arXiv subjects

Maren Stratmann

Publications and source records attributed to Maren Stratmann.

2 recordsLinked to original sources

arXiv2025

Measurement of the differential $t$-channel production cross-section of single top quarks and top antiquarks at $\sqrt{s} = $13 TeV with the ATLAS detector

Differential production cross-sections of single top quarks and top antiquarks are measured in proton-proton collisions at a centre-of-mass energy $\sqrt{s} = $13 TeV. The full Run-2 dataset collected by the ATLAS detector at the LHC in the years 2015-2018 is used. The differential cross-sections are measured as a function of the transverse momentum and absolute rapidity of the top (anti)quark. The measurement results are compared to predictions obtained from fixed order calculations, different matrix-element event generators and different parton distribution function sets. The results agree with the theoretical predictions within the measurement uncertainties. An effective field theory interpretation of the measurement sets constraints on the contribution of the four-fermion operator $O_{Qq}^{3,1}$.

hep-ex↗

arXiv2024

Measurement of the $t$-channel single top-quark production cross section at $\sqrt{s}=13$ TeV with the ATLAS detector and interpretations of the measurement

The $t$-channel is the dominant production channel for single top-quarks at the LHC. The total cross section of this process is measured by ATLAS in proton-proton collisions at a center-of-mass energy $\sqrt{s}=13$ TeV. The production cross sections for single top-quarks and single top-antiquarks are measured to be $\sigma_{tq}=\text{137}^{+8}_{-8}$ pb and $\sigma_{\bar{t}q}=\text{84}^{+6}_{-5}$ pb. For the combined cross section and the ratio of the cross sections $R_t$, $\sigma_{tq+\bar{t}q}=\text{221}^{+13}_{-13}$ pb and $R_t=\text{1.636}^{+0\text{.}036}_{-0\text{.}034}$ are obtained. As interpretations of the measurement, limits are set on the EFT operator $O_{Qq}^{3,1}$ and on the CKM matrix elements $|V_{td}|$, $|V_{ts}|$ and $|V_{tb}|$.

hep-ex↗