PSR21 - Parton Showers and Resummation

25 May 2021, 13:45 → 27 May 2021, 19:05 Europe/Zurich

 

 

 

 

 

 

 

Note, due to the ongoing COVID-19 situation the PSR21 conference will be organised as an online meeting. We hope to have a face-to-face workshop in 2022 again.

 

The 2021 annual workshop on Parton Showers and Resummation will be held online, during May 25-27, 2021. It is organised jointly by the Institute for Theoretical Physics, University of Göttingen, and the IPPP Durham. The workshop brings together researchers interested in Monte Carlo generators and in particular parton showers, resummation techniques and QCD phenomenology, to present and discuss the latest developments and applications.

The workshop is free of registration fees. All talks will be given via zoom, the link to the meeting is:

https://uni-goettingen.zoom.us/j/94256085967?pwd=SGNialkzY1lMeU0veHk1R0NBcnYrZz09

When asked for the passcode, enter: 548446

 

 

 

 

Tuesday 25 May

13:45 → 14:00 Welcome note

14:00 → 15:30 Talks: MC & Resummation overviews

14:00 MC generator overview

Speakers: Stefan Prestel (Fermi National Accelerator Laboratory), Stefan Prestel, Stefan Prestel, Stefan Prestel (Fermi National Accelerator Laboratory), Stefan Prestel

talk20210525.pdf

14:45 Resummation overview

Speaker: Dr Andrea Banfi (University of Sussex)

banfi_PSR21.pdf

banfi_PSR21.pdf

banfi_PSR21.pptx

15:30 → 15:45 Break

15:45 → 16:45 Talks: Jet Substructure

15:45 Jet Substructure overview

Speaker: Andrew Larkoski (Reed Collge)

PSR2021_Larkoski.pdf

16:15 Groomed jet mass as a direct probe of collinear parton dynamics

Speaker: Basem El-Menoufi (The university of Manchester)

El-Menoufi_PSR21.pdf

16:30 Dynamical grooming

Speaker: Alba Soto Ontoso (IPhT)

psr_aso.pdf

16:45 → 17:00 Break

17:00 → 18:35 Talks: Resummation

17:00 Semi-analytic resummation in the Sherpa framework

Speaker: Daniel Reichelt

PSR2021_DReichelt.pdf

17:15 Next-to-leading non-global logarithms in QCD

Speaker: Pier Francesco Monni (CERN)

NGLs.pdf

17:30 Non-global Logarithms Beyond Leading Colour

Speaker: Chang Wu (Università di Genova & INFN Genova)

PSR21-Chang.pdf

17:45 Interplay between perturbative and non-perturbative effects with the ARES method

Speaker: Ryan Wood (University of Sussex)

PSR 2021 - Ryan Wood.pdf

Wednesday 26 May

14:00 → 15:25 Talks: Parton Showers

14:00 Electroweak corrections and multijet merging

Speaker: Enrico Bothmann (University of Göttingen)

PSR2021_Enrico_Bothmann.pdf

14:20 The PanScale shower approach

Speaker: Pier Francesco Monni (CERN)

PSR_2021.pdf

14:40 Boosted Higgs Production in Vector Boson Fusion

Speaker: Silvia Ferrario Ravasio (University of Oxford)

PSR21_ferrario.pdf

14:55 Parton-Shower Effects in Higgs Production via Vector-Boson Fusion

Speaker: Johannes Scheller (Eberhard Karls Universität Tübingen)

Talk_PSR_Scheller.pdf

15:10 Spin correlations in the PanScales parton showers and jet observables

Speaker: Rob Verheyen

PSR_Spin.pdf

15:25 → 15:40 Break

15:40 → 16:55 Talks: Parton shower accuracy

15:40 Sector showers with fixed-order corrections

Speaker: Christian Preuss (Monash University)

psr_ctp.pdf

16:00 Subleading colour effects in the PanScales parton showers and beyond

It is known that standard dipole showers yield incorrect subleading-colour contributions already at leading-logarithmic level for certain observables. In this talk, I will present two new, simple prescriptions to palliate this issue. I will show how the resulting colour-corrected matrix elements are cured at fixed order in the appropriate limits. I will then demonstrate how the two algorithms allow us to achieve full-colour next-to-leading logarithmic accuracy for various observables (global observables and multiplicities). I will conclude by commenting on the comparison to full-colour NLL-resummed results for non-global observables.

Speaker: Ludovic Scyboz (University of Oxford)

LudovicScyboz_PSR2021_colour.pdf

16:15 Improved dipole showers

Speaker: Simon Platzer (University of Vienna (AT))

16:35 Subleading effect in parton showers

Speaker: Davison Soper (University of Oregon)

PSR21.pdf

PSR21.pdf

16:55 → 17:10 Break

17:10 → 18:30 Discussion PS accuracy

Thursday 27 May

14:00 → 15:30 Talks: Higher orders and resummation

14:00 The Geneva framework

Speaker: Matthew Lim (Universita' di Milano-Bicocca)

PSR21_Lim_Geneva.pdf

14:20 qT subtraction/resummation at N3LO/N3LL

Speaker: Leandro Cieri (INFN)

PSR21_Leandro_Cieri.pdf

14:40 Transverse momentum resummation on the azimuthal spectra of the final leptons in the Drell-Yan processes

Speaker: Wanli Ju (Durham University)

WanliJu_PSR2021.pdf

14:55 Fiducial Higgs and Drell-Yan distributions at N3LL'+NNLO with RadISH

Speaker: Dr Luca Rottoli (Universitaet Zuerich (CH))

rottoli_talk_PSR_2021.pdf

15:10 Azimuthal decorrelation in V+jet production with the WTA axis

Speaker: Rudi Rahn (Universiteit van Amsterdam)

PSR_Rahn.pdf

15:25 y23 at NLL with PanScales

Speaker: Gregory Soyez (IPhT, CEA Saclay)

y23-nll-panscales.pdf

15:30 → 15:40 Break

15:40 → 16:45 Talks: TMDs and resummation

15:40 kT factorisation and TMDs

Speaker: Andreas van Hameren (IFJ PAN)

vanHameren.pdf

16:00 The parton branching method for TMDs in Monte Carlo calculations

Speaker: Mees van Kampen (University of Antwerp)

PSR21_vanKampen.pdf

16:15 Quenching effects in the jet spectrum at various cone sizes

Speaker: Adam Takacs (University of Bergen)

Adam_Takacs_PSR_2021.pdf

16:30 Automating the calculation of jet and beam functions

Speaker: Goutam Das (University of Siegen)

Das_PSR21.pdf

16:45 → 16:55 Break

16:55 → 17:55 Talks: Resummation

16:55 Evolution of Track functions at order alpha_s^2

Speaker: Solange Schrijnder van Velzen

17:10 Next-to-leading power two-loop soft functions for the Drell-Yan process at threshold

Speaker: Mr Sebastian Jaskiewicz (Technical University of Munich)

psr21_jaskiewicz.pdf

17:25 NLP resummation and the endpoint divergent contribution in DIS

Speaker: Leonardo Vernazza (INFN, Torino)

PSR-2021.pdf

17:40 The role of NLP threshold corrections in dQCD and SCET

Speaker: Melissa van Beekveld

psr_mei2021_beekveld.pdf