scholarly journals Power corrections in deep inelastic event shape variables

1997 ◽  
Author(s):  
Mrinal Dasgupta
Keyword(s):  
Event Shape ◽  
Power Corrections ◽  
Inelastic Event

scholarly journals Second-order QCD corrections to event shape distributions in deep inelastic scattering

2019 ◽  
Vol 79 (12) ◽  
Author(s):  
T. Gehrmann ◽  
A. Huss ◽  
J. Mo ◽  
J. Niehues
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Second Order ◽  
Event Shape ◽  
Leading Order ◽  
Nucleon Scattering ◽  
Mean Values ◽  
Scale Uncertainty ◽  
Power Corrections ◽  
Dispersive Model

AbstractWe compute the next-to-next-to-leading order (NNLO) QCD corrections to event shape distributions and their mean values in deep inelastic lepton–nucleon scattering. The magnitude and shape of the corrections varies considerably between different variables. The corrections reduce the renormalization and factorization scale uncertainty of the predictions. Using a dispersive model to describe non-perturbative power corrections, we compare the NNLO QCD predictions with data from the H1 and ZEUS experiments. The newly derived corrections improve the theory description of the distributions and of their mean values.

scholarly journals Power corrections to event shape distributions

1997 ◽  
Vol 404 (3-4) ◽  
pp. 321-327 ◽  
Author(s):  
Yu.L. Dokshitzer ◽  
B.R. Webber
Keyword(s):  
Event Shape ◽  
Power Corrections

scholarly journals On power corrections to the event shape distributions in QCD

2000 ◽  
Vol 2000 (10) ◽  
pp. 010-010 ◽  
Author(s):  
Gregory P Korchemsky ◽  
Sofiane Tafat
Keyword(s):  
Event Shape ◽  
Power Corrections

scholarly journals Soft-drop grooming for hadronic event shapes

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Jeremy Baron ◽  
Daniel Reichelt ◽  
Steffen Schumann ◽  
Niklas Schwanemann ◽  
Vincent Theeuwes
Keyword(s):  
Event Generator ◽  
Experimental Measurements ◽  
Event Shape ◽  
Matrix Elements ◽  
Underlying Event ◽  
Hadronic Event ◽  
Wide Range ◽  
Event Shapes ◽  
The Impact ◽  
Perturbative Corrections

Abstract 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.

scholarly journals From correlation functions to event shapes in QCD

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
D. Chicherin ◽  
J. M. Henn ◽  
E. Sokatchev ◽  
K. Yan
Keyword(s):  
Correlation Function ◽  
Correlation Functions ◽  
Event Shape ◽  
Proof Of Concept ◽  
Yang Mills ◽  
Point Correlation ◽  
Point Correlation Function ◽  
Event Shapes ◽  
A Charge ◽  
Conserved Currents

Abstract We present a method for calculating event shapes in QCD based on correlation functions of conserved currents. The method has been previously applied to the maximally supersymmetric Yang-Mills theory, but we demonstrate that supersymmetry is not essential. As a proof of concept, we consider the simplest example of a charge-charge correlation at one loop (leading order). We compute the correlation function of four electromagnetic currents and explain in detail the steps needed to extract the event shape from it. The result is compared to the standard amplitude calculation. The explicit four-point correlation function may also be of interest for the CFT community.

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