Four-loop cusp anomalous dimension in QED
Sign Up to like & getrecommendations! Published in 2018 at "Journal of High Energy Physics"
DOI: 10.1007/jhep06(2018)073
Abstract: A bstractThe 4-loop CF3TFnl and 5-loop CF4TFnl terms in the HQET field anomalous dimension γh are calculated analytically (the 4-loop one agrees with the recent numerical result [1]). The 4-loop CF3TFnl and 5-loop CF4TFnl terms… read more here.
Keywords: four loop; anomalous dimension; cusp anomalous; dimension qed ... See more keywords
The structure of IR divergences in celestial gluon amplitudes
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep06(2021)171
Abstract: Abstract The all-loop resummation of SU(N) gauge theory amplitudes is known to factorize into an IR-divergent (soft and collinear) factor and a finite (hard) piece. The divergent factor is universal, whereas the hard function is… read more here.
Keywords: structure divergences; factor; anomalous dimension; gluon ... See more keywords
On the Casimir scaling violation in the cusp anomalous dimension at small angle
Sign Up to like & getrecommendations! Published in 2017 at "Journal of High Energy Physics"
DOI: 10.1007/jhep10(2017)052
Abstract: A bstractWe compute the four-loop nf contribution proportional to the quartic Casimir of the QCD cusp anomalous dimension as an expansion for small cusp angle ϕ. This piece is gauge invariant, violates Casimir scaling, and… read more here.
Keywords: four loop; dimension; anomalous dimension; cusp anomalous ... See more keywords