Resummed predictions for jet-resolution scales in multijet production in e+e− annihilation

Baberuxki, Nick; Preuss, Christian T; Reichelt, Daniel; Schumann, Steffen

doi:10.1007/jhep04(2020)112

Cited by 29 publications

(36 citation statements)

References 117 publications

(165 reference statements)

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“…[29]. We have a particle a with momentum 25) which splits into particles b and c, whose momenta are given by λ (1, b, c)] , (5.26) where λ is the Källén function defined in Eqn. 29) and…”

Section: Global Recoilmentioning

confidence: 99%

Logarithmic accuracy of angular-ordered parton showers

Bewick

Ravasio

Richardson

et al. 2020

J. High Energ. Phys.

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We study the logarithmic accuracy of angular-ordered parton showers by considering the singular limits of multiple emission matrix elements. This allows us to consider different choices for the evolution variable and propose a new choice which has both the correct logarithmic behaviour and improved performance away from the singular regions. In particular the description of e + e − event shapes in the non-logarithmic region is significantly improved.

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Section: Global Recoilmentioning

confidence: 99%

Logarithmic accuracy of angular-ordered parton showers

Bewick

Ravasio

Richardson

et al. 2020

J. High Energ. Phys.

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“…We will present the general formalism to do so, we focus on groomed transverse thrust for concrete results. In what follows we make use of the implementation of the CAESAR formalism in the SHERPA framework presented originally presented in [50] which we recently also applied to obtain resummed predictions for soft-drop thrust [32] and multijet resolution scales [63] in electronpositron collisions.…”

Section: Caesar In a Nutshellmentioning

confidence: 99%

“…see ref. [63], averaged over the final-state particles only, here n = 2. Per default we will assume p = 1.…”

Section: Matching To Nlo and Achieving Nll Accuracymentioning

confidence: 99%

Soft-drop grooming for hadronic event shapes

Baron

Reichelt

Schumann

et al. 2021

J. High Energ. Phys.

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Soft-drop grooming of hadron-collision final states has the potential to significantly reduce the impact of non-perturbative corrections, and in particular the underlying-event contribution. This eventually will enable a more direct comparison of accurate perturbative predictions with experimental measurements. In this study we consider soft-drop groomed dijet event shapes. We derive general results needed to perform the resummation of suitable event-shape variables to next-to-leading logarithmic (NLL) accuracy matched to exact next-to-leading order (NLO) QCD matrix elements. We compile predictions for the transverse-thrust shape accurate to NLO + NLL′ using the implementation of the Caesar formalism in the Sherpa event generator framework. We complement this by state-of-the-art parton- and hadron-level predictions based on NLO QCD matrix elements matched with parton showers. We explore the potential to mitigate non-perturbative corrections for particle-level and track-based measurements of transverse thrust by considering a wide range of soft-drop parameters. We find that soft-drop grooming indeed is very efficient in removing the underlying event. This motivates future experimental measurements to be compared to precise QCD predictions and employed to constrain non-perturbative models in Monte-Carlo simulations.

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“…A recent calculation is the one presented in [43], closely following the precise measurement prescription in [36] for the groomed and ungroomed angularities measured on the leading anti-k t jet in Z+jet production. It is based on the CAESAR formalism [5] for NLL resummation and uses the automated implementation [48,49] available within the SHERPA [50,51] framework. The extension to soft drop groomed observables was introduced in [17].…”

Section: Pos(lhcp2021)274mentioning

confidence: 99%

Recent progress in jet substructure calculations

Reichelt¹

2021

Proceedings of the Ninth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2021)

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The substructure of QCD jets is an active area of research in both theory and experiment. This talk summarises the progress in calculations of jet substructure observables and the development of techniques to address the theoretical challenges posed by them. As particular example, the analysis of radiation inside jets using the Lund plane is reviewed. Fixed order and resummed calculations including the effect of the soft drop grooming technique are discussed for the observable family of jet angularities.

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Resummed predictions for jet-resolution scales in multijet production in e+e− annihilation

Cited by 29 publications

References 117 publications

Logarithmic accuracy of angular-ordered parton showers

Logarithmic accuracy of angular-ordered parton showers

Soft-drop grooming for hadronic event shapes

Recent progress in jet substructure calculations

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