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T: Fachverband Teilchenphysik

T 5: Electroweak Interactions (Exp.) 1

T 5.3: Talk

Monday, March 21, 2022, 16:50–17:05, T-H18

Measurement of the differential W→ µ +ν cross section at high transverse masses at √s=13 TeV with the ATLAS detector. — Frank Ellinghaus, Frederic Schröder, and •Johanna Wanda Kraus — Bergische Universität Wuppertal

The cross section of the charged-current Drell-Yan process in the decay W→ µ +ν is measured with data taken with the ATLAS detector from pp-collisions at a center-of-mass energy of √s=13 TeV. The full run 2 dataset of L=139 fb⁻¹ is analyzed.
While the inclusive cross-section is well-known, a differential measurement at very high transverse masses is done for the first time. The cross-section will also be measured double-differentially in the transverse mass of the W-boson m_T^W and the pseudorapidity of the lepton.
This measurement is important since it can be used to constrain the parton distribution function of the proton as well as electroweak parameters.
A quick overview of the complete analysis will be given while the main focus is on the unfolding strategy via Iterative Bayesian Unfolding.