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arXiv · 1209.5914

Gluon- and Quark-Jet Multiplicities with NNNLO and NNLL Accuracy

P. Bolzoni·B. A. Kniehl·A. V. Kotikov
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Abstract

We present a new approach to consider and include both the perturbative and the non-perturbative contributions to the multiplicities of gluon and quark jets. Thanks to this new method, we have included for the first time new contributions to these quantities obtaining next-to-next-to-leading-logarithmic resummed formulas. Our analytic expressions depend on two non-perturbative parameters with a clear and simple physical interpretation. A global fit of these two quantities shows how our results solve a longstanding discrepancy in the theoretical description of the data.

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P. Bolzoni, B. A. Kniehl, A. V. Kotikov. 2013-01-14. Gluon- and Quark-Jet Multiplicities with NNNLO and NNLL Accuracy. https://doi.org/10.1103/physrevlett.109.242002

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