H2020Индивидуална стипендия2018–2020

HiProLoop · Scattering Amplitudes for Higgs Production at High-Order as touchstone for Automated Multiloop Feynman Calculus

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2018-09-01 → 2020-08-31
Финансиране от ЕС: 168 277 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Математическите структури при сблъсъка на частици, като например производството на Хигс бозон, се анализират чрез специални интеграли. Прецизните изчисления помагат да се намалят теоретичните грешки, за да се открият признаци на нова физика в експериментите на ЦЕРН.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Scattering Amplitudes for Higgs Production at High-Order as touchstone for Automated Multiloop Feynman Calculus

My project is concerned with particle physics, and more specifically the phenomenology of particle scattering and the underlying mathematical structures. Particle physics of this sort, is of relevance to experiments such as those taking place at the Large Hadron Collider at CERN, for which the crowning achievement of the LHC was the 2012 discovery of the Higgs particle. To get even more out of these experiments, high accuracy precision calculations of the scattering cross sections of the processes observed at colliders are crucial in order to diminish the theoretical uncertainties to levels below that of the ever decreasing experimental uncertainty, and be able to see signs of potential new physics that may be hiding behind the overwhelming background of known physical effects. Shortly after my arrival in Padova I started working on a new direction that had been opened up by my collaborator in Padova, professor Pierpaolo Mastrolia. This project was concerned with the use of the mathematical field of intersection theory in connection with particle physics and Feynman integrals. This became my main project during my time in Padova, having resulted in 3 papers so far, one of which got published in the prominent journal Physical Review Letters (PRL). Another project on which I spent a lot of effort during the two years, concerns a specific aspect of the physics of the Higgs boson (its production together with a hadronic jet). That project has given rise to two publications during my time in Padova. Another project I was working on was concerned with the electro-weak sector of the Standard model with regards to the simultaneous production of a Z-boson and a hadronic jet, in which the main task was computing the relevant Feynman integrals in a specific approximation. This has resulted in one publication containing the integrals, and the scattering amplitude and the cross section are forthcoming. In total I had six publications during my time in Padova. The conference I proposed in my application got organized under the name of MathemAmplitudes, and it was held December 18-20 2019 in Padova. I consider MathemAmplitudes a success, as it for the first time gathered together physicists and mathematicians to discuss the new directions opened up with regards to the relation between Feynman integrals and the mathematical field of intersection theory.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Scattering Amplitudes sit at the core of quantum field theory. On the one side, they capture the high energy regimes of fundamental interactions among elementary particles, hence, their accurate determination is a crucial test for the predictive power of the theoretical frameworks Particle Physics is based on. On the other side, scattering amplitudes are the tiniest mathematical lab of the Universe, where more formal investigations about the symmetries ruling particle interactions can be performed. New relations and dualities involving scattering amplitudes may become manifest only through their actual calculations at higher orders in perturbation theory, yet invisible to the canonical approach to quantum field theory. Therefore, progress in the ability of computing scattering amplitudes at very high accuracy is crucial for understanding the fundamental interactions and for providing accurate predictions within phenomenological analyses. HiProLoop aims at providing the most accurate determination of the virtual contributions to amplitudes relevant for Higgs phenomenology, by considering 1) the associated production of a Higgs boson and a jet at 2-loop, 2) the Higgs boson production in gluon fusion at 3-loop, as well as 3) the photon-pair production in association with a jet at 2-loop. The latter process is an important background to the process-1, and it can also be considered as a touchstone for the automation of generic 2-loop scattering amplitudes at high multiplicity. This effort should culminate in the development of a solid framework for the evaluation of generic 2-loop scattering amplitudes, which represent a currently open, urgent problem. Therefore the results of HiProLoop will become milestones for the theoretical physics community. HiProLoop will exploit mutual exchange of competences and tools between Theoretical Physics, Algebraic Geometry, Number Theory and Computer Science. The dissemination of the results will follow an ambitious communication plan.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITA DEGLI STUDI DI PADOVA · PadovaКоординаторИталия