Generic Tests of $CP$ Violation in High-${p}_{T}$ Multilepton Signals at the LHC and Beyond

Open Access

Generic Tests of $C P$ Violation in High- $p_{T}$ Multilepton Signals at the LHC and Beyond

Yoav Afik, Shaouly Bar-Shalom, Kuntal Pal, Amarjit Soni, and Jose Wudka

Phys. Rev. Lett. 131, 171801 – Published 23 October 2023

Abstract

We introduce a modification to the standard expression for tree-level $C P$ violation in scattering processes at the LHC, which is important when the initial state is not self-conjugate. Based on that, we propose a generic and model-independent search strategy for probing tree-level $C P$ violation in inclusive multilepton signals. We then use TeV-scale 4-fermion operators of the form $t u ℓ ℓ$ and $t c ℓ ℓ$ with complex Wilson coefficients as an illustrative example and show that it may generate $O (10 %)$ $C P$ asymmetries that should be accessible at the LHC with an integrated luminosity of $O (1000) {fb}^{- 1}$ .

Received 5 January 2023
Revised 28 August 2023
Accepted 20 September 2023

DOI:https://doi.org/10.1103/PhysRevLett.131.171801

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society