Measurement of $W^\pm$ boson production in Pb+Pb collisions at $\sqrt{s_\mathrm{NN}} = 5.02$ TeV with the ATLAS detector
ATLAS Collaboration
TL;DR
This paper reports the measurement of $W^"+$ boson production in lead-lead collisions at 5.02 TeV using the ATLAS detector, providing insights into nuclear effects on electroweak boson production in heavy-ion collisions.
Contribution
The study presents the first detailed measurement of $W^"+$ boson yields and charge asymmetry in Pb+Pb collisions at this energy, comparing results with various nuclear parton distribution functions.
Findings
No dependence of normalized yields on collision centrality.
Good agreement with theoretical predictions for mid-central and central collisions.
Peripheral collisions show slight deviations within experimental uncertainties.
Abstract
A measurement of boson production in lead-lead collisions at TeV is reported using data recorded by the ATLAS experiment at the LHC in 2015, corresponding to a total integrated luminosity of . The bosons are reconstructed in the electron or muon leptonic decay channels. Production yields of leptonically decaying bosons, normalised by the total number of minimum-bias events and the nuclear thickness function, are measured within a fiducial region defined by the detector acceptance and the main kinematic requirements. These normalised yields are measured separately for and bosons, and are presented as a function of the absolute value of pseudorapidity of the charged lepton and of the collision centrality. The lepton charge asymmetry is also measured as a function of the absolute value of lepton…
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