The O(α) radiative corrections to the process p p (−) → γ∗, Z → `+`− (` = e, μ) are calculated. Factorizing the collinear singularity associated with initial state photon bremsstrahlung into the parton distribution functions, we find that initial state corrections have a much smaller effect than final state radiative corrections. Due to mass singular logarithmic terms associated with photons em...

We illustrate one-loop weak corrections to three-jet production in ee at √ s = MZ , to the production of a Z or γ in association with a hard jet at hadron colliders and to the production cross section of two b-jets at Tevatron and Large Hadron Collider (LHC).

We present a complete next-to-leading order (NLO) calculation for the total cross section of inclusive Higgs pair production via bottom-quark fusion (bb̄ → hh) at the CERN Large Hadron Collider (LHC) in the Standard Model. The NLO QCD corrections lead to less dependence on the renormalization scale (μR) and the factorization scale (μF ) than the leading-order (LO) cross section, and they signifi...

In April 2007 the Large Hadron Collider (LHC) will start providing pp collisions at √ S = 14 TeV. The main goal [ 1] of this new enterprise is the exploration of a yet uncharted energy domain, and QCD will provide an essential tool for the analysis and the decoding of the immense set of data that will be collected by the three detectors currently being built [ 2]. The production rates for most ...

The study of the properties of the top quark is one of the main goals of the Large Hadron Collider (LHC) physics program. The experimental precision expected at the LHC requires the calculation of several top-quark related observables beyond leading order in the strong coupling constant. In this work we briefly review the status of the theoretical predictions for the top-quark production proces...

The large cross section for t t̄ production at the large hadron collider (LHC) and at any future hadron collider provides a high-statistics and relatively clean environment for a study of W boson properties: after tagging on a leptonic decay of one of the W s and the two b jets, an additional W still remains in the event. We study the prospect of making the first exclusive hadronic decay of a fu...

We report simulation results for the LHC Higgs search with two charged leptons (electrons or muons) and missing energy from the decay chain H ! W+W ! `+ `0 . It is shown that a few simple experimental criteria allow to distinguish between events originating from H ! W+W and the non resonant production of W+W X at the LHC. We also include backgrounds from t t andWt(b) production. Using the late...