Project description
Study sheds new light on leptonic B decays
Exclusive semi-leptonic B decays are processes where a B meson decays into a final state consisting of a lighter meson and a lepton-neutrino pair. These decays are crucial for measuring fundamental parameters of the standard model and searching for new particles and interactions. Recent experimental tensions with standard model predictions highlight the need for rigorous studies. Funded by the Marie Skłodowska-Curie Actions programme, the QED4X project aims to investigate structure-dependent electromagnetic corrections in these decays using effective field theory and factorisation methods. The research will focus on how photon couplings affect decay rates and angular distributions, incorporating novel hadronic parameters to improve precision. QED4X will develop factorisation theorems for charged and neutral-current semi-leptonic transitions, address endpoint singularities and develop a collinear-photon treatment for electronic channels.
Objective
Exclusive semi-leptonic B decays provide an important laboratory for measuring fundamental parameters of the Standard Model (SM), or to search for yet unknown particles and interactions. Various tensions between experimental measurements and SM predictions have been guiding the theoretical efforts over the past years.
To draw reliable conclusions from the anticipated experimental high-precision data for such decays in the coming years, requires a rigorous study of sub-leading corrections that have been neglected so far. With the proposed action, the researcher aims to investigate the impact of so-called structure-dependent electromagnetic corrections to kinematic distributions in semi-leptonic B decays, using modern Effective Field Theory and factorization methods.
A systematic study of QED corrections along these lines is a relatively new field of research, and in certain cases revealed surprising enhancement mechanisms not captured in a pointlike-meson description. An analysis of these effects in semi-leptonic transitions at the differential level is ambitious, and phenomenologically interesting. Photon couplings between the charged leptons and the meson constituents might lead to enhanced effects in rates or angular distributions. Uncertainties from novel hadronic parameters must be added to clean ratios with reduced hadronic uncertainties.
Conceptually, factorization is achieved using of Soft-Collinear Effective Theory and Heavy-Quark Effective Theory. The analysis of these decay amplitudes require modern sub-leading power techniques to deal with technical difficulties such as endpoint singularities.
The action is subdivided into four work-packages (WP): Factorization theorems for charged and neutral-current semi-leptonic transitions are derived in WP1 and WP2, respectively. Novel concepts regarding the treatment of endpoint-singularities are developed in WP3, and WP4 aims at a collinear-photon inclusive 'jet-like' treatment of electronic channels.
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.
You need to log in or register to use this function
We are sorry... an unexpected error occurred during execution.
You need to be authenticated. Your session might have expired.
Thank you for your feedback. You will soon receive an email to confirm the submission. If you have selected to be notified about the reporting status, you will also be contacted when the reporting status will change.
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.
-
HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
MAIN PROGRAMME
See all projects funded under this programme
Topic(s)
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.
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
See all projects funded under this funding scheme
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-2023-PF-01
See all projects funded under this callCoordinator
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.