Several sources, both experimental and theoretical, subject inclusive jet cross section measurements to large uncertainties. On the experimental side, the energy scale contributes between 10% and 30% uncertainties. On the theoretical side, choice of parton distribution function introduces a 20% variation in the prediction; freedom in renormalization scale provides another uncertainty of up to 3...

We discuss hadronic effects in the muonium hyperfine structure and derive an expression for the hadronic contribution to the hfs interval in form of the onedimensional integral of the cross section of e+e− annihilation into hadrons. Higherorder hadronic contributions are also considered.

The top quark will be extensively studied at future muon colliders. The threshold cross section can be measured precisely, and the small beam energy spread is especially effective at making the measurement useful. We report on all the activities of the top quark working group, including talks on top quark physics at other future colliders.

Some general considerations on a future linear collider and selected topics of two photon physics measurements which can be performed at such a collider are presented. This review discusses the total photon-photon cross section, jet cross sections, structure functions, charm production, the BFKL Pomeron, W pair production, and Higgs production.

Uncertainties in the NLO calculation of the inclusive jet cross section due to the choice renormalization scale and parton distribution functions are explored. These are found to be similar to the size of the experimental uncertainties of the measured cross section.

Abstract. A multi-dimensional (x,y,z,Ph⊥) extraction of cosφh and cos2φh azimuthal asymmetries of unpolarized Semi-Inclusive Deep Inelastic Scattering at HERMES is discussed. The use of data taken with hydrogen and deuterium targets and the separation of positive and negative hadrons allow to access flavor-dependent information about quark intrinsic transverse momenta and spinorbit correlations...

Higgs Tevatron combination, more data and new channels (WH → τνbb̄, VH → ττbb̄/ j jττ , VH → j jbb̄, tt̄H → tt̄bb̄) have been added. Most previously used channels have been reanalyzed to gain sensitivity. We use the latest parton distribution functions and gg → H theoretical cross sections when comparing our limits to the SM predictions. With 2.0-3.6 fb−1 of data analyzed at CDF, and 0.9-4.2 fb−1 at ...

A new measurement of the cross section of Be(p, γ)B will be done in inverted kinematics with the recoil separator ERNA at the CIRCE laboratory in Caserta, Italy. The B recoils will be produced in a windowless hydrogen gas target. We report here on the construction and characterization of the gas cell. In detail we describe measurements for target density, the profile determination via the Li(p,...