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On QCD resummation with kt clustering
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We revisit the impact of the jet algorithm on predictions of energy flow into gaps between hard jets, defined using the kt clustering procedure. The resulting prediction has two distinct components: a primary emission piece that is related to independent emission of soft gluons by the hard jets and a correlated emission (non-global) piece known only in the large N_c limit. We analytically compute the dependence of the primary emission term on the jet algorithm, which gives significantly more insight than our previous numerical study of the same. We also point out that the non-global component of the answer is reduced even more significantly by the clustering than suggested previously in the literature. Lastly we provide improved predictions for the latest ZEUS photoproduction data, assessing the impact of our latest findings.
Forward citations
Cited by 3 Pith papers
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Event isotropy in perturbative QCD
First pQCD predictions for event isotropy distributions at LO, NLO, and NLL+NLO accuracy in e+e- collisions.
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$V/H$+Jet Production with the Cambridge/Aachen Algorithm
C/A clustering reduces non-global and clustering logarithms relative to k_t at three loops and behaves comparably to k_t at all orders in V/H+jet jet-mass predictions.
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Clustering logarithms up to six loops
The five- and six-loop clustering logarithm coefficients for the kt jet algorithm are computed for the first time, and they are small enough to leave the four-loop result unchanged.
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