Project description
Novel approach to measuring CP violation could refine understanding of matter-antimatter asymmetry
The Standard Model of particle physics cannot fully explain the matter-antimatter asymmetry in the Universe, making the search for new CP-violating sources a high priority. With the support of the Marie Skłodowska-Curie Actions programme, the SimDalitzCPV project plans to measure CP violation in specific particle decays that are highly sensitive to potential new physics effects. Using a large data set from the LHCb experiment, the proposed study will employ an analytic method (Dalitz plot) to extract CP-violating observables with high precision. Project findings are expected to provide a new way to test the and its limitations, laying the groundwork for future studies and improving understanding of CP violation.
Objective
The amount of CP violation in the Standard Model (SM) of particle physics is not sufficient to explain the matter-antimatter asymmetry in the Universe, and thus searching for new CP-violating sources beyond the SM is of high priority in particle physics. The goal of this fellowship is to address this challenge by performing a novel measurement of CP violation simultaneously in the Bs -> KS K+ pi- and Bs -> KS K- pi+ decays. The two decays have dominant contributions from the b->s loop transition to which New Physics (NP) effects could have sizable contributions.
The method will first be developed with a standalone study. This will investigate several factors that can affect the precision of the measurement of CP-violating observables in Bs -> KS K+- pi-+ decays, including the sample size and the amplitude model variations. This will provide crucial insight for the subsequent measurement using real data and future studies involving two final states.
The LHCb experiment has collected a large sample of Bs -> KS K+- pi-+ decays to date, which is expected to increase significantly in the next two years. This data sample will be used to perform the first decay-time-dependent Dalitz-plot analysis to the KS K+ pi- and KS K- pi+ final states simultaneously, and to determine the associated CP-violating observables.
The results of the analysis will provide a novel method to test the SM. The theoretical interpretation of in terms of potential NP sources of CP violation benefits from U-spin relations with the companion Bd -> KS K+- pi-+ decay, which can be used to control hadronic uncertainties. Analyses of the Bd modes will require larger data samples, which are not included in the baseline plan of this project. However, this project will set the stage for these measurements, developing all necessary methodology for a systematically improvable precise test of the SM.
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Keywords
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Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
MAIN PROGRAMME
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Topic(s)
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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
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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
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Call for proposal
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) HORIZON-MSCA-2024-PF-01
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CV4 8UW COVENTRY
United Kingdom
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