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T: Fachverband Teilchenphysik

T 5: Elektroschwache Wechselwirkung 1

T 5.1: Vortrag

Montag, 27. März 2017, 16:45–17:00, JUR 372

Measurement of the W boson mass with the ATLAS detector — •Samuel Webb¹, Jakub Cuth¹, Sasha Glazov², Mikhail Karnevskyi², Tai-Hua Lin¹, Matthias Schott¹, Giovanni Siragusa³, Raimund Ströhmer³, and Christoph Zimmermann¹ — ¹Johannes Gutenberg-Universität, Mainz, Germany — ²DESY, Hamburg, Germany — ³Julius-Maximilians-Universität, Würzburg, Germany

A measurement of the W-boson mass is presented based on 4.6 fb⁻¹ of proton–proton collision data recorded in 2011 at a centre-of-mass energy of 7 TeV with the ATLAS detector at the LHC. The selected data sample consists of 7.8×10⁶ candidates in the W→µν channel and 5.9×10⁶ candidates in the W→ eν channel. The W-boson mass is determined using template-fits to the reconstructed distributions of the transverse momentum of the charged leptons and the transverse mass of the W bosons in the electron and muon decay channels. The dominant experimental systematic uncertainties will be discussed, as well as those due to the modelling of the vector boson production and decay.