TY  - GEN
Y1  - 2016///
ID  - heidok21708
A1  - Lang, Valerie Susanne
N2  - The production of W bosons in association with jets serves as a precision test of perturbative quantum chromodynamics (pQCD). Split into W? and W? production, it provides access
to the valence quark composition in the proton. The measurement of W + jets production presented here uses 20.3fb?¹ of proton-proton collision data at a center-of-mass energy of ?s = 8TeV recorded with the ATLAS detector. The cross section measurement is performed
in the decay channel W ? e? for the charge-independent W production as well as W? and W? production separately, as a function of the jet multiplicity and differentially as a function of six observables in association with at least one or two jets. The results are compared to leading-order multi-leg and next-to-leading order pQCD calculations. The cross section ratio (W? + jet)/(W? + jet) is shown to be sensitive to the ratio of valence quark distribution
functions in the proton, in a range of the momentum fraction x ? 0.1 ? 0.5. This range is accessible so far mainly by fixed-target deep inelastic scattering experiments and the W asymmetry measurements at the Tevatron. The ratio of W? to W? production is measured
as a function of the jet multiplicity and six observables in the presence of at least one or at least two jets, providing essential input to global fits of parton distribution functions.
TI  - Measurement of the W boson production in association with jets using ?s = 8TeV proton-proton collisions at
the ATLAS detector
CY  - Heidelberg
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/21708/
AV  - public
ER  -