Abstract
There has recently been much interest in analytical computations of jet mass distributions with and without vetos on additional jet activity [1–6]. An important issue affecting such calculations, particularly at next-to-leading logarithmic (NLL) accuracy, is that of non-global logarithms as well as logarithms induced by jet definition, as we pointed out in an earlier work [3]. In this paper, we extend our previous calculations by independently deriving the full jet-radius analytical form of non-global logarithms, in the anti-k t jet algorithm. Employing the small-jet radius approximation, we also compute, at fixed-order, the effect of jet clustering on both \( C_F^2 \) and C F C A colour channels. Our findings for the C F C A channel confirm earlier analytical calculations of non-global logarithms in soft-collinear effective theory [5]. Moreover, all of our results, as well as those of [3], are compared to the output of the numerical program EVENT2. We find good agreement between analytical and numerical results both with and without final state clustering.
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ArXiv ePrint: 1111.2016
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Khelifa-Kerfa, K. Non-global logs and clustering impact on jet mass with a jet veto distribution. J. High Energ. Phys. 2012, 72 (2012). https://doi.org/10.1007/JHEP02(2012)072
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DOI: https://doi.org/10.1007/JHEP02(2012)072