# Probing the flavor of new physics in semileptonic transitions at high-pT

- Institution: CERN
- Department: Workshops
- Speaker: Felix Wilsch
- Year: 2022
- Language: English
- Subjects: Physics
- Source: [CERN](https://videos.cern.ch/record/3017708)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

High-$p_T$ tail observables at the LHC offer a complementary probe to low-energy experiments for studying the flavor structure of the Standard Model and beyond. We discuss the high-$p_T$ tails of neutral- and charged-current Drell-Yan processes to probe New Physics (NP) effects in semileptonic transitions. For this purpose, we describe the relevant cross-sections in terms of general form-factors, which are matched to the Standard Model Effective Field Theory (SMEFT), or to new resolved bosonic mediators arising in ultraviolet models. Using the latest run-2 datasets from LHC on the relevant mono-lepton and di-lepton production channels, we derive constraints on the SMEFT Wilson coefficients and the NP coupling constants. We also present the Mathematica package `HighPT`, which provides a simple way to compute the relevant high-$p_T$ tail observables and to extract the complete LHC likelihood for Drell-Yan with general flavor structure. To illustrate the relevance of these results, we revisit the leptoquark explanations of the charged-current $B$-meson anomalies, by exploring the complementarity of our high-$p_T$ constraints with the relevant low-energy observables..

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## Lectures

1. [Probing the flavor of new physics in semileptonic transitions at high-pT](https://invisiblenetwork.ai/learn/cern/3017708/678b3d07f04b), 24 min (CERN's player)