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• W3103114583 abstract "Jet grooming algorithms are widely used in experimental analyses at hadron colliders to remove contaminating radiation from within jets. While the algorithms perform a great service to the experiments, their intricate algorithmic structure and multiple parameters has frustrated precision theoretic understanding. In this paper, we demonstrate that one particular groomer called soft drop actually makes precision jet substructure easier. In particular, we derive a factorization formula for a large class of soft drop jet substructure observables, including jet mass. The essential observation that allows for this factorization is that, without the soft wide-angle radiation groomed by soft drop, all singular contributions are collinear. The simplicity and universality of the collinear limit in QCD allows us to show that to all orders, the normalized differential cross section has no contributions from non-global logarithms. It is also independent of process, up to the relative fraction of quark and gluon jets. In fact, soft drop allows us to define this fraction precisely. The factorization theorem also explains why soft drop observables are less sensitive to hadronization than their ungroomed counterparts. Using the factorization theorem, we resum the soft drop jet mass to next-to-next-to-leading logarithmic accuracy. This requires calculating some clustering effects that are closely related to corresponding effects found in jet veto calculations. We match our resummed calculation to fixed order results for both $e^+e^-to$ dijets and $ppto Z+j$ events, producing the first jet substructure predictions (groomed or ungroomed) to this accuracy for the LHC." @default.
• W3103114583 created "2020-11-23" @default.
• W3103114583 creator A5025519853 @default.
• W3103114583 creator A5031428417 @default.
• W3103114583 creator A5043305225 @default.
• W3103114583 creator A5072714716 @default.
• W3103114583 date "2016-07-01" @default.
• W3103114583 modified "2023-10-06" @default.
• W3103114583 title "Factorization for groomed jet substructure beyond the next-to-leading logarithm" @default.
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• W3103114583 doi "https://doi.org/10.1007/jhep07(2016)064" @default.
• W3103114583 hasPublicationYear "2016" @default.
• W3103114583 type Work @default.
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