Strong coupling, unification, and recent data

Paul Langacker, Nir Polonsky

Research output: Contribution to journalArticlepeer-review

142 Scopus citations

Abstract

The prediction of strong coupling assuming (supersymmetric) coupling constant unification is reexamined. We find, using the new electroweak data, s(MZ)0.1290.010. The implications of the large s value are discussed. The role played by the Z quark width is stressed. It is also emphasized that high-energy (but not low-energy) corrections could significantly diminish the prediction. However, unless higher-dimension operators are assumed to be suppressed, at present one cannot place strong constraints on the superheavy spectrum. Nonleading electroweak threshold corrections are also discussed.

Original languageEnglish (US)
Pages (from-to)3081-3086
Number of pages6
JournalPhysical Review D
Volume52
Issue number5
DOIs
StatePublished - 1995

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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