$e^+e^- \rightarrow s\bar{s}$ at $\sqrt{s} = 250$ GeV at future linear colliders

J. P. MÃ¡rquez; R. PÃ¶eschl; A. Irles; F. Richard

paper

$e^{+} e^{-} \to s s ˉ$ at $s = 250$ GeV at future linear colliders

arXiv:2603.04200

Abstract

The forward-backward asymmetry ( $A_{F B}$ ) in light-quark production is a sensitive probe of the electroweak sector and potential flavour-dependent BSM effects. We present a study of $e^{+} e^{-} \to s s ˉ$ at $s = 250$ GeV at future linear colliders, using full ILD simulation and reconstruction tools for ILC and LCF@CERN. We assess the impact of particle identification on charge reconstruction and $A_{F B}$ extraction, considering software improvements using Comprehensive PID (CPID) for optimal $d E / d x$ usage, as well as hardware scenarios including cluster counting ( $d N / d x$ ) and ideal TPC performance. Statistical precision gains are evaluated, with corrections for charge misidentification and acceptance applied. Results indicate that precise $A_{F B}^{s s ˉ}$ measurements are feasible and that advanced PID is key to maximising sensitivity to electroweak and new-physics effects.

Proceeding for LCWS2025

e+e−→ssˉ at s​=250 GeV at future linear colliders

Abstract

$e^{+} e^{-} \to s s ˉ$ at $s = 250$ GeV at future linear colliders