Project description
Sharpening Higgs measurements for future discoveries
The Higgs boson is a special particle that helps explain why everything in the universe has mass. Scientists at the Large Hadron Collider can now study the Higgs in great detail, but they need very accurate theoretical predictions to compare with the data. With the support of the Marie Skłodowska-Curie Actions programme, the BBJAmps project aims to improve these predictions by studying a particular type of particle event involving the Higgs, another particle called the Z boson, and a burst of particles known as a jet. Understanding this reaction helps scientists to understand how the Higgs behaves and measure how strongly it interacts with other particles. By creating more precise calculations and methods, the project will help advance particle physics.
Objective
The data taken at the Large Hadron Collider (LHC) at CERN and its future High-Luminosity upgrade enables the study of the fundamental interactions of matter at unprecedented precision and energy. After the discovery of the Higgs boson one of the major goals of the LHC is the precise measurement of its properties. In order to achieve the needed theoretical precision, two-loop corrections to many scattering amplitudes have to be computed.
A crucial process to precisely determine the coupling of the Higgs boson to the bottom quark is the production of a Higgs, a Z-boson, and a jet. This process receives large contributions and accompanying uncertainties from the sub-process of gluon fusion, which only starts contributing at the one-loop level but is enhanced by the large gluon luminosity at hadron colliders. To improve the theoretical description of this sub-process and enable the most precise
determination of the Higgs-bottom coupling, the two-loop five-point amplitudes of this sub-process will be computed in this project. The results of this project can also be applied to double Higgs production, which the crucial experimental signature to determine the Higgs self-interaction at hadron colliders in the future.
The computation of five-point amplitudes with massive internal and external particles is a tremendously difficult task, due to the algebraic complexity of the amplitudes and the appearance of new classes of special functions. To tackle and circumvent some of the difficulties I will explore the systematic approximation of these complicated amplitudes in various kinematic limits, like small Mandelstam variables or the high-energy limit. This methodology has already proven successful for two-loop four-point amplitudes previously. The results of this project will, therefore, significantly enhance our ability to obtain precise theory predictions for high-multiplicity processes and simplify their calculation and numerical evaluation.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences physical sciences theoretical physics particle physics particle accelerator
- natural sciences physical sciences theoretical physics particle physics z bosons
- natural sciences physical sciences theoretical physics particle physics gluons
- natural sciences physical sciences theoretical physics particle physics quarks
- natural sciences physical sciences theoretical physics particle physics higgs bosons
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
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Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) HORIZON-MSCA-2024-PF-01
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Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
1211 GENEVE 23
Switzerland
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.