HEFTinLOOPS · Effective Field Theory predictions for Higgs production processes at the Large Hadron Collider
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2017-09-01 → 2019-08-31
- EU contribution
- €175,420
- Participants
- 1
- Scheme
- MSCA-IF-EF-ST
Lines connect the coordinator with its partners.
Results in brief
Effective Field Theory predictions for Higgs production processes at the Large Hadron Collider
The Large Hadron Collider (LHC) is hunting for signs of New Physics in the vast amount of data collected by its experiments. If new states are heavier than the collider energy reach, their presence can be revealed by modications of the interactions of the known particles. The Standard Model Effective Field Theory (SMEFT) parametrises such deviations from the Standard Model, extending the sensitivity to scales beyond those directly probed at colliders. Determining the parameters of the EFT will shed light on the nature of New Physics and will provide hints to the most important questions in particle physics. A dedicated campaign of measurements and their SMEFT interpretation is a major goal of the LHC and requires coordination between experimentalists and theorists. In this effort precise predictions for Higgs and top production in the SMEFT are necessary, and my project aimed to address this challenge. My project provided important theoretical predictions for the SMEFT programme at the LHC and also the corresponding Monte Carlo tools which can be used by experimentalists and theorists. The project resulted in a series of publications in peer review journals on higher-order, precise computations of various scattering processes at the LHC, focusing on the top and Higgs sectors, as well as on the interpretation of LHC measurements within the SMEFT.
Data: CORDIS, © European Union
Project objective
The first run of the Large Hadron Collider (LHC) at the European Centre for Nuclear Research (CERN) has brought the discovery of the Higgs boson, a result of hard work by thousands of experimental and theoretical physicists. The Higgs boson was the final piece of the Standard Model (SM), a theory describing elementary particles and their interactions. The current run of the LHC at higher energy aims to thoroughly explore the interactions of the Higgs boson and search for deviations from the SM predictions. A model-independent framework to organise and parametrise deviations from the SM is that of Effective Field Theory (EFT), in which higher-dimension operators modify the interactions of the SM particles. Further work is needed to consistently examine all Higgs production channels within the EFT and in the most accurate way possible, a topic which the proposed work aims to address. In particular, the applicant aims to study a class of Higgs production processes starting at leading order with one loop, the so-called loop-induced processes, including all relevant dimension-6 operators and providing accurate predictions for the differential observables. Additionally, tree-level processes that have not been explored so far will be studied to next-to-leading order in QCD. The project will result in a public Monte Carlo implementation, which combined with the experimental measurements will be used to set constraints on the EFT operators in the last part of the project. The project meets important needs in particle physics, especially with the LHC collecting more data in the coming years. The applicant's expertise in Monte Carlo generators and Higgs physics are crucial for the completion of the proposed project, while CERN will offer an ideal environment for the researcher to strengthen ties with the experimental physicists and maintain important global collaborations, in line with the European scientific excellence commitment.
Original text from CORDIS.
Participants
- ORGANISATION EUROPEENNE POUR LA RECHERCHE NUCLEAIRE · GENEVE 23CoordinatorSwitzerland
Links
Data: CORDIS, © European Union