Asymptotic freedom beyond the leading order

A. J. Buras, E. G. Floratos, D. A. Ross, C. T. Sachrajda

Research output: Contribution to journalArticlepeer-review

94 Scopus citations


We make a quantitative analysis of the full g2 interaction corrections to the leading Q2 dependence of νW2 at x ≥ 0.4, as given by an asymptotically free gauge theory. It turns out that due to partial cancellations between various contributions the g2 corrections are small. The best fit with the SLAC ep data after including the g2 corrections is almost identical to that without these corrections, the only effect being a change in Λ, the one free parameter, which sets the scale of the theory. On the other hand the effect of including target mass corrections is to improve the agreement of the prediction for νW2ep with data for large values of x. We study the implications of g2 and target mass corrections for R = σLL and conclude, in agreement with other authors, that although both types of corrections are vital they do not account for values of R for x ≥ 0.5 as measured at SLAC.

Original languageEnglish
Pages (from-to)308-326
Number of pages19
JournalNuclear Physics, Section B
Issue number2-3
StatePublished - 1977
Externally publishedYes


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