγ coupling. We find κ=1+2.6 -2.2 and λ=0+1.7 -1.8 and their 95% confidence limits -3.5<κ<5.9 and -3.6<λ<3.5. The results are model indepedent and in good agreement with the standard model values, κ=1 and λ=0.

    Original languageEnglish
    Pages (from-to)194-202
    Number of pages9
    JournalPhysics Letters B
    Volume277
    Issue number1-2
    DOIs
    Publication statusPublished - 27 Feb 1992

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