Next-to-leading power threshold corrections for finite order and resummed colour-singlet cross sections

A bstract We study next-to-leading-power (NLP) threshold corrections in colour-singlet production processes, with particular emphasis on Drell-Yan (DY) and single-Higgs production. We assess the quality of the partonic and hadronic threshold expansions for each process up to NNLO. We determine numer...

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Vydané v:The journal of high energy physics Ročník 2021; číslo 5; s. 1 - 59
Hlavní autori: van Beekveld, Melissa, Laenen, Eric, Damsté, Jort Sinninghe, Vernazza, Leonardo
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2021
Springer Nature B.V
SpringerOpen
Predmet:
Classical and Quantum Gravitation
Color
Cross-sections
Elementary Particles
High energy physics
Logarithms
Perturbative QCD
Physics
Physics and Astronomy
Quality assessment
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Quarks
Regular Article - Theoretical Physics
Relativity Theory
Resummation
String Theory
Resummation
Perturbative QCD
ISSN:1029-8479, 1029-8479
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Shrnutí:A bstract We study next-to-leading-power (NLP) threshold corrections in colour-singlet production processes, with particular emphasis on Drell-Yan (DY) and single-Higgs production. We assess the quality of the partonic and hadronic threshold expansions for each process up to NNLO. We determine numerically the NLP leading-logarithmic (LL) resummed contribution in addition to the leading-power next-to-next-to-leading logarithmic (LP NNLL) resummed DY and Higgs cross sections, matched to NNLO. We find that the inclusion of NLP logarithms is numerically more relevant than increasing the precision to N 3 LL at LP for these processes. We also perform an analytical and numerical comparison of LP NNLL + NLP LL resummation in soft-collinear effective theory and direct QCD, where we achieve excellent analytical and numerical agreement once the NLP LL terms are included in both formalisms. Our results underline the phenomenological importance of understanding the NLP structure of QCD cross sections.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP05(2021)114