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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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Automation of One-Loop Calculations with GoSam: Present Status and Future Outlook
/ Cullen, Gavin (Edinburgh U.) ; Greiner, Nicolas (Illinois U., Urbana ; Munich, Max Planck Inst.) ; Heinrich, Gudrun (Munich, Max Planck Inst.) ; Luisoni, Gionata (Durham U.) ; Mastrolia, Pierpaolo (Munich, Max Planck Inst.) ; Ossola, Giovanni (New York City Coll. Tech. ; CUNY, Graduate School - U. Ctr.) ; Reiter, Thomas (Munich, Max Planck Inst.) ; Tramontano, Francesco (CERN)
In this presentation, we describe the GoSam (Golem/Samurai) framework for the automated computation of multi-particle scattering amplitudes at the one-loop level. The amplitudes are generated analytically in terms of Feynman diagrams, and can be evaluated using either D-dimensional integrand reduction or tensor decomposition. [...]
arXiv:1111.3339.-
2011 - 15 p.
Fulltext: arXiv:1111.3339 - PDF; v42p2351 - PDF; External link: Acta Physica Polonica Server
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Automated One-Loop Calculations with GoSam
/ Cullen, Gavin (DESY, Zeuthen ; Edinburgh U.) ; Greiner, Nicolas (Illinois U., Urbana ; Munich, Max Planck Inst.) ; Heinrich, Gudrun (Munich, Max Planck Inst.) ; Luisoni, Gionata (Durham U., IPPP) ; Mastrolia, Pierpaolo (Padua U. ; INFM, Padua) ; Ossola, Giovanni (New York City Coll. Tech. ; CUNY, Graduate School - U. Ctr.) ; Reiter, Thomas (Munich, Max Planck Inst.) ; Tramontano, Francesco (CERN)
We present the program package GoSam which is designed for the automated calculation of one-loop amplitudes for multi-particle processes in renormalisable quantum field theories. The amplitudes, which are generated in terms of Feynman diagrams, can be reduced using either D-dimensional integrand-level decomposition or tensor reduction. [...]
arXiv:1111.2034; CERN-PH-TH-2011-272; MPP-2011-132; DESY-11-203; IPPP-11-72; DCPT-11-144; EDINBURGH-2011-32; CERN-PH-TH-2011-272; MPP-2011-132; DESY-11-203; IPPP-11-72; DCPT-11-144; EDINBURGH-2011-32.-
2012-03-27 - 65 p.
- Published in : Eur. Phys. J. C 72 (2012) 1889
Fulltext: PDF; External link: Preprint
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Modern Feynman Diagrammatic One-Loop Calculations
/ Reiter, Thomas (NIKHEF, Amsterdam) ; Cullen, Gavin (Edinburgh U.) ; Greiner, Nicolas (Illinois U., Urbana) ; Guffanti, Alberto (Freiburg U.) ; Guillet, Jean-Philippe (Annecy, LAPTH) ; Heinrich, Gudrun (Durham U., IPPP) ; Karg, Stefan (Aachen, Tech. Hochsch.) ; Kauer, Nikolas (Royal Holloway, U. of London) ; Kleinschmidt, Tobias (Durham U., IPPP) ; Koch-Janusz, Maciej (NIKHEF, Amsterdam) et al.
In this talk we present techniques for calculating one-loop amplitudes for multi-leg processes using Feynman diagrammatic methods in a semi-algebraic context. Our approach combines the advantages of the different methods allowing for a fast evaluation of the amplitude while monitoring the numerical stability of the calculation. [...]
arXiv:1011.6632.-
2010 - 11 p.
- Published in : PoS: CPP2010 (2010) , pp. 003
Fulltext: arXiv:1011.6632 - PDF; 1011.6632 - PDF; CPP2010_003 - PDF; External link: Proceedings of Science Server
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Unitarity-Cuts, Stokes' Theorem and Berry's Phase
/ Mastrolia, Pierpaolo (Enrico Fermi Ctr., Rome ; Salerno U. ; CERN)
Two-particle unitarity-cuts of scattering amplitudes can be efficiently computed by applying Stokes' Theorem, in the fashion of the Generalised Cauchy Theorem. Consequently, the Optical Theorem can be related to the Berry Phase, showing how the imaginary part of arbitrary one-loop Feynman amplitudes can be interpreted as the flux of a complex 2-form..
arXiv:1001.3156.-
2010 - 6 p.
- Published in : PoS: RADCOR2009 (2010) , pp. 021
Fulltext: PDF; Preprint: PDF; External link: POS
In : 9th International Symposium On Radiative Corrections : applications Of Quantum Field Theory To Phenomenology, Ascona, Switzerland, 25 Oct - 30 Oct 2009, pp.021
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Unitarity-Cuts and Berry's Phase
/ Mastrolia, Pierpaolo (CERN)
Elaborating on the observation that two-particle unitarity-cuts of scattering amplitudes can be computed by applying Stokes' Theorem, we relate the Optical Theorem to the Berry Phase, showing how the imaginary part of arbitrary one-loop Feynman amplitudes can be interpreted as the flux of a complex 2-form..
arXiv:0906.3789; CERN-PH-TH-2009-104; CERN-PH-TH-2009-104.-
Geneva : CERN, 2010 - 3 p.
- Published in : Lett. Math. Phys. 91 (2010) 199-204
Fulltext: arXiv:0906.3789 - PDF; 10.1007_s11005-010-0370-z - PDF; External link: Preprint
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Double-Cut of Scattering Amplitudes and Stokes' Theorem
/ Mastrolia, Pierpaolo (CERN)
We show how Stokes' Theorem, in the fashion of the Generalised Cauchy Formula, can be applied for computing double-cut integrals of one-loop amplitudes analytically. It implies the evaluation of phase-space integrals of rational functions in two complex-conjugated variables, which are simply computed by an indefinite integration in a single variable, followed by Cauchy's Residue integration in the conjugated one. [...]
arXiv:0905.2909; CERN-PH-TH-2009-061; CERN-PH-TH-2009-061.-
Geneva : CERN, 2009 - 7 p.
- Published in : Phys. Lett. B 678 (2009) 246-249
Fulltext: PDF; External link: Preprint
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