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Baryonic Semitauonic Measurements for Beyond Standard Model Searches

Project description

Unique particle decay at the Large Hadron Collider could unveil new physics beyond the standard model

In particle physics, the quest to discover phenomena beyond the standard model is a long-awaited goal. Funded by the Marie Skłodowska-Curie Actions programme, the BSM4BSMs project could potentially unveil new physics by measuring a unique decay involving the transition of a lambda baryon to a tau lepton. This decay tests lepton flavour universality, a main pillar of the standard model. Researchers will compare the decay rates to the tau lepton against those to electrons and muons. These ratios are expected to be 1 in the standard model, but previous experiments have shown deviations from this value. This critical measurement will be conducted at the Large Hadron Collider, enhancing sensitivity and exploring angular observables to potentially reveal new physics.

Objective

In the field of particle physics today, the search for what lies beyond our Standard Model is a long-awaited goal. My proposal will push forward this search and potentially uncover what we refer to as new physics. I will be measuring a unique decay that involves the transition of Lambda baryon to a tau lepton. This decay is an excellent avenue to test one of the main pillars of our Standard Model, an aspect referred to as Lepton Flavour Universality (LFU). Specifically, I will examine the ratio of the rates of Lambda decay to the tau lepton, as compared to the other two leptons, the electron and muon. This ratio is expected to have a value of 1 in the SM. However, similar measurements, with other parent particles, have been done at 3 other leading particle physics experiments, and a deviation from the SM expectation has been observed. As an expert in the field, I have performed one of these measurements at the Belle II experiment in a channel involving the decay of a B meson. At LHCb, I have unique access to the Lambda channel and this will allow me to perform a highly anticipated measurement in the field, one which will help complete the picture for LFU tests of the SM. Based on my wide experience at Belle II, I will perform this measurement with improved sensitivity and extend the scope of this LFU test to involve angular observables. The latter are more interesting, since contrary to the ratio, angular observables can help uncover the nature of any new physics, if it exists. To achieve my goal, I will develop a novel multivariate technique based on high-impact variables from the event information to suppress the persistent backgrounds in LHCb's noisy environment. I will also examine at new Lambda decay sub-channels, ones that have never been measured before. With my precision measurement, I will confirm or annul a persistent anomaly in the field. What ever the result, I will impact our current understanding of the origin of our universe.

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Topic(s)

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HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

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(opens in new window) HORIZON-MSCA-2023-PF-01

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Coordinator

EOTVOS LORAND TUDOMANYEGYETEM
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.

€ 157 622,40
Address
EGYETEM TER 1-3
1053 BUDAPEST
Hungary

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Region
Közép-Magyarország Budapest Budapest
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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