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Biography

Ruth Britto is a theoretical physicist studying fundamental interactions. She is best known for her work on scattering amplitudes, which are mathematical functions characterizing the production of elementary particles, for example in high-energy collider experiments designed for discovering and analyzing new particles and new physical behaviours. She is currently probing deep mathematical structure in these functions, with the aim of offering powerful computational algorithms and revealing unknown principles of quantum field theory. Born in Binghamton, New York, she earned degrees in mathematics from MIT and in physics from Harvard, and held research positions at the Institute for Advanced Study, the University of Amsterdam, Fermi National Accelerator Laboratory, and the Commissariat à l'énérgie atomique before coming to Trinity College Dublin in 2014, where she is an Associate Professor in Theoretical Physics.

Research Tags

High Energy Physics Mathematical Physics Particle physics, fields theory QUANTUM CHROMODYNAMICS QUANTUM FIELD-THEORY

Research Projects

Project Title

Loop Amplitudes in Quantum Field Theory

From

2015-10-01

2020-09-30

Summary

The traditional formulation of relativistic quantum theory is ill-equipped to handle the range of difficult computations needed to describe particle collisions at the Large Hadron Collider (LHC) within a suitable time frame. Yet, recent work shows that probability amplitudes in quantum gauge field theories, such as those describing the Standard Model and its extensions, take surprisingly simple forms. The simplicity indicates deep structure in gauge theory that has already led to dramatic computational improvements, but remains to be fully understood. For precision calculations and investigations of the deep structure of gauge theory, a comprehensive method for computing multi-loop amplitudes systematically and efficiently must be found. The goal of this proposal is to construct a new and complete approach to computing amplitudes from a detailed understanding of their singularities, based on prior successes of so-called on-shell methods combined with the latest developments in the mathematics of Feynman integrals. Scattering processes relevant to the LHC and to formal investigations of quantum field theory will be computed within the new framework.

Funding Agency

European Research Council

Programme

Horizon2020

Project Type

Consolidator Grant

Publications and other Research Outputs

Ruth Britto, Generalized Cuts of Feynman Integrals in Parameter Space, Physical Review Letters, 131, (9), 2023, Journal Article, PUBLISHED

Gardi, Einan and Abreu, Samuel and Britto, Ruth and Duhr, Claude and Matthew, James, The diagrammatic coaction, Proceedings of Science, 16th DESY Workshop on Elementary Particle Physics: Loops and Legs in Quantum Field Theory 2022 (LL2022), Ettal, Germany, LL2022, 2022, pp015-, Conference Paper, PUBLISHED DOI URL

Ruth Britto, Riccardo Gonzo, Guy R. Jehu, Graviton particle statistics and coherent states from classical scattering amplitudes, Journal of High Energy Physics, 03, 2022, p214-, Journal Article, PUBLISHED URL

Abreu, Samuel and Britto, Ruth and Duhr, Claude, The SAGEX review on scattering amplitudes Chapter 3: Mathematical structures in Feynman integrals, Journal of Physics A, 55, (44), 2022, p443004-, Journal Article, PUBLISHED DOI URL

Ruth Britto, Guy R. Jehu, Andrea Orta, Proving the dimension-shift conjecture, SciPost Physics Proceedings, Radcor and LoopFest 2021, 2021, 202106001, 2021, Conference Paper, PUBLISHED URL

Ruth Britto, Guy R. Jehu, Andrea Orta, The dimension-shift conjecture for one-loop amplitudes, Journal of High Energy Physics, 04, 2021, p276-, Journal Article, PUBLISHED URL

Ruth Britto, Sebastian Mizera, Carlos Rodriguez, Oliver Schlotterer, Coaction and double-copy properties of configuration-space integrals at genus zero, Journal of High Energy Physics, 05, 2021, p053-, Journal Article, PUBLISHED URL

Samuel Abreu, Ruth Britto, Claude Duhr, Einan Gardi, James Matthew, The diagrammatic coaction beyond one loop, Journal of High Energy Physics, 10, 2021, p131-, Journal Article, PUBLISHED URL

Samuel Abreu, Ruth Britto, Claude Duhr, James Matthew, Einan Gardi, Generalized hypergeometric functions and intersection theory for Feynman integrals, Proceedings of Science, RADCOR 2019, Avignon, 2020, Conference Paper, PUBLISHED URL

Samuel Abreu, Ruth Britto, Claude Duhr, Einan Gardi, James Matthew, Diagrammatic Coaction of Two-Loop Feynman Integrals, Proceedings of Science, RADCOR 2019, Avignon, 2020, Conference Paper, PUBLISHED URL

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Research Interests

Description Of Research Interests

Scattering amplitudes play a key role in high-energy physics. Not only do they describe the actual scattering taking place in collider experiments--of current importance in the era of the Large Hadron Collider (LHC)--but they also illuminate the formal aspects of quantum field theories, such as divergent behavior or integrability. Amplitudes are thus useful both practically and formally, but their availability is limited by the difficulty of computing them. As the number of particles in the scattering process increases, or the perturbative expansion is carried out to higher order, the traditional technique of Feynman rules fails to be feasibly implementable. This difficulty has prompted the innovation of new techniques. Notable among these are on-shell techniques, in which the basic building blocks are complete amplitudes, rather than fundamental interactions. The on-shell framework has surpassed traditional Feynman diagram expansions, both in delivering new results and in expressing them in formulas that are not only compact, but also deeply illuminating. My research develops the on-shell framework to incorporate all theories and configurations of physical interest, building upon recent developments in pure mathematics.

Trinity College Dublin, The University of Dublin

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Dr. Ruth Britto

Dr. Ruth Britto

Associate Professor (Pure & Applied Mathematics)

18 WESTLAND ROW

brittor@tcd.ie

3531896 3945