Number of neutrinos from W,Z hadroproduction: Last count

F. Halzen, C. S. Kim, S. Willenbrock

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


We determine the number of light neutrinos directly from data on (i) the production of W and Z bosons in pp collisions and (ii) deep-inelastic scattering of leptons on hydrogen and deuterium. Ambiguities related to the use of structure functions are avoided. We conclude that at 95% confidence level, N3 and m(top)60 GeV. N=4 is allowed if the fourth neutrino is accompanied by a heavy charged lepton lighter than MW.. AE

Original languageEnglish
Pages (from-to)229-232
Number of pages4
JournalPhysical Review D
Issue number1
Publication statusPublished - 1988

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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