Abstract: We discuss the resummation of threshold logarithms for heavy quark and dijet cross sections in hadronic collisions. The resummed cross sections are presented at next-to-leading logarithmic accuracy in terms of anomalous dimension matrices which describe the factorization of soft gluons from the hard scattering. We apply our formalism to the calculation of the top quark production cros...

Results for higher-order threshold enhancements in high-E T jet production in hadron-hadron collisions are presented. Expressions are given for the next-to-next-to-leading order (NNLO) threshold corrections to the single-jet inclusive cross section at next-to-leading logarithmic (NLL) accuracy. The corrections are found to be small for the specific choice of E T /2 for the factorization and ren...

plastic" to study the body's appearance in cross section using a drawing device to trace the fluoroscopic image on paper. After some time the method fell into disuse. In 1942 Prof. Yoshihiko Koga * began using another method to study the chest in which multiple exposures were made with the body rotated systematically through numerous angles. At the time the name rotating radiography was used. U...

Upper limits on the cross section for Standard Model Higgs-boson production in p¯ p → H + X at √ s = 1.96 TeV are determined for 100 < mH < 200 GeV/c 2. The contributing production processes include associated production (W H → νb ¯ b, ZH → /ννb ¯ b) and gluon fusion (H → W + W −). Analyses are conducted with integrated luminosities from 0.84 fb −1 to 1.05 fb −1 recorded by the DØ experiment. L...

Searches for standard model Higgs boson production in p¯ p collisions at √ s = 1.96 TeV have been carried out for Higgs boson masses (mH) in the range 100 < mH < 200 GeV/c 2. Analyses are conducted with integrated luminosities from 1.1 fb −1 to 3.0 fb −1. As no significant excess is observed, we proceed to set limits on standard model Higgs boson production. The observed 95% confidence level up...

Top quark pair production cross section has been measured at the Tevatron by CDF and DØ collaborations using different channels and methods, in order to test standard model predictions, and to search for new physics hints affecting the tt̄ production mechanism or decay. Measurements are carried out with an integrated luminosity of 1.0 to 2.0 fb, and are found to be consistent with standard model...

I present a calculation of threshold soft-gluon corrections to single top quark production in pp̄ collisions via all partonic processes in the t and s channels and via associated top quark and W boson production. The soft-gluon corrections are formally resummed to all orders, and finite-order expansions of the resummed cross section are calculated through next-to-next-to-next-to-leading order (N...

We propose a procedure to measure the Z 0 line shape and take full advantage of the superb performance of the CERN e + e − Collider LEP. A precise determination of the total cross section at 5 energies is needed for a model-independent analysis of the data and for a precision test of the QED initial state radiation from the fully inclusive hadronic channel.

A combination is presented of the inclusive diffractive cross section measurements made by the H1 and ZEUS Collaborations at HERA. The analysis uses diffractive deep inelastic scattering data selected by means of proton spectrometers. Correlations of systematic uncertainties are taken into account by the combination method, resulting in improved precision.