Speaker
Remie Hanna
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
Description
Several measurements performed by the ATLAS collaboration are either
useful to constrain the proton structure or are affected by its
associated uncertainties.
The strange-quark density is rather poorly known at low x. Measurements
of the W+c production and the inclusive W and Z differential cross
sections are found to constrain the strange-quark density. Drell-Yan
cross section measurements performed above and below the Z peak region
have a different sensitivity to parton flavour, parton momentum fraction
x and scale Q compared to measurements on the Z peak and can also be
used to constrain the photon content of the proton.
Measurements of the inclusive jet and photon cross sections are standard
candles and can be useful to constrain the medium and high x gluon
densities.
Precision electroweak studies performed by ATLAS can be limited by the
current knowledge on the proton structure. Among those are the
measurement of the effective weak mixing angle and the mass of the W
boson. Dedicated PDF studies were performed by ATLAS to evaluate the
impact of PDF uncertainties in these measurements.
Author
Cristobal Padilla Aranda
(IFAE-Barcelona (ES))
