IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Determination of the strange quark density of the proton from ATLAS data on W-> lnu and Z->ll cross-sections
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2012 vol. 213 p. 1 - 23
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(+0.25-0.28) at absolute
four-momentum transfer squared Q^2 = 1.9 GeV^2 and x = 0.023.