Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 74: Top physics 3 (single top)

T 74.2: Vortrag

Mittwoch, 6. März 2024, 16:15–16:30, Geb. 30.95: Audimax

Measurement of differential cross-sections of associated production of a top-quark and a Z-boson — •Nilima Akolkar and Ian Brock — Physikalisches Institut, Universität Bonn

The associated production of a single top-quark with a Z-boson (tZq) is a rare process at the LHC. This process is of special interest, as it allows one to probe the couplings of the Z-boson to the quark sector and to the W-boson simultaneously.

This talk will focus on the differential cross-section measurement of the tZq process, analyzed in the trilepton decay channel. The data used were collected with the ATLAS detector during Run 2 of the LHC, corresponding to an integrated luminosity of 140 fb⁻¹ . The tZq differential cross-section is measured using profile likelihood unfolding. The presentation will include the outcomes of tests conducted to assess the method’s robustness in addition to Asimov fit results.

Keywords: Unfolding; Differential cross-section; tZq