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Sonnenschein, Lars

Publications and source records attributed to Sonnenschein, Lars.

Highlights of D0 QCD Related Analyses

D0 provides a wealth of measurements conceived for probing perturbative and non-perturbative aspects of QCD, giving an accurate experimental account for Standard Model production processes including jets, leptons and photons and improving the sensitivity and the understanding in searches for new physics. Among the most important subjects are inclusive jet production, vector boson plus jet production, direct photon production and measurements in Minimum Bias events and Double Parton Scattering which are discussed here and compared to theory predictions.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗

Tevatron QCD for Cosmic-Rays

The two multi-purpose experiments D0 and CDF are operated at the Tevatron collider, where proton anti-proton collisions take place at a centre of mass energy of 1.96 TeV in Run II. In the kinematic plane of Q{sup 2}-scale and (anti-)proton momentum fraction x, Tevatron jet measurements cover a wide range, with phase space regions in common and beyond the HERA ep-collider reach. The kinematic limit of the Auger experiment is given by a centre of mass energy of 100 TeV. Cosmic rays cover a large region of the kinematic phase space at low momenta x, corresponding to forward proton/diffractive physics and also at low scales, corresponding to the hadronization scale and the underlying event. Therefore of particular interest are exclusive and diffractive measurements as well as underlying event, double parton scattering and minimum bias measurements. The kinematic limit of the Tevatron corresponds to the PeV energy region below the knee of the differential cosmic particle flux energy distribution. The data discussed here are in general corrected for detector effects, such as efficiency and acceptance. Therefore they can be used directly for testing and improving existing event generators and any future calculations/models. Comparisons take place at the hadronic final state (particle level).

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗