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Joint Theory Seminar: Xiaochuan Lu

Description Speaker: Xiaochuan Lu
Title: Constraining BSM custodial violations beyond the oblique framework
Zoom: https://zoom.us/j/186024391
Host: Markus Luty

Abstract: BSM custodial violations are believed to be strongly constrained by electroweak precision measurements. In particular, they result in a nonzero Peskin-Takeuchi T parameter, which is experimentally bounded at the per-mille level. However, the T parameter constraint only applies to oblique BSM physics. When the BSM effects are not oblique, T parameter is no longer an observable, and it fails to serve as an indicator of BSM custodial violations. We take a first step at addressing this problem by working with SMEFT at the dim-6 and tree level. We identify new observables that can serve as unambiguous indicators of BSM custodial violations.
Date Mon, March 15, 2021
Time 1:30pm-2:30pm PDT
Duration 1 hour
Access Public
Created by High-Energy Seminars
Updated Fri, March 12, 2021 1:36pm PST
Send Reminder Yes  -  0 days 8 hour 0 minutes before start

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