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A collinear shower algorithm for NSL non-singlet fragmentation
/ van Beekveld, Melissa (NIKHEF, Amsterdam) ; Dasgupta, Mrinal (Manchester U.) ; El-Menoufi, Basem Kamal (Monash U.) ; Helliwell, Jack (Oxford U., Theor. Phys.) ; Monni, Pier Francesco (CERN) ; Salam, Gavin P. (Oxford U., Theor. Phys. ; U. Oxford (main))
We formulate a collinear partonic shower algorithm that achieves next-to-single-logarithmic (NSL, $\alpha_s^n L^{n-1}$) accuracy for collinear-sensitive non-singlet fragmentation observables. [...]
CERN-TH-2024-125 ; Nikhef 2024-013 ; OUTP-24-05P ; arXiv:2409.08316.
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36.
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A new standard for the logarithmic accuracy of parton showers
/ van Beekveld, Melissa (Nikhef, Amsterdam) ; Dasgupta, Mrinal (Manchester U.) ; El-Menoufi, Basem Kamal (Monash U.) ; Ferrario Ravasio, Silvia (CERN) ; Hamilton, Keith (University Coll. London) ; Helliwell, Jack (Oxford U., Theor. Phys.) ; Karlberg, Alexander (CERN) ; Monni, Pier Francesco (CERN) ; Salam, Gavin P. (Oxford U., Theor. Phys. ; U. Oxford (main)) ; Scyboz, Ludovic (Monash U.) et al.
We report on a major milestone in the construction of logarithmically accurate final-state parton showers, achieving next-to-next-to-leading-logarithmic (NNLL) accuracy for the wide class of observables known as event shapes. [...]
arXiv:2406.02661 ; CERN-TH-2024-057 ; OUTP-24-03P.
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19 p.
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Introduction to the PanScales framework, version 0.1
/ van Beekveld, Melissa (Nikhef, Amsterdam) ; Dasgupta, Mrinal (Manchester U.) ; El-Menoufi, Basem Kamal (Manchester U. ; Monash U.) ; Ravasio, Silvia Ferrario (CERN) ; Hamilton, Keith (U. Coll. London) ; Helliwell, Jack (Oxford U.) ; Karlberg, Alexander (CERN) ; Medves, Rok (Oxford U.) ; Monni, Pier Francesco (CERN) ; Salam, Gavin P. (Oxford U.) et al.
In this article, we document version 0.1 of the PanScales code for parton shower simulations. With the help of a few examples, we discuss basic usage of the code, including tests of logarithmic accuracy of parton showers. [...]
arXiv:2312.13275; CERN-TH-2023-238; Nikhef 2023-026; OUTP-23-16P.-
2024-06 - 25 p.
- Published in : 10.21468/SciPostPhysCodeb.31
Fulltext: Publication - PDF; 2312.13275 - PDF;
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Parton Showering with Higher Logarithmic Accuracy for Soft Emissions
/ Ferrario Ravasio, Silvia (CERN) ; Hamilton, Keith (University Coll. London) ; Karlberg, Alexander (CERN) ; Salam, Gavin P. (Oxford U., Theor. Phys. ; Oxford U.) ; Scyboz, Ludovic (Oxford U., Theor. Phys.) ; Soyez, Gregory (CERN ; IPhT, Saclay)
The accuracy of parton-shower simulations is often a limiting factor in the interpretation of data from high-energy colliders. We present the first formulation of parton showers with accuracy one order beyond state-of-the-art next-to-leading logarithms, for classes of observable that are dominantly sensitive to low-energy (soft) emissions, specifically non-global observables and subjet multiplicities. [...]
arXiv:2307.11142; CERN-TH-2023-127; OUTP-23-07P.-
2023-10-18 - 11 p.
- Published in : Phys. Rev. Lett. 131 (2023) 161906
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Matching and event-shape NNDL accuracy in parton showers
/ Hamilton, Keith (University Coll. London) ; Karlberg, Alexander (Oxford U., Theor. Phys. ; CERN) ; Salam, Gavin P. (Oxford U., Theor. Phys. ; Oxford U.) ; Scyboz, Ludovic (Oxford U., Theor. Phys.) ; Verheyen, Rob (University Coll. London)
To explore the interplay of NLO matching and next-to-leading logarithmic (NLL) parton showers, we consider the simplest case of $\gamma^*$ and Higgs-boson decays to $q\bar q$ and $gg$ respectively. Not only should shower NLL accuracy be retained across observables after matching, but for global event-shape observables and the two-jet rate, matching can augment the shower in such a way that it additionally achieves next-to-next-to-double-logarithmic (NNDL) accuracy, a first step on the route towards general NNLL. [...]
arXiv:2301.09645.-
2023-03-28 - 42 p.
Fulltext: 2301.09645 - PDF; Publication - PDF; Erratum - PDF;
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Event Generators for High-Energy Physics Experiments
/ Campbell, J.M. (Fermilab) ; Diefenthaler, M. (Jefferson Lab) ; Hobbs, T.J. (Fermilab ; IIT, Chicago) ; Höche, Stefan (Fermilab) ; Isaacson, Joshua (Fermilab) ; Kling, Felix (DESY) ; Mrenna, Stephen (Fermilab) ; Reuter, J. (DESY) ; Alioli, S. (Milan Bicocca U. ; INFN, Milan Bicocca) ; Andersen, J.R. (Durham U., IPPP) et al.
We provide an overview of the status of Monte-Carlo event generators for high-energy particle physics. Guided by the experimental needs and requirements, we highlight areas of active development, and opportunities for future improvements. [...]
arXiv:2203.11110; CP3-22-12; DESY-22-042; FERMILAB-PUB-22-116-SCD-T; IPPP/21/51,
JLAB-PHY-22-3576; KA-TP-04-2022; LA-UR-22-22126; LU-TP-22-12; MCNET-22-04,
OUTP-22-03P; P3H-22-024; PITT-PACC 2207; UCI-TR-2022-02.-
2024-05-24 - 225 p.
- Published in : 10.21468/SciPostPhys.16.5.130
Fulltext: jt - PDF; 2203.11110 - PDF; Fulltext from Publisher: PDF; External links: JLab Document Server; Fermilab Library Server; eConf
In : 2021 Snowmass Summer Study, Seattle, WA, United States, 11 - 20 July 2021, pp.
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Calculating the primary Lund Jet Plane density
/ Lifson, Andrew (Lund U., Dept. Theor. Phys.) ; Salam, Gavin P. (Oxford U., Theor. Phys. ; CERN ; Paris, LPTHE) ; Soyez, Gregory (IPhT, Saclay)
The Lund-jet plane has recently been proposed as a powerful jet substructure tool with a broad range of applications. In this paper, we provide an all-order single logarithmic calculation of the primary Lund-plane density in Quantum Chromodynamics, including contributions from the running of the coupling, collinear effects for the leading parton, and soft logarithms that account for large-angle and clustering effects. [...]
arXiv:2007.06578.-
2020-10-27 - 44 p.
- Published in : JHEP 2010 (2020) 170
Article from SCOAP3: PDF; Fulltext: PDF;
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Precise predictions for boosted Higgs production
/ Becker, Kathrin (Freiburg U.) ; Caola, Fabrizio (Oxford U., Theor. Phys.) ; Massironi, Andrea (CERN ; INFN, Milan Bicocca) ; Mistlberger, Bernhard (MIT) ; Monni, Pier Francesco (CERN) ; Chen, Xuan (Zurich U.) ; Frixione, Stefano (INFN, Genoa) ; Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U., IPPP) ; Hamilton, Keith (University Coll. London) et al.
Inclusive Higgs boson production at large transverse momentum is induced by different production channels. We focus on the leading production through gluon fusion, and perform a consistent combination of the state of the art calculations obtained in the infinite-top-mass effective theory at next-to-next-to-leading order (NNLO) and in the full Standard Model (SM) at next-to-leading order (NLO). [...]
arXiv:2005.07762; CERN-TH-2020-074.-
2024-01-04 - 17 p.
- Published in : SciPost Phys. Core 7 (2024) 001
Fulltext: 2005.07762 - PDF; document - PDF; Publication - PDF;
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