Descrizione del progetto
Elaborare calcoli di cromodinamica quantistica reticolare di precisione
La cromodinamica quantistica reticolare simula l’interazione tra quark e gluoni. I calcoli di cromodinamica quantistica sono eseguiti sui computer più veloci al mondo. Il progetto BCFS, finanziato dall’UE, realizzerà calcoli di cromodinamica quantistica reticolare di precisione per sostenere la ricerca della nuova fisica superando il modello standard. Affronterà le anomalie, quali il momento magnetico anomalo del muone e le verifiche dell’universalità dei leptoni in decadimenti semileptonici dei mesoni B, integrando le ricerche per la nuova fisica tramite il calcolo di dati adronici, in grado di permettere la definizione di elementi della matrice Cabibbo-Kobayashi-Maskawa, fornendo in tal modo test di precisione del modello standard. In generale, il progetto fornirà dati fondamentali per la ricerca di fenomeni fisici oltre il modello standard, necessari per sfruttare i grandi esperimenti in corso presso il Large Hadron Collider.
Obiettivo
We propose precision lattice QCD computations aiding the search for new physics beyond the Standard Model. In particular, we will address currently observed anomalies such as those displayed in the anomalous magnetic moment of the muon and lepton flavour universality tests in semi-leptonic B meson decays. We will further supplement searches for new physics through the computation of hadronic inputs, which combined with experimental results allow the determination of elements of the Cabibbo-Kobayashi-Maskawa matrix, thereby providing precision tests of the standard model.
We will compute a large set of hadronic form factors of semi-leptonic B(s) and D(s) meson decays including pseudo-scalar and vector final
states. State-of-the-art computations of these have two major shortcomings: the use of effective theories for the b-quark, and the treatment of vector final states as QCD-stable particles. We will eliminate the former of these by utilising very fine lattices which allow for the direct simulation of the b-quark near its physical mass. The latter will be addressed by merging specialist expertise in the computation of such form factors with that of hadronic scattering processes. This will result in the first calculation that takes the unstable nature of the vector final states in QCD into account. This is of paramount importance in order to address the observed anomalies in the B to D* and B to K* decays. We will compute the full basis of possible currents thereby providing standard model predictions as well as inputs for tests of beyond the standard model theories. Further, we will use the approach of massive QED in lattice QCD computations to provide an independent cross check of the electromagnetic corrections to the hadronic vacuum polarisation. This work will provide vital inputs in searches for physics beyond the standard model which are needed to fully exploit large ongoing experiments at the Large Hadron Collider and at facilities in Japan and the US.
Campo scientifico
- natural sciencesphysical sciencestheoretical physicsparticle physicsleptons
- natural sciencesphysical sciencestheoretical physicsparticle physicsparticle accelerator
- engineering and technologymaterials engineeringcolors
- natural sciencesmathematicspure mathematicsdiscrete mathematicsmathematical logic
- engineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringcomputer hardwaresupercomputers
Parole chiave
Programma(i)
Argomento(i)
Meccanismo di finanziamento
MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)Coordinatore
5230 Odense M
Danimarca