Abstract
This Letter reports a measurement of the muon charge asymmetry from W bosons produced in proton–proton collisions at a centre-of-mass energy of 7 TeV with the ATLAS experiment at the LHC. The asymmetry is measured in the W→μν decay mode as a function of the muon pseudorapidity using a data sample corresponding to a total integrated luminosity of 31 pb−1. The results are compared to predictions based on next-to-leading order calculations with various parton distribution functions. This measurement provides information on the u and d quark momentum fractions in the proton.
| Original language | English |
|---|---|
| Pages (from-to) | 31-49 |
| Number of pages | 19 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 701 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 27 Jun 2011 |
| Externally published | Yes |
Keywords
- Charge asymmetry
- Muon decay mode
- Parton distribution function
- W production
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ATLAS Collaboration (2011). Measurement of the W charge asymmetry in the W→μν decay mode in pp collisions at √s=7 TeV with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 701(1), 31-49. https://doi.org/10.1016/j.physletb.2011.05.024