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Search for New Physics in First and Second Generation Quark Yukawa Couplings through Rare Exclusive Decays of the Observed Higgs Boson

Objective

Following the discovery of a Higgs boson with a mass of about 125 GeV,
a detailed set of property measurements has confirmed that it plays a
central role in the spontaneous breaking of the electroweak symmetry.
Nevertheless, its role in the generation of fermion mass, in
particular of the first and second generation, is still unclear. In
the Standard Model (SM) this is implemented in an ad hoc manner through
Yukawa interactions, and many beyond-the-SM theories offer rich
phenomenology and exciting prospects for the discovery of New Physics in this sector.

This project will attack - for the first time - in a
systematic and comprehensive way the experimentally most unconstrained
sector of the SM: the couplings of the light-quarks (up, down, charm
and strange) to the Higgs boson, including possible flavour-violating
interactions. The rare exclusive Higgs boson decays to a
meson and a photon or Z boson, which is a novel and unique approach, will be searched for with the ATLAS
detector at the CERN Large Hadron Collider (LHC). At the same time,
an extensive set of measurements of analogous rare exclusive decays of
the W and Z bosons will be performed, further enhancing the scientific
value of the proposed research programme.

The expected branching ratio sensitivity of 10^{-6} for the Higgs
boson decays, and 10^{-9} for the W and Z boson decays will probe
viable New Physics models, and in several cases will reach and surpass the
SM predictions. This project will lead to a profound extension
of the ATLAS and LHC physics output, going beyond what was previously
considered possible. It will open a new line of research in the Higgs
sector, providing relevant input to many different areas of frontier
research, including particle cosmology and planning for possible
future particle physics facilities.

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Keywords

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Programme(s)

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Topic(s)

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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.

ERC-STG - Starting Grant

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Call for proposal

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

(opens in new window) ERC-2016-STG

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Host institution

THE UNIVERSITY OF BIRMINGHAM
Net EU contribution

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.

€ 1 499 945,00
Address
Edgbaston
B15 2TT Birmingham
United Kingdom

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Region
West Midlands (England) West Midlands Birmingham
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.

€ 1 499 945,00

Beneficiaries (1)

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