Determination of the strange-quark density of the proton from ATLAS measurements of the W→ℓν and Z→ℓℓ cross sections
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| Publication date | 2012 |
| Journal | Physical Review Letters |
| Article number | 012001 |
| Volume | Issue number | 109 | 1 |
| Number of pages | 17 |
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| Abstract | A QCD analysis is reported of ATLAS data on inclusive W± and Z boson production in pp collisions at the LHC, jointly with ep deep-inelastic scattering data from HERA. The ATLAS data exhibit sensitivity to the light quark sea composition and magnitude at Bjorken x∼0.01. Specifically, the data support the hypothesis of a symmetric composition of the light quark sea at low x. The ratio of the strange-to-down sea quark distributions is determined to be 1.00+0.25−0.28 at absolute four-momentum transfer squared Q2=1.9 GeV2 and x=0.023. |
| Document type | Article |
| Note | ATLAS Collaboration |
| Language | English |
| Published at | https://doi.org/10.1103/PhysRevLett.109.012001 |
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