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CERN Document Server 65 registres trobats  1 - 10següentfinal  anar al registre: La cerca s'ha fet en 0.61 segons. 
1.
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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2.
Gravitational Effective Field Theory Islands, Low-Spin Dominance, and the Four-Graviton Amplitude / Bern, Zvi (UCLA) ; Kosmopoulos, Dimitrios (UCLA) ; Zhiboedov, Alexander (CERN)
We analyze constraints from perturbative unitarity and crossing on the leading contributions of higher-dimension operators to the four-graviton amplitude in four spacetime dimensions, including constraints that follow from distinct helicity configurations. We focus on the leading-order effect due to exchange by massive degrees of freedom which makes the amplitudes of interest infrared finite. [...]
arXiv:2103.12728; CERN-TH-2021-035.- 2021-08-08 - 123 p. - Published in : J. Phys. A 54 (2021) 344002 Fulltext: document - PDF; 2103.12728 - PDF;
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3.
Non-renormalization and operator mixing via on-shell methods / Bern, Zvi (CERN ; UCLA) ; Parra-Martinez, Julio (UCLA) ; Sawyer, Eric (UCLA)
Using on-shell methods, we present a new perturbative non-renormalization theorem for operator mixing in massless four-dimensional quantum field theories. By examining how unitarity cuts of form factors encode anomalous dimensions we show that longer operators are often restricted from renormalizing shorter operators at the first order where there exist Feynman diagrams. [...]
arXiv:1910.05831; UCLA/TEP/2019/105; CERN-TH-2019-160.- 2020-02-05 - 6 p. - Published in : Phys. Rev. Lett. 124 (2020) 051601 Article from SCOAP3: PDF; Fulltext: PDF;
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Modernizing Legacy Codes for Next-Generation Storage Infrastructures: A Case Study of PALM on Intel DAOS / Christgau, Steffen (speaker) (Zuse Institute Bern)
We present our early experiences with the Distributed Asynchronous Object Storage (DAOS) focusing on its usage for checkpointing with the real-world scientific application PALM. The presentation includes an introduction of the of large eddy simulation and its legacy Fortran IO checkpointing mechanism. [...]
2019 - 1813. other events or meetings; IXPUG 2019 Annual Conference at CERN External links: Talk details; Event details In : IXPUG 2019 Annual Conference at CERN
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5.
The Duality Between Color and Kinematics and its Applications / Bern, Zvi (UCLA ; CERN) ; Carrasco, John Joseph (Northwestern U. ; IPhT, Saclay) ; Chiodaroli, Marco (Uppsala U.) ; Johansson, Henrik (Uppsala U. ; Stockholm U. ; Royal Inst. Tech., Stockholm) ; Roiban, Radu (Pennsylvania U.)
This review describes the duality between color and kinematics and its applications, with the aim of gaining a deeper understanding of the perturbative structure of gauge and gravity theories. We emphasize, in particular, applications to loop-level calculations, the broad web of theories linked by the duality and the associated double-copy structure, and the issue of extending the duality and double copy beyond scattering amplitudes. [...]
arXiv:1909.01358; CERN-TH-2019-135; UCLA/TEP/2019/104; NUHEP-TH/19-11; UUITP-35/19, NORDITA 2019-079.- 2024-08-08 - 180 p. - Published in : J. Phys. A 57 (2024) 333002 Fulltext: 1909.01358 - PDF; document - PDF;
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6.
Black Hole Binary Dynamics from the Double Copy and Effective Theory / Bern, Zvi (UCLA ; CERN) ; Cheung, Clifford (Caltech, Pasadena (main)) ; Roiban, Radu (Penn State U., University Park, IGC) ; Shen, Chia-Hsien (UCLA) ; Solon, Mikhail P. (Caltech, Pasadena (main)) ; Zeng, Mao (Zurich, ETH)
We describe a systematic framework for computing the conservative potential of a compact binary system using modern tools from scattering amplitudes and effective field theory. Our approach combines methods for integration and matching adapted from effective field theory, generalized unitarity, and the double-copy construction, which relates gravity integrands to simpler gauge-theory expressions. [...]
arXiv:1908.01493; CERN-TH-2019-128; CALT-TH 2019-026; UCLA/TEP/2019/103.- 2019-10-21 - 134 p. - Published in : JHEP 1910 (2019) 206 Article from SCOAP3: PDF; Fulltext: PDF;
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The generalized double copy and its applications to UV properties of supergravity theories. / Bern, Zvi (speaker)
Recent years have seen enormous progress in our ability to compute elementary-particle scattering processes in quantum field theory.  We will describe the application of modern ideas, including the duality between color and kinematics and advanced loop-integration methods, to studies of the ultraviolet properties of quantum gravity theories. [...]
2018 - 4397. Theory Colloquium External link: Event details In : The generalized double copy and its applications to UV properties of supergravity theories.
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8.
Double-Copy Constructions and Unitarity Cuts / Bern, Zvi (CERN ; UCLA) ; Davies, Scott (UCLA) ; Nohle, Josh (Nordita ; Royal Inst. Tech., Stockholm ; Stockholm U.)
The duality between color and kinematics enables the construction of multiloop gravity integrands directly from corresponding gauge-theory integrands. This has led to new nontrivial insights into the structure of gravity theories, including the discovery of enhanced ultraviolet cancellations. [...]
arXiv:1510.03448; UCLA-15-TEP-102; NORDITA-2015-110; CERN-PH-TH-2015-218; UCLA-15-TEP-102; NORDITA-2015-110; CERN-PH-TH-2015-218.- Geneva : CERN, 2016-05-09 - 16 p. - Published in : Phys. Rev. D 93 (2016) 105015 APS Open Access article: PDF; Fulltext: 10.1103_PhysRevD.93.105015 - PDF; arXiv:1510.03448 - PDF; External link: Preprint
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9.
Evanescent Effects Can Alter Ultraviolet Divergences in Quantum Gravity without Physical Consequences / Bern, Zvi (UCLA ; CERN) ; Cheung, Clifford (Caltech, Pasadena (main)) ; Chi, Huan-Hang (SLAC) ; Davies, Scott (UCLA) ; Dixon, Lance (Caltech, Pasadena (main) ; SLAC) ; Nohle, Josh (UCLA)
Evanescent operators such as the Gauss-Bonnet term have vanishing perturbative matrix elements in exactly D=4 dimensions. Similarly, evanescent fields do not propagate in D=4; a three-form field is in this class, since it is dual to a cosmological-constant contribution. [...]
arXiv:1507.06118; SLAC-PUB-16332; CERN-PH-TH-2015-162; UCLA-15-TEP-101; CALT-2015-036.- Geneva : CERN, 2015 - 6 p. - Published in : Phys. Rev. Lett. 115 (2015) 211301 APS Open Access article: PDF; Fulltext: PDF; External link: Preprint
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10.
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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140 Bern, Z
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