IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Determination of the strange quark density of the proton from ATLAS measurements of the W−>lν and Z−>ll cross sections
Autor/es:
MARTIN TRIPIANA; THE ATLAS COLLABORATION
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2012 vol. 109 p. 12001 - 12019
ISSN:
0031-9007
Resumen:
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 1.00-0.28+0.25 at absolute four-momentum transfer squared Q2=1.9  GeV2 and x=0.023.