New Standard for the Logarithmic Accuracy of Parton Showers

被引：2

作者：

van Beekveld, Melissa ^{[1
]}

Dasgupta, Mrinal ^{[2
]}

El-Menoufi, Basem Kamal ^{[3
]}

Ravasio, Silvia Ferrario ^{[4
]}

Hamilton, Keith ^{[5
]}

Helliwell, Jack ^{[6
]}

Karlberg, Alexander ^{[4
]}

Monni, Pier Francesco ^{[4
]}

Salam, Gavin P. ^{[6
,7
]}

Scyboz, Ludovic ^{[3
]}

Soto-Ontoso, Alba ^{[4
]}

Soyez, Gregory ^{[8
]}

机构：

[1] Nikhef, Theory Grp, Sci Pk 105, NL-1098 XG Amsterdam, Netherlands

[2] Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, England

[3] Monash Univ, Sch Phys & Astron, Wellington Rd, Clayton, Vic 3800, Australia

[4] CERN, Theoret Phys Dept, CH-1211 Geneva 23, Switzerland

[5] UCL, Dept Phys & Astron, London WC1E 6BT, England

[6] Clarendon Lab, Rudolf Peierls Ctr Theoret Phys, Pk Rd, Oxford OX1 3PU, England

[7] All Souls Coll, Oxford OX1 4AL, England

[8] Univ Paris Saclay, IPhT, CNRS UMR 3681, CEA Saclay, F-91191 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW LETTERS | 2025年 / 134卷 / 01期

基金：

英国科学技术设施理事会; 欧洲研究理事会; 澳大利亚研究理事会;

关键词：

JET MASS; QCD;

D O I：

10.1103/PhysRevLett.134.011901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on a major milestone in the construction of logarithmically accurate final-state parton showers, achieving next-to-next-to-leading-logarithmic (NNLL) accuracy for the wide class of observables known as event shapes. The key to this advance lies in the identification of the relation between critical NNLL analytic resummation ingredients and their parton-shower counterparts. Our analytic discussion is supplemented with numerical tests of the logarithmic accuracy of three shower variants for more than a dozen distinct event-shape observables in Z-* qq <overline> and Higgs-* gg decays. The NNLL terms are phenomenologically sizeable, as illustrated in comparisons to data.

引用

页数：7

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