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Abstract:Electroweak unification theory, one of the greatest successes of the Standard Model,predicts and accurately describes elementary particles and their interactions. Precisemeasurements of its fundamental parameters provide stringent tests of the Standard Modeland a powerful probe for new physics beyond collider scales. As a forward spectrometer atthe LHC with unique kinematic acceptance, LHCb offers a distinctive platform forelectroweak and top-quark physics in the forward region. This summary presents LHCb'skey results in these fields, including precise measurements of W/Z boson masses and theweak mixing angle, studies on Z boson polarization and production cross sections, and thelatest top-quark charge asymmetry result. Future prospects of precision electroweak andtop-quark measurements at LHCb are also outlined.
About the speaker:Menglin Xu is currently a Research Fellow at CERN. She obtained her doctoral degreefrom Central China Normal University in 2021. She carried out postdoctoral research at theUniversity of Warwick, UK from 2021 to 2024. Her research directions include precisionelectroweak measurements, top-quark physics studies and high-precision simulations withthe LHCb experiment. She once worked as the convenor of the LHCb Electroweak andStandard Model Physics Analysis Group. At present, she serves as the representative ofthe LHCb Collaboration in the LHC Electroweak Precision Physics Working Group, theLHCb Detector Simulation Coordinator, and the convenor of the simulation area of theHigh Energy Physics Software Foundation (HSF). Thanks to the groundbreakingcontributions to electroweak physics and detector software, she received the University ofWarwick Postdoctoral Prize and the LHCb Collaboration Early Career Award successivelyfrom 2023 to 2024.
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