paper

Z/gamma* plus Multiple Hard Jets in High Energy Collisions

arXiv:1603.05460 · doi:10.1007/JHEP05(2016)136

Abstract

We present a description of the production of a di-lepton pair (through Z boson and virtual photon) in association with at least two jets. This calculation adds to the fixed-order accuracy the dominant logarithms in the limit of large partonic centre-of-mass energy to all orders in the strong coupling. This is achieved within the framework of High Energy Jets. This calculation is made possible by extending the high energy treatment to take into account the multiple t-channel exchanges arising from Z and gamma*-emissions off several quark lines. The correct description of the interference effects from the various t-channel exchanges requires an extension of the subtraction terms in the all-order calculation. We describe this construction and compare the resulting predictions to a number of recent analyses of LHC data. The description of a wide range of observables is good, and, as expected, stands out from other approaches in particular in the regions of large dijet invariant mass and large dijet rapidity spans.

arXiv comment35 pages, 14 figures; v2: additional appendix discussing scale variation in normalised distributions plus additional comments on scale variation in section 4, matches published version

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