Baryonic Semitauonic Measurements for Beyond Standard Model Searches

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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.