Description du projet
Au-delà de la détection des signaux de la «vieille physique» au Grand collisionneur de hadrons
Pendant près d’un demi-siècle, le modèle standard de la physique des particules a été (et reste en grande partie) le meilleur modèle dont nous disposons de notre monde des particules, même si nous savons que ce modèle ne peut expliquer certaines choses très importantes. La recherche de la «nouvelle physique» qui va au-delà du modèle standard pour répondre à ces questions ouvertes est généralement bien orientée – dans de nombreux cas, nous avons une bonne idée de ce que nous recherchons, mais nous n’avons pas encore trouvé de faits probants. Le projet EFT4NP, financé par l’UE, améliore les mathématiques qui nous permettront de détecter cette nouvelle physique dans les données expérimentales, ouvrant ainsi la voie à des révélations concernant celle-ci dans le cadre des expériences menées au Grand collisionneur de hadrons.
Objectif
The Large Hadron Collider (LHC) is hunting for signs of New Physics (NP) 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 modifications of the interactions of the known particles. The Standard Model Effective Field Theory (SMEFT) parametrises such deviations from the SM, extending the sensitivity to scales beyond those directly probed at colliders. Determining the parameters of the EFT will shed light on the nature of NP and will provide hints to the most important questions in particle physics, such as the shape of the Higgs potential, its relation to electroweak baryogenesis and the amount of CP-violation and its connection to the matter-anti-matter asymmetry. A dedicated campaign of measurements and their SMEFT interpretation is a major goal of the LHC and requires coordination between experimentalists and theorists.
I aim at making essential beyond the state-of-the-art theoretical contributions to the LHC SMEFT programme by:
1) Providing the first fully generic next-to-leading order QCD and electroweak Monte Carlo implementation of SMEFT operators, to allow theorists and experimentalists to perform realistic simulations.
2) Combining accurate SMEFT predictions with LHC data to constrain the operators through a novel robust global determination. The findings, particularly if different from the SM expectations, will point to the scale and nature of NP.
3) Exploring new challenging proposals, such as i) the impact of operator running and mixing and ii) the optimisation of ways of extracting the Higgs self-coupling and probing CP-violation at the LHC, two topics with profound implications for our theoretical understanding of particle physics.
The proposal plays to a key strength of my research expertise and my research record uniquely positions me to successfully lead this ambitious project, which is vital to exploit the full LHC potential.
Champ scientifique
Programme(s)
Thème(s)
Régime de financement
ERC-STG - Starting GrantInstitution d’accueil
M13 9PL Manchester
Royaume-Uni