The Lund b-jet plane

Le résumé fourni par la source

A bstract We compute the primary Lund plane density for jets initiated by a massive ( b ) quark to single logarithmic accuracy in Quantum Chromodynamics (QCD). In order to capture mass effects, we consider quasi-collinear factorisation and we include contributions from the running of the QCD coupling and from collinear evolution, in a variable flavour-number scheme. Furthermore, the resummation of soft logarithms, including clustering effects, is performed numerically, keeping the full dependence on the b -quark mass. While our all-order results can be applied to both hadron and lepton colliders, we present, as first phenomenological application, the resummed calculation of the Lund plane density in e + e − collisions at $$ \sqrt{s} $$ s = M Z , matched to tree-level matrix elements.

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