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| Description | Speaker: Xiaochuan Lu Title: Effective Field Theories: Truncation, Validity, and Uncertainty Room: 3024 Zoom: https://zoom.us/j/186024391 Host: Luty Abstract: The application of SMEFT for motivating and interpreting LHC searches has received growing attention in recent years. Despite numerous technical and practical developments, currently there is still no consensus regarding how to address the issues of validity and uncertainties associated with the SMEFT truncation in operator dimension. Establishing a prescription for how to use SMEFT at the LHC is of paramount importance. In this talk, I present a new approach that takes a small step toward this goal. Working with a toy case, we demonstrate that when the search channel is sufficiently inclusive in terms of the energy of the final state particles, an EFT description could still be valid even when the new physics scale is significantly below the center of mass energy at the LHC, due to the proper inclusion of PDF effects. This observation can be applied to modify the standard perturbative partial wave unitarity conditions to understand the question of EFT validity from the bottom up. |
| Date | Mon, March 7, 2022 |
| Time | 1:30pm-3:00pm PST |
| Duration | 1 hour 30 minutes |
| Access | Public |
| Created by | High-Energy Seminars |
| Updated | Tue, March 1, 2022 6:02am PST |
| Send Reminder | Yes - 1 day 0 hour 0 minutes before start |
