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Content archived on 2024-05-28

Exploring New Phenomena through Flavour Changing Neutral Currents with LHCb

Objective

The Standard Model (SM) of particle physics has been very successful in describing phenomena at the smallest scales, yet we know that it is incomplete.
It does not, for example, explain the matter-antimatter asymmetry in the universe or provide a dark matter candidate.
Attempts to solve these open questions do so by introducing as yet undiscovered particles.
If these particles exist, they will appear as virtual particles in quantum loops, where they can affect the rate and angular distributions of particle decays.

The main objective of this proposal is the study of rare flavour changing neutral current transitions in b-hadrons, where a b-quark decays to an s- or d-quark and a pair of muons.
These processes are highly suppressed in the SM and the presence of new virtual particles can therefore have a comparably large effect.
In particular the decay of a B-meson to a K* meson and a muon pair provides many observables that have excellent sensitivity to particles beyond the SM.

I propose a direct fit of the generalised couplings in this decay using the full data sample recorded by the LHCb collaboration.
To achieve optimal sensitivity to possible contributions beyond the SM the fit algorithm will use the full available information of the final state (decay angles, decay flavour and invariant mass of the dimuon system).
A benefit of this approach is that the fit can help to constrain sources of theoretical uncertainty that can otherwise limit the sensitivity.

In addition, I propose to perform a first three-dimensional angular fit of the decay of a Bs meson to a phi meson and a muon pair.
This fit will determine several interesting CP-asymmetries with high sensitivity to contributions beyond the SM.

To complete the picture of semileptonic B-decays, I will study b-quark to d-quark transitions.
These decays are further suppressed in the SM and allow to test the flavour structure of nature.

Fields of science (EuroSciVoc)

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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.

Call for proposal

Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.

FP7-PEOPLE-2013-IEF
See other projects for this call

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.

MC-IEF - Intra-European Fellowships (IEF)

Coordinator

UNIVERSITY OF WARWICK
EU contribution
€ 221 606,40
Address
KIRBY CORNER ROAD UNIVERSITY HOUSE
CV4 8UW COVENTRY
United Kingdom

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Region
West Midlands (England) West Midlands Coventry
Activity type
Higher or Secondary Education Establishments
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Total cost

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.

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