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The SAGEX review on scattering amplitudes
/ Travaglini, Gabriele (Queen Mary, U. of London) ; Brandhuber, Andreas (Queen Mary, U. of London) ; Dorey, Patrick (Durham U.) ; McLoughlin, Tristan (Trinity Coll., Dublin ; Humboldt U., Berlin) ; Abreu, Samuel (CERN ; Edinburgh U., Inst. Astron.) ; Bern, Zvi (UCLA) ; Bjerrum-Bohr, N. Emil J. (Bohr Inst.) ; Blümlein, Johannes (DESY, Zeuthen) ; Britto, Ruth (Trinity Coll., Dublin) ; Carrasco, John Joseph M. (Northwestern U. ; IPhT, Saclay) et al.
This is an introduction to, and invitation to read, a series of review articles on scattering amplitudes in gauge theory, gravity, and superstring theory. Our aim is to provide an overview of the field, from basic aspects to a selection of current (2022) research and developments..
arXiv:2203.13011; SAGEX-22-01.-
2022-11-30 - 15 p.
- Published in : J. Phys. A 55 (2022) 443001
Fulltext: document - PDF; 2203.13011 - PDF;
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Cross-Order Integral Relations from Maximal Cuts
/ Johansson, Henrik (CERN ; Nordita ; Stockholm U. ; Uppsala U.) ; Kosower, David A. (Caltech ; IPhT, Saclay) ; Larsen, Kasper J. (NIKHEF, Amsterdam ; Zurich, ETH) ; Søgaard, Mads (Bohr Inst.)
We study the ABDK relation using maximal cuts of one- and two-loop integrals with up to five external legs. We show how to find a special combination of integrals that allows the relation to exist, and how to reconstruct the terms with one-loop integrals squared. [...]
CERN-PH-TH-2014-262; NORDITA-2014-141; UUITP-20-14; CALT-TH-2015-014; SACLAY-IPHT-T14-239; NIKHEF-2014-051; arXiv:1503.06711; CERN-PH-TH-2014-262; NORDITA-2014-141; UUITP-20-14; CALT-TH-2015-014; SACLAY-IPHT-T14-239; NIKHEF-2014-051.-
2015-07-10 - 32 p.
- Published in : Phys. Rev. D 92 (2015) 025015
APS Open Access article: PDF; Preprint: PDF; External link: Preprint
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Ntuples for NLO Events at Hadron Colliders
/ Bern, Z. (UCLA) ; Dixon, L.J. (SLAC) ; Febres Cordero, F. (Simon Bolivar U.) ; Höche, S. (SLAC) ; Ita, H. (Freiburg U.) ; Kosower, D.A. (IPhT, Saclay) ; Maitre, D. (CERN ; Durham U.)
We present an event-file format for the dissemination of next-to-leading-order (NLO) predictions for QCD processes at hadron colliders. The files contain all information required to compute generic jet-based infrared-safe observables at fixed order (without showering or hadronization), and to recompute observables with different factorization and renormalization scales. [...]
UCLA-13-TEP-108; SLAC-PUB-15739; SB-F-422-13; IPHT-T13-228; IPPP-13-86; CERN-PH-TH-2013-243; arXiv:1310.7439; UCLA-13-TEP-108; SLAC-PUB-15739; SB-F-422-13; IPHT-T13-228; IPPP-13-86; CERN-PH-TH-2013-243.-
2014-05 - 18 p.
- Published in : Comput. Phys. Commun. 185 (2014) 1443-1460
Preprint: PDF; External link: SLAC
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The Vincia Parton Shower
/ Giele, Walter T. (Fermilab) ; Hartgring, Lisa (NIKHEF, Amsterdam) ; Kosower, David A. (CEA, DSM, Saclay) ; Laenen, Eric (NIKHEF, Amsterdam ; Amsterdam U. ; Utrecht U.) ; Larkoski, Andrew J. (MIT, Cambridge, CTP) ; Lopez-Villarejo, Juan J. (CEA, DSM, Saclay ; CERN ; Madrid, Autonoma U.) ; Ritzmann, Mathias (CEA, DSM, Saclay) ; Skands, Peter (CERN)
We summarize recent developments in the VINCIA parton shower. After a brief review of the basics of the formalism, the extension of VINCIA to hadron collisions is sketched. [...]
FERMILAB-CONF-13-658-T; arXiv:1307.1060.-
2013 - 6 p.
- Published in : PoS DIS2013 (2013) 165
Fulltext: fermilab-conf-13-658-t - PDF; DIS 2013_165 - PDF; Preprint: PDF; External links: POS; FERMILABCONF
In : 21st International Workshop on Deep-Inelastic Scattering and Related Subjects, Marseilles, Provence, France, 22 - 26 Apr 2013, pp.165
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An Overview of Maximal Unitarity at Two Loops
/ Johansson, Henrik (CERN) ; Kosower, David A. (Saclay, SPhT) ; Larsen, Kasper J. (NIKHEF, Amsterdam)
We discuss the extension of the maximal-unitarity method to two loops, focusing on the example of the planar double box. Maximal cuts are reinterpreted as contour integrals, with the choice of contour fixed by the requirement that integrals of total derivatives vanish on it. [...]
arXiv:1212.2132.-
2012 - 7 p.
- Published in : PoS: LL2012 (2012) , pp. 066
Fulltext: arXiv:1212.2132 - PDF; LL2012_066 - PDF; External links: POS; POS
In : 11th DESY Workshop on Elementary Particle Physics: Loops and Legs in Quantum Field Theory, Wernigerode, Germany, 15 - 20 Apr 2012, pp.066
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Three-Prong Distribution of Massive Narrow QCD Jets
/ Field, Matan (Harish-Chandra Res. Inst.) ; Gur-Ari, Guy (Weizmann Inst.) ; Kosower, David A. (IPhT, Saclay) ; Mannelli, Lorenzo (Weizmann Inst.) ; Perez, Gilad (Weizmann Inst. ; CERN)
We study the planar-flow distributions of narrow, highly boosted, massive QCD jets. Using the factorization properties of QCD in the collinear limit, we compute the planar-flow jet function from the one-to-three splitting function at tree-level. [...]
arXiv:1212.2106; CERN-PH-TH-2012-318; CERN-PH-TH-2012-318.-
2013-05-13 - 22 p.
- Published in : Phys. Rev. D 87 (2013) 094013
APS Published version, local copy: PDF; External link: Preprint
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Antenna Showers with Hadronic Initial States
/ Ritzmann, M. (Saclay, SPhT) ; Kosower, D.A. (Saclay, SPhT) ; Skands, P. (CERN)
We present an antenna shower formalism including contributions from initial-state partons and corresponding backwards evolution. We give a set of phase-space maps and antenna functions for massless partons which define a complete shower formalism suitable for computing observables with hadronic initial states. [...]
arXiv:1210.6345; CERN-PH-TH-2012-278; CERN-PH-TH-2012-278.-
2013-01-29 - 9 p.
- Published in : Phys. Lett. B 718 (2013) 1345-1350
Fulltext: PDF;
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