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Measurement of the W boson mass with the ATLAS detector

F. Balli

in XXV International Workshop on Deep-Inelastic Scattering and Related Subjects

Contribution: pdf


The W boson mass ($m_W$) is a fundamental parameter of the Standard Model (SM) and was measured by several experiments at high energy $e^{+}e^{-}$ and $p\bar{p}$ colliders. This parameter's measurement has the biggest impact on indirect searches for new particles or interactions, by comparing the measurement of this parameter with the prediction from the SM. Its current value, which combines several independent measurements, is 80385 $\pm$ 15 MeV. It was measured recently by the ATLAS experiment at LHC, using data recorded in 2011, with a centre of mass energy of 7 TeV. This measurement provides the following value for $m_W$ : 80370 $\pm$ 19 MeV. This proceeding reviews some aspects of the measurement and includes some considerations for future measurements at the LHC.