We consider the ratio of the cross section of production of heavy bottom-antibottom pairs (σ b ¯ b) to the cross section of production of top-antitop pairs (σ t ¯ t) at LHC. We show that in this ratio a major fraction of virtual contributions (including QCD components) disappears, leaving a residual dominant electroweak Yukawa effect that might be strongly enhanced in the presence of supersymme...

The weak-boson fusion process is expected to provide crucial information on Higgs boson couplings at the Large Hadron Collider at CERN. The achievable statistical accuracy demands comparison with next-to-leading order QCD calculations, which are presented here in the form of a fully flexible parton Monte Carlo program. QCD corrections are determined for jet distributions and are shown to be mod...

We present state-of-the-art cross section predictions for the production of supersymmetric squarks and gluinos at the upcoming LHC run with a centre-of-mass energy of √ s = 13 and 14 TeV, and at potential future pp colliders operating at √ s = 33 and 100 TeV. The results are based on calculations which include the resummation of soft-gluon emission at next-to-leading logarithmic accuracy, match...

In this paper I study final state QCD radiative corrections to offshell single top production via decaying W at hadron collider energies. With respect to the narrow width approximation, taking into account the widths of the particles lowers the cross section, but QCD corrections to Γtop enhance it. The tree level Breit-Wigner distribution of the produced top invariant mass is distorted by final...

This writeup is an introduction to some of the experimental issues involved in performing electroweak and b physics measurements at the Fermilab Tevatron. In the electroweak sector, we discussW andZ boson cross section measurements as well as the measurement of the mass of the W boson. For b physics, we discuss measurements of B0=B0 mixing and CP violation. This paper is geared towards nonexper...

I present a brief theoretical update on top quark pair production at the Tevatron and give values of the NNLO-NNNLL cross section for both mt = 175 and 178 GeV. I then present a calculation of the cross section for charged Higgs production in association with a top quark at the LHC, including NNLO soft-gluon corrections. 1 Top quark production at the Tevatron The properties of the top quark, in...

The pair production cross section for scalar and vector leptoquarks at ep colliders is calculated for the case of photon{gluon fusion. In a model independent analysis we consider the most general C and P conserving couplings of gluons and photons to both scalar and vector leptoquarks described by an eeective low{energy Lagangian which obeys U (1) em SU (3) c invariance. Numerical predictions ar...

The LHC data will provide sensitivity to an unification of the couplings at low energies in the range ∼10-100 TeV. It is demonstrated in this note that the lack of knowledge on the proton structure, specifically its gluon distribution, can lower dramatically the sensitivity of bare cross section measurements to this physics. However, some more elaborated strategies could probably be developped ...

We discuss recent calculations of the survival probability of the large rapidity gaps in exclusive processes of the type pp → p+ A+ p at high energies. Absorptive or screening effects are important, and one consequence is that the total cross section at the LHC is predicted to be only about 90 mb. At the LHC, the observation of an exclusive process of the type pp → p + A + p, where a produced n...

I present analytical expressions for the collinear and soft gluon corrections to Higgs production via the process b ¯ b → H as well as gg → H through next-to-next-to-next-to-leading order (NNNLO). The soft corrections are complete while the collinear corrections include leading and some subleading logarithms. Numerical results at the Tevatron and the LHC are presented, primarily for b ¯ b → H. ...